STIHL MS 461
Contents
1. e Place the new spring with frame in position in the fan housing the anchor loop arrow must engage the lug in the housing Apply suitable tools screwdriver punch etc to the recesses and push the spring into its seat in the fan housing it slips out of the frame in this process Reinstall the rope rotor tension the rewind spring fit the fan housing and secure it in position 33 English Storing the Machine For periods of 3 months or longer 34 Drain and clean the fuel tank in a well ventilated area Dispose of fuel properly in accordance with local environmental requirements Run the engine until the carburetor is dry this helps prevent the carburetor diaphragms sticking together Remove the saw chain and guide bar clean them and spray with corrosion inhibiting oil Thoroughly clean the machine pay special attention to the cylinder fins and air filter If you use a biological chain and bar lubricant e g STIHL BioPlus completely fill the chain oil tank Store the machine in a dry high or locked location out of the reach of children and other unauthorized persons Checking and Replacing the Chain Sprocket Remove chain sprocket cover saw chain and guide bar Release chain brake pull hand guard against the front handle Fit new chain sprocket after use of two saw chains or earlier if the wear marks arrows are deeper than 0 5 mm otherwise th2. Check condition Check sharpness English Do not touch the chain while the engine is running If the chain becomes jammed by an obstruction switch off the engine immediately before attempting to remove the obstruction To reduce the risk of injury shut off the engine before changing the saw chain To reduce the risk of fire do not smoke while operating or standing near your power tool Note that combustible fuel vapor may escape from the fuel system If your power tool is subjected to unusually high loads for which it was not designed e g heavy impact or a fall always check that it is in good condition before continuing work see also Before Starting Check the fuel system in particular for leaks and make sure the safety devices are working properly Do not continue operating your power tool if it is damaged In case of doubt have the machine checked by your servicing dealer Make sure the idle speed setting is correct The chain must not run when the engine is idling with the throttle trigger released Check and correct the idle speed setting at regular intervals If the saw chain still moves have your dealer check your machine and make proper adjustments or repairs Reactive Forces The most common reactive forces that occur during cutting are kickback pushback and pull in English Dangers of kickback Kickback can result in serious or fatal injury 2 d o 2 lt a S Ss
3. The following information applies under normal operating conditions The specified intervals must be shortened accordingly when working for longer than normal each day or under difficult conditions 5 v extensive dust highly resinous lumber lumber from tropical trees etc If the machine is only used 3 2 occasionally the intervals can be extended accordingly x D o x 15 2 Eile ile E g u Qu sie 3 a 2 ea S 5 2 5S 8g S Sla s f c 23 jas S fs amp visual inspection condition leaks x x Complete machine clean x Throttle trigger throttle trigger lockout master con Checking operation x x trol lever Checking operation x x Chain brake have checked by a specialist dealer x check Fuel pick up body filter in fuel tank clean replace filter insert x x replace x x x Fuel tank clean x Lubricating oil tank clean Chain lubrication check x check pay attention to sharpness x x Saw chain Check the chain tension x sharpen x check wear damage x clean and turn over x Guide bar deburr x replace x x Chain sprocket check x clean x x Air filter replace x check x x Antivibration elements have them replaced by a specialist dealer x MS 461 39 English The following information applies under normal operating conditions The specified intervals must be shortened accordingly when working for longe
4. Directive Vibration 2002 44 EC see www stihl com vib Sound pressure level Lpeq to ISO 22868 105 dB A Sound power level Lweg to ISO 22868 116 dB A Vibration level apy eq to ISO 22867 Handle Handle left right MS 461 4 0 m s 3 8 m s MS 461 Rescue Saw 5 8 m s 5 3 m s The K factor in accordance with Directive 2006 42 EC is 2 5 dB A for the sound pressure level and sound power level the K factor in accordance with Directive 2006 42 EC is 2 0 m s for the vibration measurement 43 English REACH REACH is an EC regulation and stands for the Registration Evaluation Authorisation and Restriction of Chemical substances For information on compliance with the REACH regulation EC No 1907 2006 see www stihl com reach 44 Special Accessories Chain scabbard If you use guide bars of different lengths on the saw the length of the chain scabbard must be matched to the guide bar to help reduce the risk of injury If the chain scabbard does not cover the full length of the guide bar a suitable chain scabbard or a scabbard extension is necessary Depending on the model the scabbard extension either comes standard with the saw or is available as a special accessory Fitting the chain scabbard extension STE pre B D a STE a 1 z2 x n So N lt a o oS e Push the scabbard extension locking tabs 1 first onto the sc
5. English Adjusting the Carburetor Basic information The carburetor comes from the factory with a standard setting The carburetor has been adjusted for optimum performance and fuel efficiency in all operating states The adjusting screws on this carburetor can only be set within narrow limits The ignition module limits the maximum speed It is therefore not possible to increase the maximum speed by further turning the high speed screw H in the clockwise direction making the mix leaner If you make the setting too lean it will increase the risk of engine damage through lack of lubrication and overheating Standard setting Switch off the engine Check the air filter clean or replace it if necessary Check the spark arresting screen in the muffler present only in some countries clean or replace it if necessary 29 English 3443BA001 KN e Turn the high speed screw H counterclockwise as far as possible max 3 4 turn e Turn the low speed screw L clockwise as far as possible then back off 1 4 turn Setting the idle speed Engine stops when idling or saw chain rotates at idle speed zZ x a gt S lt fre n Check the standard setting Turn the idle speed adjusting screw LA clockwise until the saw chain begins to run then turn it back 1 1 2 turns A If the saw chain continues to keep rotating in idle even after adjustment have the chain saw
6. Kickback occurs when the saw is suddenly thrown up and back in an uncontrolled arc towards the operator Kickback occurs e g pn is D gt lt a Q when the upper quadrant of the bar nose unintentionally contacts wood or another solid object e g when another limb is touched accidentally during limbing when the chain at the nose of the guide bar is pinched in the cut Quickstop chain brake This device reduces the risk of injury in certain situations it cannot prevent kickback If activated the brake stops the saw chain within a fraction of a second for a description of this device refer to chapter on Chain Brake in this manual To reduce the risk of kickback Work cautiously and avoid situations which could cause kickback Hold the saw firmly with both hands and maintain a secure grip Always cut at full throttle Beaware of the location of the guide bar nose at all times Do not cut with the bar nose Take special care with small tough limbs they may catch the chain Never cut several limbs at once Donotoverreach Never cut above shoulder height Use extreme caution when re entering a previous cut Do not attempt plunge cuts if you are not experience in this cutting technique Be alert for shifting of the log or other forces that may cause the cut to close and pinch the chain Always cut with a cor
7. STIHL Bioplus since it will otherwise quickly turn to resin This results in hard deposits that are difficult to remove especially in the area of the chain drive and chain It may even cause the oil pump to seize The service life of the chain and guide bar depends on the quality of the lubricant It is therefore essential to use only a specially formulated chain lubricant A Do not use waste oil Renewed contact with waste oil can cause skin cancer Moreover waste oil is environmentally harmful Waste oil does not have the necessary lubricating properties and is unsuitable for chain lubrication MS 461 Filling Chain Oil Tank Preparing the machine z x id lt a 8 Ss e Thoroughly clean the oil filler cap and the area around it to ensure that no dirt falls into the oil tank e Always position the machine so that the filler cap is facing upwards e Open the filler cap Filling the chain oil tank Standard oil pump Fill the chain oil tank each time the fuel tank has been filled Oil pump with increased delivery rate available option It is necessary to check and refill the oil tank frequently see Adjusting the oil quantity Refill the oil tank when the fuel tank is approximately half empty English All versions Take care not to spill chain oil while refilling and do not overfill the tank STIHL recommends use of the STIHL filling system for chain oil available
8. 2 on the starter post and engage it on the pawls pegs the spring clip must point clockwise as shown in the illustration Tension the rewind spring Make a loop in the unwound starter rope and use itto turn the rope rotor six full revolutions in the direction of the arrow Hold the rotor steady Pull out and straighten the twisted rope Let go of the rotor Release the rope slowly so that it winds onto the rotor MS 461 The starter grip must locate firmly in the guide bushing If the grip droops to one side Add one more turn on the rope rotor to increase spring tension When the starter rope is fully extended it must still be possible to rotate the rotor another half turn If this is not the case the spring is overtensioned and could break Take one turn of the rope off the rotor Fit the fan housing on the crankcase Set the Master Control lever to the stop position 0 and push the remaining rope into the grip until the nipple is flush with the top of the grip Replacing a Broken Rewind Spring Remove the rope rotor A The bits of spring may still be under tension and could fly apart when you take them out of the fan housing wear face protection and work gloves Use a screwdriver to carefully remove the parts of the spring from the housing Lubricate the new spring with a few drops of non resinous oil English z g y A lt a Co
9. Do not drop start your machine the correct starting procedure is described in the instruction manual Do not attempt to start the saw when the saw chain is in a cut Holding and Controlling the Power Tool Always hold your saw firmly with both hands Right hand on the rear handle even if you are left handed To ensure safe control wrap your fingers tightly around the front and rear handles During Operation Make sure you always have good balance and secure footing MS 461 In the event of impending danger or in an emergency switch off the engine immediately by moving the Master Control lever stop switch to STOP or 0 Your power tool is designed to be operated by one person only Do not allow other persons in the work area Never leave a running machine unattended When the engine is running Note that the chain continues to rotate for a short period after you let go of the throttle trigger flywheel effect Take special care in slippery conditions damp snow ice on slopes uneven ground and freshly debarked logs Watch out for obstacles such as tree stumps roots and ditches which could cause you to trip or stumble Do not work alone keep within calling distance of others in case help is needed Be particularly alert and cautious when wearing hearing protection because your ability to hear warnings shouts alarms etc is restricted To reduce the risk of accidents take a break
10. Unleaded gasoline must be used in machines equipped with a catalytic converter 16 Using multiple tankfuls of leaded gasoline can substantially reduce the effectiveness of the catalytic converter Gasoline with an alcohol component exceeding 10 can cause impaired engine performance in engines with manually adjustable carburetors and thus should not be used in these engines Engines with M Tronic deliver full engine performance using gasoline with an alcohol component of up to 25 E25 Engine oil Use only high quality two stroke engine oil ideally STIHL HP HP Super or HP Ultra two stroke engine oil as they are specially engineered for STIHL engines HP Ultra ensures maximum performance and engine life The engine oils are not available in all markets Only STIHL two cycle engine oil 1 50 may be used to produce the fuel mixture for machines with a catalytic converter Mixing ratio for STIHL two cycle engine oil 1 50 1 50 1 part oil 50 parts gasoline Examples Quantity of STIHL two cycle engine gasoline oil 1 50 Liters Liters ml 1 0 02 20 5 0 10 100 10 0 20 200 15 0 30 300 20 0 40 400 25 0 50 500 Pour oil into an approved safety fuel canister first then add gasoline and mix thoroughly Storing fuel mixture Store in approved safety fuel canisters only in a dry cool and secure place protected against light and sunlight Fuel mixture ages mix only as much as n
11. accessory Electric Handle Heating do Switching on the handle heating system depending on equipment version e Insert cover plate 1 with both tabs arrows and snap it onto the fan housing Screw in screws 2 When the mounting kit is used the shutter must be in the winter position If engine trouble occurs first check whether use of the cover plate is necessary x e Set switch to I to switch off return switch to the 0 position Overheating during continuous use is impossible The heating system is maintenance free 22 Starting Stopping the Engine The four positions of the Master Control lever zZ 9 x lt a s Ss Stop 0 engine off ignition is switched off Run I engine is running or can start Warm start this position is for starting the warm engine Cold start k this position is for starting the cold engine Adjusting the Master Control lever The throttle trigger lockout and throttle trigger must be pressed simultaneously to adjust the Master Control lever from run I to cold start I MS 461 To set the Master Control lever to warm start first set it to cold start then push the Master Control lever into the warm start x position Changing to warm start x is only possible from the cold start position When the throttle trigger is squeezed the Master Control lever returns from warm start xM to run I To switch off the engi
12. conditions of use from very dusty to wintry conditions etc FA X S N lt d o ic e Wire mesh filter green filter housing Use in extra ordinary conditions e g extremely wintry conditions of use such as powder snow or drift snow Rather unsuitable in very dusty conditions When dry STIHL filters attain a long service life e Always use STIHL filters dry Fouled air filters will impair engine performance increase fuel consumption and make the machine more difficult to start MS 461 Remove air filter 145BA027 K Turn the knob above the rear handle in the direction of the arrow and remove the carburetor box cover x oo N o lt a o x e Remove filter MS 461 Cleaning the Air Filter Ifthere is a noticeable loss of engine power e Knock out the filter or blow it clear with compressed air from the inside outwards If knocking out or blowing out does not suffice or in the case of stubborn dirt or stuck filter fabric the filter must be subjected to a thorough cleaning Always replace a damaged filter Thorough filter cleaning Wash the filter in STIHL special purpose cleaner special accessory or a clean non flammable cleaning liquid e g warm soapy water rinse the filter from inside to out under a water jet do not use high pressure cleaners e Dryall filter parts do not expose to extreme heat e Do not oil the filter e Reinstall filter
13. link gauge 2 of the saw Turn the screw 1 chain 1 must match the groove counterclockwise until the tensioner width of the guide bar 3 slide 2 butts against the left end of If non matching components are used the housing slot Wear work gloves to protect your hands the cutting attachment may be damaged from the sharp cutters beyond repair after a short period of operation Fit the chain start at the bar nose 14 MS 461 pp en Em ee J cezo 204 34 i M det ao SUGG De AREA 001BA187 KN Fit the guide bar over the studs 1 the cutting edges on the top of the bar must point to the right Engage the peg of the tensioner slide in the locating hole 2 place the chain over sprocket 3 at the same time Turn the tensioning screw 4 clockwise until there is very little chain sag on the underside of the bar and the drive link tangs are engaged in the bar groove Refit the sprocket cover and screw on the nuts only fingertight Go to chapter on Tensioning the Saw Chain MS 461 Tensioning the Chain RN a Ve IN SIR BD Re 133BA024 KN Retensioning during cutting work Shut off the engine Loosen the nuts Hold the bar nose up Use a screwdriver to turn the tensioning screw 1 clockwise until the chain fits snugly against the underside of the bar While still holding the bar nose up tighten down the nuts firmly Go to Checking C
14. sharpened tensioned and well lubricated Always change the chain guide bar and sprocket in good time Check condition of clutch drum periodically Store fuel and chain lubricant in properly labelled safety type canisters only When handling gasoline avoid direct contact with the skin and avoid inhaling fuel vapour health risk To reduce the risk of injury shut off the engine immediately if the chain brake malfunctions contact your servicing dealer do not use your power tool until the problem has been rectified see Chain Brake 13 English Disengaging the chain brake Cutting Attachment Mounting the Bar and Chain STIHL is the only manufacturer in the industry to produce its own chain saws guide bars saw chains and chain sprockets Removing the chain sprocket cover A cutting attachment consists of the saw chain guide bar and chain sprocket 001BA186 KN The cutting attachment that comes standard is designed to exactly match the chain saw Pull the hand guarad towards the front handle until there is an audible click the chain brake is disengaged 143BA034 KN Unscrew the nuts and take off the chain sprocket cover Fitting the chain z E 5 lt a gt S The pitch t of the saw chain 1 chain sprocket and the nose sprocket of the Rollomatic guide bar must match rA x wo lt ao 5 o Zz x ise Q o lt a mn x The drive
15. using modern production techniques and comprehensive quality assurance Every effort has been made to ensure your satisfaction and troublefree use of the machine Please contact your dealer or our sales company if you have any queries concerning your machine Your lau Ce la Hans Peter Stihl CE This instruction manual is protected by copyright All rights reserved especially the rights to reproduce translate and process with electronic systems English Guide to Using this Manual Pictograms Pictograms that appear on the machine are explained in this Instruction Manual Depending on the machine and equipment version the following pictograms may appear on the machine Fuel tank fuel mixture of mie gasoline and engine oil Tank for chain oil chain oil Engage and release pen wa chain brake Coasting brake Direction of chain travel Ematic chain oil flow adjustment Tension saw chain Intake air baffle winter operation N Intake air baffle summer operation Handle heating Actuate decompression valve DL Actuate manual fuel pump Symbols in text A Warning where there is a risk of an accident or personal injury or serious damage to property Caution where there is a risk of damaging the machine or its individual components Engineering improvements STIHL s philosophy is to continually improve all of its products For this reason we may modify the design en
16. which have been approved by STIHL for this power tool or are technically identical Only use high quality replacement parts in order to avoid the risk of accidents and damage to the machine STIHL recommends the use of original STIHL replacement parts Original STIHL parts can be identified by the STIHL part number the STIHL logo and the STIHL parts symbol 7 the symbol may appear alone on small parts English EC Declaration of Conformity ANDREAS STIHL AG amp Co KG Badstr 115 D 71336 Waiblingen hereby confirms that Model Chain saw Make STIHL Type MS 461 MS 461 VW Serial identification number 1128 Displacement 76 5 cm conform to the specifications of Directives 2006 42 EC 2004 108 EC and 2000 14 EC and have been developed and built in compliance with the following standards EN ISO 11681 1 EN 55012 EN 61000 6 1 The measured and guaranteed equivalent sound power level has been determined in accordance with Directive 2000 14 EC Annex V and standard ISO 9207 Measured sound power level all MS 461 117 dB A Guaranteed sound power level all MS 461 119 dB A The EC type approval test was carried out at the DPLF Deutsche Pr f und Zertifizierungsstelle f r Land und Forsttechnik NB 0363 Max Eyth Weg 1 D 64823 Gro Umstadt 45 English Certification No all MS 461 K EG 2011 6144 The technical documentation has been retained by ANDREAS STIHL AG amp Co KG Pro
17. z x gt lt Q M oO Blip the throttle trigger 2 the Master Control lever 1 jumps to run I and the engine begins to idle MS 461 zZ x lt m Pull the hand guard toward the handlebar The chain brake is released the chain saw is ready for use Open the throttle only when the chain brake is off Increased engine speeds with the chain brake on saw chain is stationary will quickly damage the clutch and chain brake At very low temperatures Let the engine warm up briefly with the throttle slightly open if necessary configure for winter operation see Winter Operation Switch off the engine Move the Master Control lever to the stop position 0 If the engine does not start The Master Control lever was not returned to its warm start position in time when the engine turned over for the first time and the engine has now flooded English Remove the spark plug see Spark plug Dry the spark plug Move the Master Control lever to the stop position 0 Crank the engine several times with the starter to clear the combustion chamber Reinstall the spark plug see Spark plug Set the Master Control lever to warm start even if the engine is cold Restart the engine 25 English Operating Instructions During the break in period A factory new machine should not be run at high revs full throttle off load for the first th
18. STIHL STIHL MS 461 instruction Manual Original Instruction Manual Printed on chlorine free paper ANDREAS STIHL AG amp Co KG 2012 0458 773 0121 A VA0 D12 0000006216_001_GB Printing inks contain vegetable oils paper can be recycled Contents Guide to Using this Manual Safety Precautions and Working Techniques Cutting Attachment Mounting the Bar and Chain Tensioning the Chain Checking Chain Tension Fuel Fueling Chain Lubricant Filling Chain Oil Tank Checking Chain Lubrication Chain Brake Winter Operation Electric Handle Heating Starting Stopping the Engine Operating Instructions Oil Quantity Control Taking Care of the Guide Bar Air Filter System Remove air filter Cleaning the Air Filter Adjusting the Carburetor Spark Arresting Screen in Muffler Spark Plug Replacing the Starter Rope and Rewind Spring Storing the Machine Checking and Replacing the Chain Sprocket Maintaining and Sharpening the Saw Chain STIHL MS 461 14 14 15 15 16 17 19 19 20 20 21 22 22 26 27 27 28 29 29 29 30 31 32 34 34 35 Maintenance and Care Minimize Wear and Avoid Damage Main Parts Specifications Special Accessories Ordering Spare Parts Maintenance and Repairs EC Declaration of Conformity Quality Certification 39 42 43 44 45 45 46 English Dear Customer Thank you for choosing a quality engineered STIHL product This machine has been built
19. abbard until the required length is obtained Other special accessories File holder with round file Filing gauge Reference gauges STIHL lubricating grease STIHL filler nozzle for fuel helps avoid spills and overfilling during refueling STIHL filler nozzle for chain oil helps avoid spills and overfilling Contact your STIHL dealer for more information on these and other special accessories MS 461 Ordering Spare Parts Please enter your saw model serial number as well as the part numbers of the guide bar and saw chain in the spaces provided This will make re ordering simpler The guide bar and saw chain are subject to normal wear and tear When purchasing these parts always quote the saw model the part numbers and names of the parts Model Serial number Guide bar part number Chain part number MS 461 Maintenance and Repairs Users of this machine may only carry out the maintenance and service work described in this user manual All other repairs must be carried out by a servicing dealer STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information When repairing the machine only use replacement parts
20. amaged saw chain this leads to increased physical strain increased vibration load unsatisfactory cutting results and increased wear e Clean the saw chain Check the saw chain for cracks and damaged rivets Replace damaged or worn chain components and adapt these parts to the remaining parts in terms of shape and level of wear rework accordingly Carbide tipped Duro saw chains are especially wear resistant For an optimal sharpening result STIHL recommends STIHL servicing dealers A Compliance with the angles and dimensions listed below is absolutely necessary An improperly sharpened saw chain especially depth gauges that are too low can lead to increased kickback tendency of the chain saw risk of injury English Chain pitch 2 x Nn A gt lt a D The chain pitch marking a is embossed in the area of the depth gauge of each cutter Marking a Chain pitch Inches mm 7 1 44P 6 35 1 or 1 4 1 4 6 35 6 P or PM 3 8P 9 32 2 or 325 0 325 8 25 3 or 3 8 3 8 9 32 4 or 404 0 404 10 26 The diameter of file to be used depends on the chain pitch see table Sharpening tools The angles of the cutter must be maintained during resharpening 35 English Sharpening and side plate angles zZ x xv is lt ao a A Sharpening angle STIHL saw chains are sharpened with a 30 sharpening angle Ripping chains which are sharpened with a 10 s
21. and heartwood cuts require special training and experience Plunge cutting MS 461 For felling leaners For relieving cuts during bucking For DIY projects English z x R lt a Use a low kickback chain and exercise particular caution Begin cut by applying the lower portion of the guide bar nose do not use upper portion because of risk of kickback Cut until depth of kerf is twice the width of the guide bar Swing saw slowly into plunge cutting position take care because of the risk of kickback or pushback Make the plunge cut very carefully Danger of pushback Heartwood cut z x o lt ao Q fo If tree diameter is more than twice the length of the guide bar If a large portion of heartwood remains uncut on large diameter trees 11 English Ontrees that are difficult to fell oak beech to prevent heartwood splintering and maintain planned direction of fall On soft deciduous trees to relieve tension in lying log and prevent slivers in the center of the hinge being torn out of the log Make the plunge cut in the center of the felling notch there is a danger of pushback at this point then swing the bar in the direction of the arrow Limbing Do not attempt limbing unless you have been trained in the necessary techniques To reduce the risk of accidents and injury do not attempt felling or limbing if you are not an experienced chai
22. checked by a servicing dealer 30 Speed erratic when idling poor acceleration despite low speed screw 1 4 z x oO lt ao cr Idle speed setting is too lean turn the low speed screw L counterclockwise until the engine runs and accelerates smoothly Whenever the low speed screw L has been adjusted it usually also necessary to adjust the idle speed screw LA Correcting the carburetor setting for use at high altitudes The setting may have to be marginally corrected if engine performance is unsatisfactory at high altitudes e Check the standard setting Letthe engine warm up e Turn the high speed screw H slightly clockwise leaner max up to the stop After descending from a high altitude restore the carburetor setting to the standard setting If you make the setting too lean it will increase the risk of engine damage through lack of lubrication and overheating Spark Arresting Screen in Muffler In some countries the muffler is fitted with a spark arresting screen lf engine performance deteriorates check the spark arresting screen in the muffler Let the muffler cool down z x 2 3 lt ao 7 x x a 3443BA010 KN Remove four screws Remove exhaust casing 1 ofthe muffler e Bend back the retaining lugs 2 Pull out spark arresting sc
23. cinity of roads railways power lines etc take extra precautions If necessary inform the police utility company or railway authority Cutting Do not operate your saw with the starting throttle lock engaged Engine speed cannot be controlled with the throttle trigger in this position Work calmly and carefully in daylight conditions and only when visibility is good Ensure you do not endanger others stay alert at all times Use the shortest possible guide bar The chain guide bar and chain sprocket must match each other and your saw z Z NI oO S lt ao S Position the saw so that your body is clear of the cutting attachment Always pull the saw out of the cut with the chain running Use your chain saw for cutting only It is not designed for prying or shoveling away limbs roots or other objects Do not underbuck freely hanging limbs English To reduce the risk of injury take special care when cutting shattered wood because of the risk of injury from slivers being caught and thrown in your direction Make sure your saw does not touch any foreign materials Stones nails etc may be flung off damage the saw chain or cause the saw to kick back unexpectedly zZ a an oO So lt ao s If on a slope stand on the uphill side of the log Watch out for rolling logs When working at heights Always use a lift bucket Never work on a ladder or in a tree Never
24. duct approval The year of construction and the serial number are shown on the machine Waiblingen 12 12 2011 ANDREAS STIHL AG amp Co KG PP AS Head of Product Group Management Elsner 46 Quality Certification ISO 9001 TC Aa e N O lt a So Q oO All STIHL products comply with the highest quality standards An independent organization has certified that all products manufactured by STIHL meet the strict requirements of the ISO 9001 standard for quality management systems in terms of product development materials purchasing production assembly documentation and customer service MS 461 English MS 461 47 English 48 MS 461 0458 773 0121 A englisch 458 773 0121 A
25. e service life of the saw chain is reduced use check gauge special accessory to test Using two saw chains in alternation helps preserve the chain sprocket STIHL recommends use of original STIHL chain sprockets in order to ensure optimal functioning of the chain brake z lt NI A a Ss S Use a screwdriver to remove the E clip 1 Remove the washer 2 Remove rim sprocket 3 Inspect transport profile on the clutch drum 4 if there are also heavy signs of wear also replace the clutch drum Remove clutch drum or spur chain sprocket 5 including needle cage 6 from the crankshaft with QuickStop Super chain brake press throttle trigger lockout beforehand Install spur chain sprocket rim sprocket e Clean crankshaft stub and needle cage and lubricate with STIHL lubricant special accessory Slide needle cage onto the crankshaft stub MS 461 After refitting turn the clutch drum and or spur chain sprocket approx 1 full turn so that the carrier for the oil pump drive engages with QuickStop Super chain brake press throttle trigger lockout beforehand Refit the rim sprocket cavities toward the outside Refit washer and E clip on the crankshaft MS 461 Maintaining and Sharpening the Saw Chain Sawing effortlessly with a properly sharpened saw chain A properly sharpened saw chain cuts through wood effortlessly even with very little pushing Never use a dull or d
26. e the risk of injury always shut off the engine before carrying out any maintenance or repairs or cleaning the machine Exception Carburetor and idle speed adjustments Do not turn the engine over on the starter with the spark plug boot or spark plug removed unless the slide control stop switch is on STOP or 0 since there is otherwise a risk of fire from uncontained sparking To reduce the risk of fire do not service or store your machine near open flames Check the fuel filler cap for leaks at regular intervals Use only a spark plug of the type approved by STIHL and make sure it is in good condition see Specifications Inspect the ignition lead insulation in good condition secure connection Check the condition of the muffler English To reduce the risk of fire and damage to hearing do not operate your machine if the muffler is damaged or missing Do not touch a hot muffler since burn injury will result Vibration behavior is influenced by the condition of the AV elements check the AV elements at regular intervals Check the chain catcher and replace it if damaged Stopping the Engine before checking chain tension before retensioning the chain before replacing the chain before rectifying problems Observe sharpening instructions keep the chain and guide bar in good condition at all times for safe and correct handling of the saw The chain must be properly
27. eeded for a few weeks Do not store fuel mixture for longer than three months The fuel mixture can become unusable faster if exposed to light sunlight or low or high temperatures Shake the canister containing the fuel mixture thoroughly before refueling A Pressure can build up inside the canister open carefully The fuel tank and the canister in which fuel mixture is stored should be cleaned thoroughly from time to time MS 461 Residual fuel and the liquid used for cleaning must be disposed of in accordance with regulations and without harming the environment MS 461 Fueling mi Preparing the machine r oe raps Csi i E red a eed nd 001BA229 KN e Before fueling clean the cap and the area around it to ensure that no dirt falls into the fuel tank e Always position the machine so that the cap is facing upwards Opening 001BA236 KN e Raise the grip until it is upright N I S 001BA232 KN Turn the cap counterclockwise about a quarter turn Os 001BA234 KN Marks on tank cap and fuel tank must line up 2 x n oO N lt a o So Remove the cap Filling up with fuel Take care not to spill fuel while fueling and do not overfill the tank STIHL recommends you use the STIHL filler nozzle for fuel special accessory Fill up with fuel 17 English Closing 001BA234 KN Grip must be vertical e Fitthe cap
28. emitting power tools may be restricted to certain times by national or local regulations To operate the power tool you must be rested in good physical condition and mental health If you have any condition that might be aggravated by strenuous work check with your doctor before operating a power tool Persons with pacemakers only The ignition system of your power tool produces an electromagnetic field of a very low intensity This field may interfere with some pacemakers To reduce health risks STIHL recommends that persons with pacemakers consult their physician and the pacemaker manufacturer before operating this tool Do not operate the power tool if you are under the influence of any substance drugs alcohol which might impair vision dexterity or judgment To reduce the risk of accidents or injury put off the work in poor weather conditions rain snow ice wind Use your saw for cutting wood or wooden objects only Do not use your power tool for any other purpose since this may result in accidents Only use tools guide bars chains chain sprockets and accessories that are explicitly approved for this power tool model by STIHL or are technically identical If you have any questions in this respect consult a servicing dealer MS 461 Use only high quality parts and accessories in order to avoid the risk of accidents and damage to the machine STIHL recommends the use of STIHL original tools guide ba
29. f breakage Do not let the starter grip snap back guide it vertically back into the housing so that the starter rope can rewind properly With a new engine or after a long period of disuse with machines without an additional manual fuel pump it may be necessary to pull the starter rope several times to prime the fuel line 24 Starting the chain saw Decompression valve Pressthe button the decompression valve will be opened The decompression valve is closed automatically when the engine starts for the first time For this reason press the button again before each additional starting procedure A There must not be anyone within the swivel range of the chain saw 3443BA007 KN Push the hand guard 1 forwards the saw chain is blocked Simultaneously press the throttle trigger lockout 2 and throttle trigger 3 set master control lever Position cold start If engine is cold even if the engine has stalled during opening of throttle after starting Position warm start If engine is warm once the engine has been running for approx one minute Hold and start the chain saw MS 461 When the engine has turned over for the first time 3443BA013 KN Move the Master Control leve 1 to the position warm start e Press the button on the decompression valve Holdandstartthe chain saw Once the engine is running
30. ges into the felling cut in good time Use only wooden aluminum or plastic wedges Never steel which can damage the chain and cause kickback 10 001BA145 KN The hinge E helps control the falling tree Do not cut through the hinge you could lose control of the direction of fall this could result in an accident Leave a broader hinge on rotten trees Shout a second warning immediately before the tree falls Small diameter trees Simple fan cut z lt n t lt a e Apply the spiked bumper behind the hinge pivot the saw around this point only as far as the hinge The spiked bumper rolls against the trunk MS 461 Large diameter trees Sectioning method 001BA148 KN If the diameter of the tree is greater than the length of the guide bar use the sectioning method 1 First cut Nose of guide bar should enter wood just behind the hinge hold the saw horizontally and swing it as far as possible using the bumper spike as a pivot avoid repositioning the saw more than necessary zZ SE lt ch 3 S When repositioning the saw for the next cut keep the guide bar fully engaged in the kerf to keep the felling cut straight apply the spiked bumper again and so on Insert a wedge 3 in the cut Last cut Apply the spiked bumper as for the simple fan cut do not cut through the hinge Special cutting techniques Plunge cuts
31. gine except when checking its operation and before starting cutting work High revs with the chain brake engaged chain locked will quickly damage the powerhead and chain drive clutch chain brake The chain brake is also activated by the inertia of the front hand guard if the kickback force of the saw is high enough The hand guard is accelerated toward the bar nose even if your left hand is not behind the hand guard e g during felling cut MS 461 The chain brake will operate only if the hand guard has not been modified in any way Check operation of the chain brake Before starting work Run engine at idle speed engage the chain brake push hand guard toward bar nose and open the throttle wide for no more than 3 seconds the chain must not rotate The hand guard must be free from dirt and move freely Chain brake maintenance The chain brake is subject to normal wear It is necessary to have it serviced and maintained regularly by trained personnel STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer Maintain the following servicing intervals Full time usage every 3 months Part time usage every 6 months Occasional usage every 12 months MS 461 Winter Operation Pre heating the carburetor at temperatures below 10 C Zz x oO x o lt cd wo ct Remove the carburetor box cover in the carburetor bo
32. gineering and appearance of our products periodically Therefore some changes modifications and improvements may not be covered in this manual Safety Precautions and Working Techniques Because a chain saw is a high speed wood cutting tool with very sharp cut ters some special safety precautions must be observed in addition to those that generally apply when working with an axe or hand saw It is important you read and understand the instruction manual before using your power tool for the first time and keep the manual in a safe place for future refer ence Non observance of the safety precautions may result in serious or even fatal injury Observe all applicable local safety regulations standards and ordinances If you have not used this type of power tool before Have your dealer or other experienced user show you how to operate your power tool or attend a special course in its operation Minors should never be allowed to use a power tool Keep bystanders especially children and animals away from the work area When the power tool is not in use shut it off so that it does not endanger others Secure it against unauthorized use The user is responsible for avoiding injury to third parties or damage to their property MS 461 Do not lend or rent your power tool without the instruction manual Be sure that anyone using it understands the information contained in this manual The use of noise
33. guard toward the handlebar The chain brake is disengaged With the Quickstop Super chain brake system additionally press the throttle trigger lockout Sharpen frequently removing little material two or three strokes of the file are usually sufficient for simple resharpening 689BA018 KN zZ x o x lt a D e Guide the file horizontally at a right angle to the side surface of the guide bar in accordance with the specified angle according to the MS 461 markings on the file holder rest the file holder on the tooth head and the depth gauge File only from the inside outward The file only sharpens on the forward stroke lift the file on the backstroke Do not file tie straps and drive links Rotate the file a little periodically in order to avoid uneven wear e Toremove file burr use a piece of hardwood e Check angle with file gauge All cutters must be equally long With varying cutter lengths the cutter heights also vary and cause rough running of the saw chain and chain breakage e All cutters must be filed down equal to the length of the shortest cutter ideally one should have this done by a servicing dealer using an electric sharpener Depth gauge setting x 2 a lt a D The depth gauge determines the depth to which the cutter penetrates the wood and thus the chip thickness MS 461 a Required distance between depth gauge and cu
34. hain Tension Anew chain has to be retensioned more often than one that has been in use for some time Check chain tension frequently see chapter on Operating Instructions English Checking Chain Tension Shut off the engine Wear work gloves to protect your hands The chain must fit snugly against the underside of the bar and it must still be possible to pull the chain along the bar by hand If necessary retension the chain Anew chain has to be retensioned more often than one that has been in use for some time Check chain tension frequently see chapter on Operating Instructions 15 English Fuel The engine requires a mixture of gasoline and engine oil A Avoid direct skin contact with and breathing in of gasoline fumes STIHL MotoMix STIHL recommends using STIHL MotoMix This pre blended fuel is free of benzene and lead stands out because of a high octane rating and always provides the proper mixing ratio STIHL MotoMix is blended with STIHL HP Ultra two stroke engine oil for maximum engine life MotoMix is not available in all markets Mixing fuel Unsuitable fuels or a mixing ratio that deviates from the specification can lead to severe engine damage The engine seals fuel lines and fuel tank may be damaged if poor quality gasoline or engine oil is used Gasoline Use only high quality gasoline with an octane rating of at least 90 ROC leaded or unleaded
35. harpening angle are exceptions Ripping chains have an X in the designation B Side plate angle The correct side plate angle results automatically when the specified file holder and file diameter are used Tooth shapes Angle A B Micro semi chisel tooth 30 75 e g 63 PM3 26 RM3 36 RM Super full chisel tooth 30 60 e g 63 PS3 26 RS 36 RS3 Ripping chain e g 10 75 63 PMX 36 RMX The angles must be identical for all cutters in the saw chain Varying angles Rough uneven running of the saw chain increased wear even to the point of saw chain breakage 36 File holder 689BA025 KN e Use a file holder Always use a file holder special accessory see table Sharpening tools when sharpening saw chains by hand File holders have markings for the sharpening angle Use only special saw chain files Other files are unsuitable in terms of shape and type of cutting To check the angles 85 75 U 80 du RN Ee 001BA203 KN STIHL filing gauge special accessory see table Sharpening tools a universal tool for checking sharpening and side plate angles depth gauge setting and tooth length as well as cleaning grooves and oil inlet holes Proper sharpening Select sharpening tools in accordance with chain pitch Clamp guide bar if necessary Block saw chain push the hand guard forward To advance the saw chain pull the hand
36. he saw short distances Also stop the engine before carrying the saw longer distances more than about 50 m Always carry the saw by the front handle handlebar with the hot muffler away from your body the guide bar must point to the rear To avoid serious burn injuries avoid touching hot parts of the machine especially the surface of the muffler Transporting in a vehicle Properly secure your power tool to prevent turnover fuel spillage and damage English Fueling Gasoline is an extremely flammable fuel Keep clear of naked flames Do not spill any fuel do not smoke Always shut off the engine before refueling Do not fuel a hot engine fuel may spill and cause a fire Open the fuel cap carefully to allow any pressure build up in the tank to release slowly and avoid fuel spillage Fuel your power tool only in well ventilated areas If you spill fuel wipe the machine immediately if fuel gets on your clothing change immediately Your power tool comes standard with either a screw type or bayonet type fuel cap After fueling tighten Cs down the screw type fuel cap as securely as A possible n Insert the fuel cap with hinged grip bayonet type cap correctly in the opening turn it clockwise as far as stop and fold the grip down This reduces the risk of unit vibrations causing the fuel cap to loosen or come off and spill quantities of fuel Before starting Check that your
37. in good time to avoid tiredness or exhaustion To reduce risk of fire keep hot exhaust gases and hot muffler away from easily combustible materials e g wood chips bark dry grass fuel Mufflers with a catalytic converter can become particularly hot MS 461 Your power tool produces toxic exhaust fumes as soon as the engine is running These fumes may be colorless and odorless and contain unburned hydrocarbons and benzol Never run the engine indoors or in poorly ventilated loca tions even if your model is equipped with a cata lytic converter To reduce the risk of serious or fatal injury from breathing toxic fumes ensure proper ventilation when working in trenches hollows or other confined locations To reduce the risk of accidents stop work immediately in the event of nausea headache visual disturbances e g reduced field of vision problems with hearing dizziness deterioration in ability to concentrate Apart from other possibilities these symptoms may be caused by an excessively high concentration of exhaust gases in the work area The dusts e g sawdust vapor and smoke produced during operation may be dangerous to health If dust levels are very high wear a suitable respirator Check the saw chain at regular short intervals during operation or immediately if there is a noticeable change in cutting behavior Shut off the engine and wait until the chain comes to a complete stanstill
38. marks on tank cap and fuel tank must line up Press the cap down as far as stop 001BA233 KN A While holding the cap depressed turn it clockwise until it engages in position 2 D N lt a gt Ss The marks on the tank cap and fuel tank are then in alignment 18 001BA235 KN e Fold the grip down so that it is flush with the top ofthe cap 2 lt x lt a Q Tank cap is locked If the tank cap cannot be locked in the fuel tank opening Bottom of cap is twisted in relation to top Remove the cap from the fuel tank and check it from above 001BA238 KN Left Bottom of cap is twisted inner mark 1 in line with outer mark Right Bottom of cap in correct posi tion inner mark is under the grip It is not in line with the outer mark z x N lt ao Ss Ss e Place the cap on the opening and rotate it counterclockwise until it engages the filler neck Continue rotating the cap counterclockwise about a quarter turn this causes the bottom of the cap to be turned to the correct position Turnthe cap clockwise and lock it in position see section on Closing MS 461 Chain Lubricant For automatic and reliable lubrication of the chain and guide bar use only an environmentally compatible quality chain and bar lubricant Rapidly biodegradable STIHL Bioplus is recommended Biological chain oil must be resistant to aging e g
39. n can be given for the length of usage because it depends on several factors The period of usage is prolonged by Hand protection wearing warm gloves Work breaks The period of usage is shortened by Any personal tendency to suffer from poor circulation symptoms frequently cold fingers tingling sensations Low outside temperatures The force with which the handles are held a tight grip restricts circulation Continual and regular users should monitor closely the condition of their hands and fingers If any of the above symptoms appear e g tingling sensation in fingers seek medical advice Maintenance and Repairs Service the machine regularly Do not attempt any maintenance or repair work not described in the instruction manual Have all other work performed by a servicing dealer MS 461 STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information Only use high quality replacement parts in order to avoid the risk of accidents and damage to the machine If you have any questions in this respect consult a servicing dealer STIHL recommends the use of genuine STIHL replacement parts They are specifically designed to match your model and meet your performance requirements To reduc
40. n saw user Use a low kickback chain Work with the saw supported wherever possible Do not stand on the log while limbing it Do not cut with the bar nose Watch for limbs which are under tension Never cut several limbs at once 12 When cutting small logs Use a sturdy and stable support sawhorse Never hold the log with your leg or foot Never allow another person to hold the log or help in any other way Lying or standing logs under tension Always make cuts in the correct sequence first at the compression side 1 then at the tension side 2 the saw may otherwise pinch or kick back risk of injury zZ x n lt a 5 001BA152 KN e Make relieving cut at the compression side 1 Make bucking cut at the tension side 2 Be wary of pushback when making bucking cut from the bottom upwards underbuck Do not cut a lying log at a point where it is touching the ground because the saw chain will otherwise be damaged Ripping cut z x D x ao Cutting technique in which the bumper spike is not used risk of pull in start the cut with the guide bar at the shallowest possible angle take extra care since there is an increased danger of kickback MS 461 Vibrations Prolonged use of the power tool may result in vibration induced circulation problems in the hands whitefinger disease No general recommendatio
41. n your saw so that the gunning sight points in exactly the direction you want the tree to fall There are several approved methods for making the felling notch observe country specific regulations on felling techniques MS 461 001BA143 KN The felling notch C determines the direction of fall STIHL recommends the following method Make the horizontal cut check the direction of fall with the gunning sight Make angle cut at about 45 Check the felling notch and correct it if necessary Important Felling notch at a right angle to the planned direction of fall As close to the ground as possible Cuttoadepth of about 1 5 to 1 3 of the trunk diameter English Sapwood cuts z z o wo lt ao 3S o Sapwood cuts in long fibered softwood help prevent sapwood splintering when the tree falls Make cuts at both sides of the trunk at same height as bottom of felling notch to a depth of about 1 10 of trunk diameter On large diameter trees cut to no more than width of guide bar Do not make sapwood cuts if wood is diseased English Felling zZ x lt di Q Shout a warning before starting the felling cut Make the felling cut D slightly higher than bottom of the felling notch Cut horizontally Leave approx 1 10 of the tree diameter uncut between the felling cut and the felling notch This is the hinge Drive wed
42. nd speed do not fell in high winds Sloping ground Neighboring trees Snow load Soundness of tree take special care if trunk is damaged or in case of deadwood dry decayed orrotted wood z Z o fo lt ao S o A Direction of fall B Escape paths Establish paths of escape for everyone concerned opposite to direction of fall at about 45 Remove all obstacles from escape paths Place all tools and equipment a safe distance away from the tree but not on the escape paths Always keep to the side of the falling tree and only walk away along the preplanned escape path On steep slopes plan escape routes parallel to the slope When walking away along the escape path watch out for falling limbs and watch the top of the tree Preparing work area at base of tree First clear the tree base and work area from interfering limbs and brush to provide a secure footing Clean lower portion of tree base e g with an axe sand stones and other foreign objects will dull the saw chain Aa a Le Le z lt o t lt cd Remove large buttress roots Make the vertical cut first then the horizontal but only if the wood is sound MS 461 Felling notch z 7 B lt a s Ss When making the felling notch make use of the gunning sight on the shroud and fan housing to check the planned direction of fall Positio
43. ne set the master control lever to Stop 0 Position cold start Ifthe engine is cold Ifthe engine stalls during opening of throttle after starting Ifthe fuel tank has run empty engine stalled out Position warm start If engine is warm once the engine has been running for approx one minute When the engine has turned over for the first time After ventilation of the combustion chamber if the engine was flooded Holding the chain saw There are two ways to hold the chain saw during starting MS 461 On the ground 3443BA024 KN e Place the chain saw securely on the ground assume a steady stance the saw chain must not touch any objects and also must not touch the ground With the left hand on handlebar press the chain saw firmly against the ground thumb wrapped around the handlebar Step into the rear handle with the right foot or step on the rear hand guard with the heel of the right foot English Between the knees or thighs Clamp the rear handle between the knees or thighs Grip the handlebar firmly with the left hand thumb wrapped around the handlebar 23 English Starting z x S lt fea cr x x a e With the right hand pull the starter grip slowly until you feel it engage and then give it a brisk strong pull simultaneously press down on the handlebar do not pull the starter rope out all the way risk o
44. oil pump with increased delivery rate can be identified by the groove 2 in the adjusting screw With this oil pump in setting range a the oil tank can run empty before the fuel tank thus causing the saw chain to run dry in setting range a fill the fuel tank only half full or refill the oil tank when the fuel tank is approximately half empty English Taking Care of the Guide Bar 143BA026 KN Flip the bar after each sharpening and each time the chain is changed to avoid uneven wear especially at the sprocket nose and on the bottom Periodically clean the oil inlet hole 1 oil outlet channel 2 and bar groove 3 Measure groove depth using the measuring tool on the file gauge special accessory in the area with the greatest wear 27 English Chain type Chain pitch Minimum groove depth Picco 1 4 P 4 0mm Rapid 1 4 4 0 mm Picco 3 8 P 5 0 mm Rapid 3 8 0 325 6 0 mm Rapid 0 404 7 0 mm If the groove is not at least this deep Replace guide bar Otherwise the drive links will grind against the base of the groove the bottoms of the cutters and the tie straps will not lie against the bar 28 Air Filter System The air filler system can be adapted to different operating conditions by the insertion of different air filters Retrofitting is simple 001BA210 KN e HD2 Filter black filter frame folded filter fabric Universal filter for almost all
45. option Close the filler cap There must still be a small amount of oil in the oil tank when the fuel tank is empty If the oil tank is still partly full the reason may be a problem in the oil supply system Check chain lubrication clean the oil passages contact a servicing dealer if necessary STIHL recommends that maintenance and repair work be carried out only by authorized STIHL dealers 19 English Checking Chain Lubrication z x A L d Gr lt The saw chain must always throw off a small amount of oil Never operate your saw without chain lubrication If the chain runs dry the whole cutting attachment will be irretrievably damaged within a very short time Always check chain lubrication and the oil level in the tank before starting work Every new chain has to be broken in for about 2 to 3 minutes After breaking in the chain check chain tension and adjust if necessary see Checking Chain Tension 20 Chain Brake AO Locking the chain 143BA011 KN in an emergency when starting at idling speed The chain brake is activated by pushing the hand guard toward the bar nose with your left hand or by inertia in certain kickback situations The chain is stopped and locked Releasing the chain brake zZz x SI i lt fea Cr lt Pull the hand guard back toward the front handle Always disengage chain brake before accelerating the en
46. power tool is properly assembled and in good condition refer to appropriate chapters in the instruction manual Check operation of chain brake front hand guard Correctly mounted guide bar Correctly tensioned chain Smooth action of throttle trigger and throttle trigger interlock throttle trigger must return automatically to idle position Master Control lever stop switch must move easily to STOP or 0 Check that the spark plug boot is secure a loose boot may cause arcing that could ignite combustible fumes and cause a fire Never attempt to modify the controls or the safety devices in any way Keep the handles dry and clean free from oil and pitch for safe control of the chain saw To reduce the risk of personal injury do not operate your saw if it is damaged or not properly assembled Starting the engine Start the engine at least 3 meters from the fueling spot outdoors only Place the unit on firm ground in an open area Make sure you have good balance and secure footing Hold the unit securely The cutting attachment must be clear of the ground and all other obstructions because it may begin to run when the engine starts Your chain saw is designed to be operated by one person only Do not allow other persons in the work area even when starting To reduce risk of chain rotation and personal injury lock the chain with the chain brake before starting
47. pter onto the thread and tighten it down firmly to reduce the risk of arcing and fire 31 English Replacing the Starter Rope A and Rewind Spring The rewind spring may pop out and uncoil during this operation take care Removing the Fan Housing to avoid the risk of injury Use a screwdriver to pry the rope out of the starter grip Remove the remaining rope from the rotor and starter grip 219BA019 KN Take out the screws 1 213BA020 KN Push the hand guard upwards zZ D 5 lt ao oO u Pull the underside of the fan housing away from the crankcase Thread the new rope through the and remove it downwards top of the starter grip Thread the end of the rope through the top of the guide bushing 5 and rope rotor 6 and secure it with a simple overhand knot Replacing a broken starter rope Coat the rope rotor bearing bore with non resinous oil Slip the rotor over the starter post 7 turn it back and forth to engage the anchor loop of the rewind spring z lt oO D gt lt oO gt gt Use a screwdriver or suitable pliers to remove the spring clip 2 from the starter post Carefully remove the rope rotor with washer 3 and pawls 4 32 MS 461 001BA096 KN Fit the pawls 4 in the rotor and fit the washer 3 on the starter post Use a screwdriver or suitable pliers to install the spring clip
48. r than normal each day or under difficult conditions 5 v extensive dust highly resinous lumber lumber from tropical trees etc If the machine is only used E 2 occasionally the intervals can be extended accordingly x D o x 3 5 2 2 I E g u Qu sig 3 amp 2 D gt e Jo eee ae g Ss 2 o E 5 Fi 2 o ol Q 3 a a oo 3 3 E gt Cooling air intake slits clean x Cylinder fins clean x x Check idle adjustment chain must not rotate x x Carburetor Setting the idle speed x adjust electrode gap x Spark plug replace after 100 hours operation All PERE screws nuts and bolts not adjusting retighten x screws 1 Spark arresting screen present only in some check x countries clean or replace if necessary x check x Chain catcher replace x decarbonize after 139 hours of operation subse Exhaust bore z x quently after every 150 hours of operation Safety information sticker replace x 1 STIHL recommends STIHL servicing dealers 2 40 During initial use of professional chain saws with a power output of 3 4 kW or more tighten the cylinder block screws after 10 to 20 hours of operation MS 461 Minimize Wear and Avoid Damage Observing the instructions in this manual helps reduce the risk of unnecessary wear and damage to the power tool The power tool must be operated maintained and stored with the due care and attention described in this owner s manual The user i
49. rectly sharpened properly tensioned chain the depth gauge setting must not be too large Use a low kickback chain and a narrow radius guide bar Pull in A 001BA037 KN Pull in occurs when the chain on the bottom of the bar is suddenly pinched caught or encounters a foreign object in the wood The reaction of the chain pulls the saw forward always hold the spiked bumper securely against the tree or limb MS 461 Pushback B z ro 3 lt ao S Pushback occurs when the chain on the top of the bar is suddenly pinched caught or encounters a foreign object in the wood The reaction of the chain drives the saw straight back toward the operator To avoid pushback Bealerttosituations that may cause the top of the guide bar to be pinched Do not twist the guide bar in the cut Exercise extreme caution with leaners with trees that have fallen unfavorably between other trees and are under strain when working in blowdown areas Do not work with the chainsaw in such circumstances Use block and tackle cable winch or tractor Pull out exposed and cleared logs Select clear area for cutting Deadwood dry decayed or rotted wood represents a considerable risk that is difficult to assess Identifying the extent of the dangers is complicated if not impossible Use aids such as a cable winch or tractor in such cases MS 461 When felling in the vi
50. ree tank fillings This avoids unnecessarily high loads during the break in period As all moving parts have to bed in during the break in period the frictional resistances in the shortblock are greater during this period The engine develops its maximum power after about 5 to 15 tank fillings During work Do not make the mixture leaner to achieve an apparent increase in power this could damage the engine see Adjusting the Carburetor Open the throttle only when the chain brake is off Running the engine at high revs with the chain brake engaged chain locked will quickly damage the shortblock and chain drive clutch chain brake Check chain tension frequently A new saw chain must be retensioned more frequently than one that has been in use already for an extended period 26 Chain cold Tension is correct when the chain fits snugly against the underside of the bar but can still be pulled along the bar by hand Retension if necessary see Tensioning the Saw Chain Chain at operating temperature The chain stretches and begins to sag The drive links must not come out of the bar groove on the underside of the bar the chain may otherwise jump off the bar Retension the chain see Tensioning the Saw Chain The chain contracts as it cools down If it is not slackened off it can damage the crankshaft and bearings After a long period of full throttle operation After a long period of full thro
51. reen 3 Clean the dirty spark arresting screen replace if damaged or heavily carbonized Refit the spark arresting screen in reverse order of steps MS 461 Spark Plug If the engine is down on power difficult to start or runs poorly at idle speed first check the spark plug Fit anew spark plug after about 100 operating hours or sooner if the electrodes are badly eroded Install only suppressed spark plugs of the type approved by STIHL see Specifications Removing the spark plug 145BA027 K Turnthe knob above the rear handle in the direction of the arrow and remove the carburetor box cover Zz x DQ oO So lt a lo bd Lift the air baffle 1 up and off Unplug spark plug boot 2 Unscrew spark plug MS 461 English Checking the spark plug Installing the spark plug A 000BA039 KN A amp 5 lt a oO Tt 3 e e Clean dirty spark plug Screw in the spark plug Check electrode gap A and Press on the spark plug boot 1 readjust if necessary see firmly Specifications Insert the air baffle 2 from above Rectify the problems which have e NOLO caused fouling of the spark plug Possible causes are Too much oil in fuel mix Dirty air filter Unfavorable running conditions z x fe I gt lt ao Ss Ifthe spark plug comes with a detachable adapter nut 1 screw the ada
52. rosion and other consequential damage resulting from improper storage Damage to the machine resulting from the use of poor quality replacement parts Parts Subject to Wear and Tear Some parts of the power tool are subject to normal wear and tear even during regular operation in accordance with instructions and depending on the type and duration of use have to be replaced in good time Among other parts this includes Saw chain guide bar Drive components clutch clutch drum chain sprocket Filters air oil fuel Starter mechanism Spark plug Components of antivibration system 41 English Main Parts 6 qa 12 3443BA012 KN 42 Carburetor box cover twist lock Spark plug boot Carburetor adjusting screws Handle heating switch depending on equipment version Chain sprocket cover Chain sprocket Chain brake Chain catcher Chain tensioner Bumper spike Guide bar Oilomatic saw chain Oil filler cap Muffler Front hand guard Front handle handlebar Decompression valve Starter grip Fuel filler cap Master control lever Throttle trigger Throttle trigger lockout Rear handle Rear hand guard Serial number MS 461 Specifications Engine STIHL single cylinder two stroke engine Displacement 76 5 cm Cylinder bore 52 mm Stroke 36 mm Engine power to 4 4 kW 6 HP at ISO 7293 9800 rpm Idle speed 2500 rpm Maximum speed wi
53. rs chains chain sprockets and accessories They are specifically designed to match your model and meet your performance requirements Never attempt to modify your power tool in any way since this may increase the risk of personal injury STIHL excludes all liability for personal injury and damage to property caused while using unauthorized attachments Do not use a pressure washer to clean the unit The solid jet of water may damage parts of the unit Clothing and Equipment Wear proper protective clothing and equipment Clothing must be sturdy but allow complete free dom of movement Wear snug fitting clothing with cut retardant inserts an overall and jacket combi nation do not wear a work coat Avoid clothing that could get caught on branches or brush or moving parts of the machine Do not wear a scarf necktie or jewelry Tie up and confine long hair e g with a hair net cap hard hat etc English Wear steel toed safety boots with cut retardant inserts and non slip soles K Wear a safety hard hat aa where there is a danger of head injuries from fall ing objects LY Wear safety glasses or a face shield and hearing protection e g earplugs or ear muffs Wear heavy duty gloves STIHL offers a comprehensive range of personal protective clothing and equipment Transporting the Chain Saw Always engage the chain brake and fit the chain guard scabbard before carrying t
54. s responsible for all damage caused by non observance of the safety precautions operating and maintenance instructions in this manual This includes in particular Alterations or modifications to the product not approved by STIHL Using tools or accessories which are neither approved or suitable for the product or are of a poor quality Using the product for purposes for which it was not designed Using the product for sports or competitive events Consequential damage caused by continuing to use the product with defective components Maintenance Work All the operations described in the Maintenance Chart must be performed on a regular basis If these maintenance operations cannot be performed by the owner they should be performed by a servicing dealer STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL MS 461 English servicing dealer STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information If these maintenance operations are not carried out as specified the user assumes responsibility for any damage that may occur Among other parts this includes Damage to the engine due to neglect or deficient maintenance e g air and fuel filters incorrect carburetor adjustment or inadequate cleaning of cooling air inlets intake ports cylinder fins Cor
55. sh z x a re i lt ca D e Lay the file gauge on the saw chain the highest point of the depth gauge must be flush with the file After sharpening clean the saw chain thoroughly removing any filings or grinding dust lubricate the saw chain thoroughly Inthe event of extended periods of disuse store saw chains in cleaned and oiled condition Sharpening tools special accessories Round file mm Inches Round file Part number File holder Part number File gauge Part number Taper square file Part number Sharpening set Part number gauge Chain pitch Inches mm 1 4P 6 35 1 4 6 35 3 8 P 9 32 0 325 8 25 3 8 9 32 0 404 10 26 1 38 3 2 4 0 4 0 4 8 5 2 5 5 1 8 5 32 5 32 3 16 13 64 7 32 5605 771 3206 5605 772 4006 5605 772 4006 5605 772 4806 5605 772 5206 5605 772 5506 5605 750 4300 5605 750 4327 5605 750 4327 5605 750 4328 5605 750 4329 5605 750 4330 0000 893 4005 1110 893 4000 1110 893 4000 1110 893 4000 1110 893 4000 1106 893 4000 consisting of file holder with round file taper square file and file gauge 0814 252 3356 0814 252 3356 0814 252 3356 0814 252 3356 0814 252 3356 0814 252 3356 5605 007 1000 5605 007 1027 5605 007 1027 5605 007 1028 5605 007 1029 5605 007 1030 MS 461 English Maintenance and Care
56. th bar and chain 13500 rpm Ignition system Electronic magneto ignition Spark plug Bosch WSR 6 F suppressed NGK BPMR7A Electrode gap 0 5 mm Fuel system All position diaphragm carburetor with integral fuel pump Fuel tank capacity 0 8 Chain lubrication Fully automatic speed controlled oil pump with reciprocating piston additional manual oil flow control Oil tank capacity 0 325 MS 461 Weight dry without bar and chain MS 461 6 7 kg MS 461 with handle heating and carburetor heating 6 8 kg MS 461 Rescue Saw 7 2 kg Cutting attachment MS 461 Rollomatic guide bars Cutting lengths 3 8 40 45 50 63 71 pitch 75 cm Groove width 1 6 mm Saw chains 3 8 Rapid Micro 36 RM Type 3652 Rapid Super 36 RS Type 3621 Rapid Super 3 36 RS3 Type 3626 Pitch 3 8 9 32 mm Drive link gauge 1 6 mm Chain sprockets 7 tooth for 3 8 rim sprocket 7 tooth for 3 8 spur chain sprocket Bar and Chain MS 461 Rescue Saw Rollomatic ES guide bar Cutting lengths 3 8 pitch Groove width 50 cm 1 6 mm English Saw chain 3 8 Rapid Duro R 36 RDR Type 3944 Pitch 3 8 9 32 mm Drive link gauge 1 6mm Chain sprocket 7 tooth for 3 8 rim sprocket Sound and vibration levels The idle full throttle and nominal maximum speed are given equal consideration when calculating sound and vibration levels For further details concerning compliance with the Physical Agents
57. tting edge When cutting softwood outside of the frost season the distance can be increased by up to 0 2 mm 0 008 Chain pitch Depth gauge Distance a Inches mm mm Inches 1 4 P 6 35 0 45 0 018 1 4 6 35 0 65 0 026 3 8 P 9 32 0 65 0 026 0 325 8 25 0 65 0 026 3 8 9 32 0 65 0 026 0 404 10 26 0 80 0 031 Lowering the depth gauges The depth gauge setting is lowered when the cutter is sharpened Check the depth gauge setting after each sharpening 689BA061 KN Lay the appropriate file gauge 1 for the chain pitch on the saw chain and press it against the cutter to be checked if the depth gauge protrudes past the file gauge the depth gauge must be reworked English Saw chains with humped drive link 2 upper part of the humped drive link 2 with service mark is lowered at the same time as the depth gauge of the cutter A The rest of the humped drive link must not be filed otherwise this could increase the tendency of the chain saw to kick back 689BA051 KN Rework the depth gauge so that it is flush with the file gauge zZ x x x lt dd D e Afterwards dress the leading edge ofthe depth gauge parallel to the service mark see arrow when doing this be careful not to further lower the highest point ofthe depth gauge A Depth gauges that are too low increase the kickback tendency of the chain saw 37 Engli
58. ttle operation allow engine to run for a while at idle speed so that the heat in the engine can be dissipated by flow of cooling air This protects engine mounted components ignition carburetor from thermal overload After finishing work Slacken off the chain if you have retensioned it at operating temperature during work Always slacken off the chain again after finishing work The chain contracts as it cools down If it is not slackened off it can damage the crankshaft and bearings Short term storage Wait for engine to cool down Keep the machine with a full tank of fuel in a dry place well away from sources of ignition until you need it again Long term storage See Storing the machine MS 461 Oil Quantity Control Eq En Varying cutting lengths types of wood and working techniques require varying quantities of oil Standard oil pump z x Nn wo lt di iS The oil delivery rate can be adjusted as needed using the adjusting screw 1 on the bottom of the machine Ematic setting E moderate oil delivery rate Turn adjusting screw to E Ematic setting Increase oil delivery rate e Turn the adjusting screw clockwise Reduce oil delivery rate e Turn the adjusting screw counterclockwise The saw chain must always be coated with chain oil MS 461 Oil pump with increased delivery rate available option SE o lt d S iS The
59. work on an insecure support Do not work above shoulder height Never operate your unit with one hand English Begin cutting with the saw at full throttle and engage the spiked bumper firmly in the wood and then continue cutting Never work without the spiked bumper because the saw may pull you forwards and off balance Always hold the spiked bumper securely against the tree or limb Note when reaching the end of a cut that the saw is no longer supported in the kerf You have to take the full weight of the saw since it might otherwise go out of control Felling Do not attempt felling unless you have been trained in the necessary techniques To reduce the risk of accidents and injury do not attempt felling or limbing if you are not an experienced chain saw user Observe all country specific regulations on felling techniques Check that there are no other persons in the felling area other than helpers Make sure no one is endangered by the falling tree the noise of your engine may drown any warning calls lt lt spa e lt a n Maintain a distance of at least 2 1 2 tree lengths from the next felling site Determine direction of fall and escape paths Select gap in stand into which you want the tree to fall Pay special attention to the following points The natural lean of the tree Any unusually heavy limb structure damage The wind direction a
60. x cover move the slide 1 from summer position to winter position 2 Heated air is now drawn in from around the cylinder and mixed with cold air this helps prevent carburetor icing e Attemperatures above 20 C always return the slide to the summer position otherwise risk of engine malfunction due to overheating Air filter system Retrofit new air filter if necessary see Air filter system English At temperatures under 10 C Z x 3 lt Q n Ri De Under extreme winter conditions temperatures below 10 C powdered or drifting snow it is recommended to mount the cover plate special accessory on the fan housing The partial covering of the slits in the fan housing keeps out powdered or drifting snow In case of erratic idling behavior or poor acceleration e Turn the low speed screw L 1 4 turn counterclockwise Whenever the low speed screw L has been adjusted it is usually also necessary to adjust the idle speed screw LA see Setting the carburetor When the cover plate is mounted the slide must be in winter position in the carburetor box cover ifthe chain saw is extremely cold frost formation after starting bring the engine up to operating temperature at increased idle speed disengage chain brake if engine trouble occurs first check whether use of intake air pre heating is necessary 21 English Mounting the cover plate special
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