Yard-Man LT31 Trimmer User Manual
Contents
1. Do not use strong detergents or petroleum based cleaners such as kerosene Some household cleaners contain aromatic oils such as pine and lemon that can damage the plastic housings or handles Wipe off any moisture with a soft cloth STORAGE e Store the unit indoors away from moisture and harmful substances such as fertilizers and solvents e Never store the unit with petrol gasoline in the tank where fumes may reach an open flame or spark e Allow the engine to cool before storing e Store the unit a locked up area to prevent unauthorized use or damage e Store the unit in a dry well ventilated area Store the unit out of the reach of children 16 LONG TERM STORAGE If the unit will be stored for an extended time 1 Drain all fuel from the fuel tank into a container Do not use fuel that has been stored for more than 60 days Dispose of the old fuel in accordance to local regulations 2 Start the engine and allow it to run until it stalls This ensures that all fuel has been drained from the carburettor 3 Allow the engine to cool Remove the spark plug and put 30 ml 1 oz of high quality motor oil into the cylinder Pull the starter rope slowly to distribute the oil Reinstall the spark plug NOTE Remove the spark plug and drain all of the oil from the cylinder before attempting to start the trimmer after storage 4 Thoroughly clean the unit and inspect for any loose or damaged parts Repa2. ae ed ee a hee 7 800 rpm lonion TYP Electronic ignition SWICK a aa Slide Switch Spark Plug ther d adh ee bard ba hale aiea a a dake al ehr 0 5 mm 0 020 in a dae by tae h ied sobs ie jeg Geek Petrol Oil Mixture Petrol Oil Ratio 244 ae en A de a 40 1 Carburetor ea ie Diaphragm All Position ee eens Sahar Auto Rewind eich erates cane et gen Baffled with Guard Throttle Doda ae eae dae Manual Spring Return Fuel TANK Capacity aded ee babes einher hc 444 ml 15 oz DRIVE SHAFT and CUTTING HEAD Drive Shaft aces Rathore IR ae haem an ra erty Bs Steel Tube Throttle Control a a en E a Finger Tip Trigger Approximate Unit Weight No fuel with cutting head guard and D handle 4 5 kg 10 5 Ibs Cutting Mechanism ade ea edad Lean Benni Dual String Cutting Head Line Spogli 234 ch seer hse deat ee bs Bump Line Releaser Line Spool DIAMeter s smaa andre nh earthy ee Pada ae 76 2 mm 3 inches Trimming Line Diameter 4 609 4 2042 40852024 toda ee a ra OWA dee eae ge
3. for spilled fuel Do not start the engine until fuel vapors dissipate NOTE Dispose of the old petrol oil mix in accordance to Federal State and Local regulations STARTING INSTRUCTIONS WARNING Operate this unit only in a well ventilated outdoor area Carbon monoxide exhaust fumes can be lethal in a confined area WARNING Avoid accidental starting Make sure you are in the starting position when pulling the starter rope Figure 7 To avoid serious injury the operator and unit must be in a stable position while starting 1 Mix petrol with oil Fill fuel tank with petrol oil mixture See Oil and Petrol Mixing Instructions 2 Make sure the On Off Stop Control in the ON 1 position Figure 5 3 Fully press and release the primer bulb 10 times slowly Some amount of fuel should be visible in the primer bulb and fuel lines Figure 6 If you can t see fuel in the bulb press and release the bulb as many times as it takes before you can see fuel in it 4 Place the choke lever in Position 1 Figure 6 5 Crouch in the starting position Figure 7 and squeeze the throttle control Pull the starter rope briskly 5 times with the choke lever still in Position 1 6 Place the choke lever in Position 2 7 While squeezing the throttle control pull the starter rope briskly 1 to 3 times to start the engine 8 Keep the throttle squeezed and allow the engine to warm up for 15 to 30 seconds 9 Place the choke lever i
4. personal injury Squeeze the throttle control and check that it returns automatically to the idle position Make all adjustments or repairs before using unit This unit was not designed to be used as a brushcutter Do not attach or operate this unit with any type of brushcutting blade or brushcutting attachment SAFETY WARNINGS FOR PETROL TRIMMERS WARNING Petrol gasoline is highly flammable and its vapors can explode if ignited Take the following precautions Store petrol only in containers specifically designed and approved for the storage of such materials Always stop the engine and allow it to cool before filling the fuel tank Never remove the cap of the fuel tank or add petrol when the engine is hot Never operate the unit without the fuel cap securely in place Loosen the fuel tank cap slowly to relieve any pressure in the tank Add fuel in a clean well ventilated outdoor area where there are no sparks or flames Slowly remove the fuel cap only after stopping engine Do not smoke while fueling or mixing fuel Wipe up any Spilled fuel from the unit immediately Avoid creating a source of ignition for spilled fuel Do not start the engine until fuel vapors dissipate Move the unit at least 9 1 m 30 feet from the fueling source and site before starting the engine Do not smoke keep sparks and open flames from the area while adding fuel or operating the unit WHILE OPERATING Never start or the unit
5. prevent serious personal injury If after checking the fuel mixture and cleaning the air filter the engine still will not idle adjust the idle speed as follows 1 Start the engine and let it run at a high idle fora minute to warm up See Starting Stopping Instructions 2 Release the throttle trigger and let the engine idle If the engine stops insert a small phillips or flat blade screwdriver into the hole in the air filter muffler cover Figure 26 Turn the idle speed screw in clockwise 1 8 of a turn at a time as needed until the engine idles smoothly 3 If the engine appears to be idling too fast turn the idle speed screw out counterclockwise 1 8 of a turn at a time as needed to reduce idle speed NOTE Ifa tachometer is available set idle speed to RPM specifications in Specifications section 14 Checking the fuel mixture cleaning the air filter and adjusting the idle speed should solve most engine problems If not and e engine will not idle e The engine hesitates or stalls on acceleration e There is a loss of engine power Have the carburetor adjusted by an authorized service dealer unit is set down to prevent serious personal injury REPLACING THE SPARK PLUG Use a Champion RD 7Y spark plug or equivalent The correct air gap is 0 5 mm 0 020 in Remove the plug after every 25 hours of operation and check its condition 1 Stop the engine and allow it to cool Grasp the plug wir
6. without the air filter and air filter muffler cover assembly will VOID the warranty Reinstalling the Air filter Muffler Cover 1 Place the air filter muffler cover over the back of the carburetor and muffler NOTE The choke lever must be in Position 2 to install the air filter muffler cover Figure 21 2 Insert the four 4 screws into the holes in the air filter muffler cover and tighten Figure 21 Use a flat blade or 720 Torx bit screwdriver Do not over tighten Do not force CARBURETOR ADJ USTMENT The idle speed of the engine is adjustable through the air filter muffler cover Figure 26 NOTE Careless adjustments can seriously damage your unit An authorized service dealer should make carburetor adjustments Check Fuel Mixture Old and or improperly mixed fuel is usually the reason for the unit not running properly Drain and refill the tank with fresh properly mixed fuel prior to making any adjustm FIGURE 26 Clean Air Filter The condition of the air filter is important to the operation of the unit A dirty air filter will restrict air flow and change the air fuel mixture This is often mistaken for an out of adjustment carburetor Check the condition of the air filter before adjusting the idle speed screw Refer to Air Filter Maintenance Adjusting the Idle Speed WARNING The cutting head will spin during idle speed adjustments Wear protective clothing and observe all safety instructions to
7. 2 03 mm 0 080 inches Cutting Path Diameter Bagchee ea ein Rare dete Be 38 1 cm 15 inches Maximum Vibration Level 11 awe dal ar 1 Wha an eke Roa WEP Da WEE ORO 6 42 m s2 Maximum Vibration Level Racing 0 0 cc ee eee eee tent rennen 9 95 m s2 Maximum Sound Pressure Level 14 chad wand a Ba aan 86 0 LpeqdB A Maximum Sound Pressure Level Racing 101 0 LpeqdB A Method for obtaining level per ISO 7916 Method for obtaining level per ISO 7917 All specifications are based on the latest product information available at the time of printing We reserve the right to make changes at any time without notice 18 SECTION 9 NOTES 19 SECTION 9 NOTES Cont OPERATOR S MANUAL PART NO 769 00828 7 03 PRINTED IN THE USA
8. NG LINE LENGTH The Bump Head cutting head allows you to release trimming line without stopping the engine To release more line lightly tap the cutting head on the ground while operating the trimmer at high speed Figure 9 NOTE Always keep the trimming line fully extended Line release becomes more difficult as cutting line becomes shorter Ga Wh mM FIGURE 9 Each time the head is bumped about 25 4 mm 1 inch of trimming line releases A blade in the cutting head guard will cut the line to the proper length if excess line is released 10 For best results tap the Bump Head on bare ground or hard soil If line release is attempted in tall grass the engine may stall Always keep the trimming line fully extended Line release becomes more difficult as the cutting line becomes shorter NOTE Do not rest the Bump Head on the ground while the unit is running CAUTION Do not remove or alter the line cutting blade assembly Excessive line length will make the unit overheat This may lead to serious personal injury or damage to the unit Some line breakage will occur from e Entanglement with foreign matter e Normal line fatigue e Attempting to cut thick stalky weeds e Forcing the line into objects like walls or fence posts TIPS FOR BEST TRIMMING RESULTS e Keep the cutting head parallel to the ground e Do not force the cutting head Allow the tip of the line to do the cutting especially alon
9. YARD MACHINES A by MTD Operator s Manual LT31 2 Cycle Petrol Trimmer MTD IMPORTANT Read safety rules and instructions carefully before operating equipment PRINTED IN U S A PART NO 769 00828 9 03 TABLE OF CONTENTS Content Page Important Safe Operation Practices i 3 E DOM Your 6 Assembling Your TIMIMIEY 7 Operating Your 8 Maintaining Your TIMET sera een 11 Off Season Stora gered a 16 TOU LSS 1 17 SPECICATION cree oe ee a a a ee ner 18 FINDING MODEL NUMBER This Operator s Manual is an important part of your new trimmer It will help you assemble prepare and maintain the unit for best performance Please read and understand what it says Before you start assembling your new equipment please locate the model plate on the unit and copy the information from it to the space provided below The information on the model plate is very important if you need help from our Customer Support Department or an authorized dealer e Locate the model number on the engine next to the shroud A sample model plate is explained below For future reference please copy the model number and the serial number of the equipment in the space below Model Number serial Number P
10. a building where fumes may reach an open flame or spark Allow the engine to cool before storing or transporting Be sure to secure the unit while transporting Refer to Off Season Storage Store the unit in a dry area locked up or up high to prevent unauthorized use or damage out of the reach of children Never douse or squirt the unit with water or any other liquid Keep handles dry clean and free from debris Clean after each use referring to Off Season Storage Keep these instructions Refer to them often and use them to instruct other users If you loan someone this unit also loan them these instructions SAVE THESE INSTRUCTIONS SAFETY AND INTERNATIONAL SYMBOLS This operator s manual describes safety and international symbols and pictographs that may appear on this product Read the operator s manual for complete safety assembly operating and maintenance and repair information SYMBOL MEANING SYMBOL MEANING e OF SAFETY ALERT SYMBOL Indicates danger warning or caution May be used in conjunction with other symbols or pictographs WARNING READ OPERATOR S MANUAL Read the Operator s Manual s and follow all warnings and safety instructions Failure to do so can result in serious injury to the operator and or bystanders WEAR EYE AND HEARING PROTECTION WARNING Thrown objects and loud noise can cause severe eye injury and hearing loss Wear eye protection meeting ANSI Z87 1 1989 standard
11. ad guard until the screw holes align and the guard fits into the recessed pocket Figure 3 3 Install the four 4 screws with a Phillips screwdriver Figure 4 Cutting Head Guard FIGURE 3 FIGURE 4 SECTION 4 OPERATING YOUR TRIMMER OIL AND PETROL MIXING INSTRUCTIONS Old and or improperly mixed fuel is the main reason for improper unit performance Be sure to use fresh clean unleaded petrol Follow the instructions carefully for the proper petrol oil mixture Definition of Blended Fuels Today s fuels are often a blend of fuel and oxygenates such as ethanol methanol or MTBE ether Alcohol blended petrol absorbs water As little as 1 water in the petrol can make petrol and oil separate It forms acids when stored When using alcohol blended petrol use fresh petrol less than 60 days old Using Blended Fuels If you choose to use a blended petrol or its use is unavoidable follow recommended precautions Always use fresh fuel mix per your operator s manual e Always agitate the fuel mix before fueling the unit e Drain the tank and run the engine dry before storing the unit Using Petrol Additives The bottle of 2 cycle oil that came with your unit contains a petrol additive which will help inhibit corrosion and minimize the formation of gum deposits It is recommended that you use only our 2 cycle oil with this unit If unavailable use a good 2 cycle oil designed for air cooled engines along wi
12. al injury always turn the unit off and allow it to cool before you clean or perform any maintenance on it 1 Place the choke lever in Position 2 Figure 21 NOTE The choke lever must be in Position 2 to remove the air filter muffler cover Figure 21 2 Remove the four 4 screws securing the air filter muffler cover Figure 21 Use a flat blade or 120 Torx bit screwdriver 3 Pull the cover from the engine Do not force Choke Lever Position 2 Screws FIGURE 21 Cleaning the Air Filter WARNING To avoid serious personal injury always turn the unit off and allow it to cool before you clean or perform any maintenance on it 13 Clean and re oil the air filter every 10 hours of operation It is an important item to maintain Failure to maintain the air filter will VOID the warranty 1 Remove air filter muffler cover See Removing the Air filter M uffler Cover Remove the air filter from behind the air filter muffler cover Figure 22 3 Wash the filter in detergent and water Figure 23 Rinse the filter thoroughly Squeeze out excess water Allow it to dry completely 4 Apply enough clean SAE 30 oil to lightly coat the filter Figure 24 5 Squeeze the filter to spread and remove excess oil Figure 25 Air Filter Inside Muffler Cover FIGURE 22 FIGURE 23 FIGURE 24 FIGURE 25 6 Replace the air filter in the air filter muffler cover Figure 22 NOTE Operating the unit
13. arent Part Number Copy the model and parent part number here S N IAA INN INN Copy the serial number here SECTION 1 IMPORTANT SAFE OPERATION PRACTICES NOTE READ ALL INSTRUCTIONS BEFORE OPERATING e e e Read the instructions carefully Be familiar with the controls and proper use of the unit Do not operate this unit when tired ill or under the influence of alcohol drugs or medication Children under the age of 15 must not use the unit teens can use the unit under adult guidance Inspect the unit before use Replace damaged parts Check for petrol leaks Make sure all fasteners are in place and secure Replace cutting head parts that are cracked chipped or damaged in any way Make sure the cutting head is properly installed and securely fastened Be sure the cutting head guard is properly attached and positioned as recommended Failure to do so can result in personal injury to the operator and bystanders as well as damage to the unit Use only 2 03 mm 0 080 inch diameter original equipment replacement line Never use metal reinforced line wire or rope etc These can break off and become a dangerous projectile Be aware of risk of injury to head hands and feet Clear the area to be cut before each use Remove all objects such as rocks broken glass nails wire or string which can be thrown or become entangled in the cutting head Keep childre
14. e firmly and pull the cap from the spark plug 2 Clean dirt from around the spark plug Remove the Spark plug from the cylinder head by turning a 5 8 in socket counterclockwise NOTE Replace cracked fouled or dirty spark plug 3 Set the air gap at 0 5 mm 0 020 in using a feeler gauge Figure 27 WARNING When the unit is turned off make sure the cutting head has stopped before the HAMPIO 0 5 mm 0 020 in FIGURE 27 CAUTION Do not sand blast scrape or clean electrodes Grit in the engine could damage the cylinder 4 Install a correctly gapped spark plug in the cylinder head Tighten by turning the 5 8 in socket clockwise until snug If using a torque wrench torque to 12 3 13 5 Nem 110 120 in elb Do not over tighten SPARK ARRESTOR MAINTENANCE 1 Remove air filter muffler cover Refer to Removing the Air Filter M uffler Cover 2 Locate muffler front and the two 2 bolts securing it to the engine Figure 28 Remove the two 2 bolts using a flatblade screwdriver or 5 16 inch socket or nut driver Pull muffler off of the engine 3 Turn muffler over to the back side and locate the exhaust gasket Remove the muffler exhaust gasket from the muffler Figure 28 Spark Exhaust Arrestor Gasket Muffler Front Side Muffler Back Side FIGURE 28 NOTE If exhaust gasket is torn or damaged replace with a new gasket before reassembling muffler 4 Using a small flatolade scre
15. efore winding split the line back about 6 inches 11 Wind the line in tight even layers in the direction indicated on the inner reel NOTE Failure to wind the line in the direction indicated will cause the cutting attachment to operate incorrectly Single Line ONLY or Single Line FIGURE 15 Single Line Installation 6 Take approximately 7 6 m 25 feet of new trimming line and loop it into two equal lengths Insert each end of the line through one of the two holes in the inner reel Figure 16 Pull the line through the inner Holding Slots reel so that the loop is as small as possible FIGURE 19 12 Insert the ends of the line into the two holding slots Figure 19 13 Insert the ends of the line through the eyelets in the outer spool and place inner reel with spring inside Loop the outer spool Figure 20 Push the inner reel and outer spool together While holding the inner reel and outer spool grasp the ends and pull firmly to release the line from the holding slots in the reel FIGURE 16 7 Wind the lines in tight even layers onto the reel Figure 17 Wind the line in the direction indicated on the inner reel Place your index finger between the two lines to stop the lines from overlapping Do not overlap the ends of the line FIGURE 2 FIGURE 7 Split Line Installation NOTE The spring must be assembled on the inner reel F i i ttach 8 approximately 3 65 12 feet
16. g walls Cutting with more than the tip will reduce cutting efficiency and may overload the engine Cut grass over 200 mm 8 inches by working from top to bottom in small increments to avoid premature line wear or engine drag e Cut from left to right whenever possible Cutting to the right improves the unit s cutting efficiency Clippings are thrown away from the operator e Slowly move the trimmer into and out of the cutting area at the desired height Move either in a forward backward or side to side motion Cutting shorter lengths produces the best results e Trim only when grass and weeds are dry e life of your cutting line is dependent upon e Following the previous trimming techniques e What vegetation is being cut e Where vegetation is cut FIGURE 10 For example the line will wear faster when trimming against a foundation wall as opposed to trimming around a tree DECORATIVE TRIMMING Decorative trimming is accomplished by removing all vegetation around trees posts fences etc Rotate the whole unit so that the cutting head is at a 30 angle to the ground Figure 10 SECTION 5 MAINTAINING YOUR TRIMMER NOTE Some maintenance procedures may require NOTE Maintenance Replacement or Repair of the special tools or skills If you are unsure about emission control devices and system may be these procedures take your unit to an performed by any non road engine repair a
17. inside a closed room or building Breathing exhaust fumes can kill Operate this unit only in a well ventilated area outdoors Wear safety glasses or goggles and ear hearing protection when operating this unit Wear a face or dust mask if the operation is dusty Wear heavy long pants boots gloves and a long sleeve shirt Do not wear loose clothing jewelry short pants sandals or go barefoot Secure hair above shoulder level The cutting head guard must always be in place while operating the unit Do not operate unit without both trimming lines extended and the proper line installed Do not extend the trimming line beyond the length of the guard This unit does not have a clutch The cutting head continues rotating when the engine is idling Have the unit adjusted by an authorized service technician Adjust the D Handle to your size to provide you with the best grip Be sure the cutting head is not in contact with anything before starting the unit Use the unit only in daylight or good artificial light Always hold the unit with both hands when operating Keep a firm grip on both the front and rear handle or grips Avoid accidental starting Be in the starting position whenever pulling the starter rope The operator and unit must be in a stable position while starting Refer to the Starting Stopping Instructions Use the right tool Only use this tool for the purpose in which it was intended Do not overreach Always keep proper f
18. ir or replace damaged parts and tighten loose screws nuts or bolts The unit is ready for storage TRANSPORTING e Allow the engine to cool before transporting e Secure the unit while transporting e Drain the fueltank before transporting e Tighten fuel cap before transporting SECTION 7 TROUBLE SHOOTING GUIDE ENGINE WILL NOT START CAUSE ACTION Empty fuel pea bane eee nds Fill fuel tank with properly mixed fuel Primer bulb wasn t pressed enough Press primer bulb fully and slowly 10 times Engine flooded 1 Use starting procedure with choke lever in the RUN position Old or improperly mixed Drain fuel tank Add fresh fuel mixture Fouled spark plug Replace or clean the spark plug ENGINE WILL NOT IDLE CAUSE ACTION Air Filter is plugged Replace or clean the air filter Old or improperly mixed Drain fuel tank Add fresh fuel mixture Improper carburetor adjustment Adjust carburetor ENGINE WILL NOT ACCELERATE CAUSE ACTION Old or improperly mixed Drain fuel tank Add fresh fuel mixture Improper carburetor adjustment Take to an authorized service dealer for carburetor adjustment ENGINE LACKS POWER OR STALLS WHEN UNDER LOAD CAUSE ACTION Old or improperly mixed Drain fuel
19. n bystanders and pets outside a 15 meter 50 ft radius at a minimum They may still be at risk due to thrown objects Encourage bystanders to wear eye protection If you are approached stop the engine and cutting head immediately This Symbol Points Out Important Safety Information Which If Not Followed Could Endanger The Personal Safety And or Property Of Yourself And Others Read And Follow All Instructions In This Manual Before Attempting To Operate Your Cultivator FailureTo Comply With These Instructions May Result In Personal Injury When You See This Symbol Heed Its Warning SAFETY ALERT SYMBOL Indicates danger warning or caution Attention is required in order to avoid serious personal injury May be used in conjunction with other symbols or pictographs Advises you of information or instructions vital to the operation or maintenance of the equipment DANGER Failure to obey a safety warning will result in serious injury to yourself or to others Always follow the safety precautions to reduce the risk of fire electric shock and personal injury WARNING Failure to obey a Safety warning can result in injury to yourself and others Always follow the safety precautions to reduce the risk of fire electric shock and personal injury CAUTION Failure to obey a safety warning may result in property damage or personal injury to yourself or to others Always follow the safety precautions to reduce the risk of fire electric shock and
20. n Position 3 The unit is ready for use IF The engine does not start go back to step 3 IF The engine fails to start after a couple attempts place the choke lever in Position 3 and squeeze the throttle control Pull the starter rope briskly 3 to 8 times The engine should start If not repeat IF WARM If the engine is already warm make sure the On Off Stop control is in the ON position and start the unit with the choke lever in Position 2 After the unit starts move the choke lever to Position 3 STOPPING INSTRUCTIONS 1 Release your hand from the throttle control Allow the engine to cool down by idling 2 Put the ignition switch in the OFF position lt A nr FIGURE 5 Position 1 Starter Rope FIGURE 7 Ignition Switch Position 3 Choke Lever Primer Bulb HOLDING THE TRIMMER WARNING Always wear eye hearing foot and body protection to reduce the risk of injury when operating this unit Before using the unit stand in the operating position Figure 8 Check for the following e The operator is wearing eye protection and proper clothing e With a slightly bent right arm the operator s hand is holding the shaft grip e The operator s left arm is straight his hand holding the D handle e The unit is at waist level e The cutting attachment is parallel to the ground and easily contacts the grass without the need to bend over FIGURE 8 ADJ USTING TRIMMI
21. of new trimming es moing gie line Insert one end of the line through one of the two 14 Hold the inner reel in place and install the bump holes in the inner reel Figure 18 Pull the line through knob by turning clockwise Tighten securely the inner reel until only about 4 inches is left out 9 Insert the end of the line into the open hole in the inner reel and pull the line tight to make the loop as small as possible Figure 18 12 INSTALLING A PREWOUND REEL 1 Hold the outer spool with one hand and unscrew the bump knob counterclockwise Figure 11 Inspect the bolt inside the bump knob to make sure it moves freely Replace the bump knob if damaged 2 Remove the old inner reel from the outer spool Figure 12 3 Remove the spring from the old inner reel Figure 12 4 Place the spring in the new inner reel NOTE The spring must be assembled on the inner reel before reassembling the cutting head 5 Insert the ends of the line through the eyelets in the outer spool Figure 20 6 Place the new inner reel inside the outer spool Push the inner reel and outer spool together While holding the inner reel and outer spool grasp each of the ends and pull firmly to release the line from the holding slots in the spool 7 Hold the inner reel in place and install the bump knob by turning clockwise Tighten securely AIR FILTER MAINTENANCE Removing the Air Filter Muffler Cover WARNING To avoid serious person
22. on Always use original equipment 2 03 mm 0 080 inch replacement line Line other than specified may make the engine overheat or fail WARNING Never use metal reinforced line wire or rope These can break off and become dangerous projectiles There are two methods to replace the trimming line e Wind the inner reel with new line Install a prewound inner reel Winding the Existing Inner Reel 1 Hold the outer spool with one hand and unscrew the bump knob counterclockwise Figure 11 Inspect the bolt inside the bump knob to make sure it moves freely Replace the bump knob if damaged Outer Spool Outer Spool FIGURE B a 5 Check the indexing teeth on the inner reel and outer spool for wear Figure 14 If necessary remove burrs or replace the reel and spool Bump Knob Indexing Teeth Inner Reel FIGURE 1 2 Remove the inner reel from the outer spool Figure 12 3 Remove spring from the inner reel Figure 12 4 Use a clean cloth to wipe the the inner reel spring shaft and inner surface of the outer spool Figure 13 FIGURE 14 11 NOTE Split Line can only be used with the inner reel containing the slotted holes Single line can be used on either type of inner reel Use Figure 15 to identify the inner reel you have Loop NOTE Always use the correct line length when installing trimming line on the unit The line may not release properly if the line is too long FIGURE 18 10 B
23. ooting and balance while operating unit Keep hands face and feet at a distance from all moving parts Do not touch or try to stop the cutting head when it is rotating Do not touch the engine gear housing or muffler These parts get extremely hot from operation When turned off they remain hot for a short time Do not operate the engine faster than the speed needed to cut trim or edge Do not run the engine at high speed when not cutting Always stop the engine when cutting is delayed or when walking from one cutting location to another If you strike or become entangled with a foreign object stop the engine immediately and check for damage Do not operate before repairing damage Do not operate the unit with loose or damaged parts Stop the unit switch the engine to off and disconnect the spark plug wire for maintenance or repair Use only original equipment replacement parts and accessories for this unit These are available from your authorized service dealer Use of any non MTD parts or accessories could lead to serious injury to the user or damage to the unit and void your warranty Keep unit clean of vegetation and other materials They may become lodged between the cutting head and guard To reduce fire hazard replace faulty muffler and Spark arrestor keep the engine and muffler free from grass leaves excessive grease or carbon build up OTHER SAFETY WARNINGS e Never store the unit with fuel in the tank inside
24. rees fences etc D handle Ignition Switch Throttle Primer Bulb Spark Plug Air Filter Muffler Cover Line Cutting Blade ae N g Head Guard pP 0 lt x Cutting Head Srey SECTION 3 ASSEMBLING YOUR TRIMMER INSTALLING AND ADJ USTING THE D HANDLE 1 Push the D handle down onto the shaft tube so that the handle slants towards the shaft grip Figure 1 The squared bolt hole in the handle is to the right 2 Insert the shoulder bolt into the squared hole in the handle Place the washer on the bolt and screw the wing nut onto the bolt Do not tighten until you make the handle adjustment 3 Rotate the D handle to place the grip above the top of the shaft tube Place it a minimum of 15 24 cm 6 inches from the end of the shaft grip 4 While holding the unit in the operating position position the D handle to the location that provides you the best grip Figure 2 5 Tighten the wing nut until the D handle is secure Shaft Gri ee D Handle Shaft Tube we Tighten g Wing oes Nut Washer 15 24 cm 6 inches Minimum FIGURE 2 INSTALLING THE CUTTING HEAD GUARD WARNING To avoid serious personal injury never operate the trimmer without the cutting head guard in place 1 Place the cutting head guard onto the shaft tube above the clamp assembly Figure 3 2 Push the cutting guard down to the top of the cutting head assembly and then rotate the cutting he
25. s and ear protection when operating this unit Use a full face shield when needed KEEP BYSTANDERS AWAY WARNING Keep all bystanders especially children and pets at least 50 feet 15 m from the operating area e PRIMER Push primer bulb fully and slowly 10 times UNLEADED PETROL Always use clean fresh unleaded petrol OIL Refer to operator s manual for the proper type of oil e THROWN OBJ ECTS CAN CAUSE SEVERE INJ URY WARNING Keep clear of blower outlet Never point the blower at yourself or others Objects can be thrown from blower Do not operate unit without proper attachments and guards in place e ON OFF STOP CONTROL ON START RUN ON OFF STOP CONTROL OFF or STOP HOT SURFACE WARNING Do not touch a hot muffler or cylinder You may get burned These parts get extremely hot from operation They remain hot for a short time even after the unit is turned off SHARP BLADE WARNING Sharp blade on cutting head guard To prevent serious injury do not touch line cutting blade e CHOKE CONTROL FULL choke position PARTIAL choke position RUN position WNP DO NOT USE BLADES WARNING To prevent serious personal injury do not attach or operate the unit with any type of blade SECTION 2 KNOW YOUR TRIMMER APPLICATIONS Fuel A tri Starter Cap s a trimmer Rope Grip e Cutting grass and light weeds e Edging e Decorative trimming around t
26. tank Add fresh fuel mixture Improper carburetor adjustment Take to an authorized service dealer for carburetor adjustment CUTTING HEAD WILL NOT ADVANCE LINE CAUSE ACTION Cutting head bound with grass Stop the engine and clean cutting head Cutting head out of line Refill with new line Inner reel bound Up Replace the inner reel Cutting head dirty sanira daianto a uia Clean inner reel and outer spool Line welded Sek gs bate ae gh alae Disassemble remove the welded section and rewind the line Line twisted when refilled Disassemble and rewind the line Not enough line is exposed Push the bump knob and pull out line until 102 mm 4 inches of line is outside of the cutting head If further assistance is required contact your authorized service dealer 17 SECTION 8 SPECIFICATIONS ENGINE Engine Ha ea bad Air Cooled 2 Cycle SIO KS u er aaa Yu al a a fata etched ip en cae 31 75 mm 1 25 in Displacement sbarrati ad bead ba cea edb Reade bend ben eae 31 cc 1 9 cu in Clutch Type shes step cate onto A a pee aC ya Ae sah a Bap None idle Speed RPM 24 4 44420 tesa an nee ne a Des 3 200 4 400 rpm Operating RPM esos Aa bay ahs Gea a a eee ee
27. th a petrol additive such as STA BIL petrol stabilizer or an equivalent Add 23 ml 0 8 02 of petrol additive per gallon of petrol according to the instructions on the container NEVER add petrol additives directly to the unit s petrol tank CAUTION For proper engine operation and maximum reliability pay strict attention to the oil and petrol mixing instructions on the 2 cycle oil container Using improperly mixed fuel can severely damage the engine Thoroughly mix the proper ratio of 2 cycle engine oil with unleaded petrol in a separate petrol can Use a 40 1 petrol oil ratio Do not mix them directly in the engine fuel tank See the table below for specific petrol and oil mixing ratios NOTE 3 8 liters 1 gallon of unleaded petrol mixed with one 95 ml 3 2 oz bottle of 2 cycle oil makes a 40 1 petrol oil ratio ed mm UNLEADED PETROL 2 CYCLE OIL 3 8 LITERS 95 ml 1 GALLON US 3 2 FL OZ MIXING RATIO 40 1 WARNING Petrol is extremely flammable Ignited vapors may explode Always stop the engine and allow it to cool before filling the fuel tank Do not smoke while filling the tank Keep sparks and open flames at distance from the area WARNING Remove fuel cap slowly to avoid injury from fuel spray Never operate the unit without the fuel cap securely in place WARNING Add fuel in a clean well ventilated outdoor area Wipe up any spilled fuel immediately Avoid creating a source of ignition
28. uthorized service dealer establishment individual or authorized service MAINTENANCE SCHEDULE dealer In order to assure peak performance of your engine inspection of the engine exhaust port may be necessary after 50 hours of operation If you notice lost RPM poor performance or general lack of acceleration this service These required maintenance procedures should be performed at the frequency stated in the table They should also be included as part of any seasonal tune up WARNING To prevent serious injury never may be required If you feel your engine is need of this perform maintenance or repairs with unit inspection refer service to an authorized servicing dealer or running Always perform maintenance and establishment for repair DO NOT attempt to perform this repairs on a cool unit Disconnect spark plug process yourself as engine damage may result from wire to ensure the unit will not start contaminants involved in the cleaning process for the port FREQUENCY MAINTENANCE REQUIRED REFER TO Before Starting Engine Fill fuel tank with correct oil and petrol mixture Every 10 Hours Clean and re oil air filter Every 25 Hours Check and clean spark arrestor Page 15 Check spark plug condition and gap Page 14 Every 50 Hours Inspect exhaust port and spark arrestor screen for clogging Page 15 or obstruction to assure maximum performance levels LINE INSTALLATION This section covers both Split Line and standard single line installati
29. wdriver carefully pry up the spark arrestor from the recessed hole Figure 29 9 Remove the spark arrestor from the muffler 5 Clean the spark arrestor with a wire brush Replace if it is damaged or unable to thoroughly clean Figure 29 6 Reinstall the spark arrestor by pressing it into the recessed hole on muffler s back side Make sure it fits tightly against the muffler and does not protrude 15 Spark Arrestor Flatblade Ja Screwdriver Spark Arrestor Muffler Back Side FIGURE 29 Place the exhaust gasket against the muffler s back side Align exhaust gasket bolt holes with the bolt holes in muffler While holding the exhaust gasket in place insert bolts into muffler s front side Figure 28 Place muffler with exhaust gasket in place and bolts inserted against the engine aligning the bolt holes Tighten the bolts to secure muffler to the engine If using a torque wrench torque to 80 90 in elb 9 10 2 Nem WARNING If muffler is not tightened securely it could fall off and cause damage to the unit and possibly inflict serious personal injury Reinstall the air filter muffler cover SECTION 6 OFF SEASON STORAGE CLEANING THE UNIT WARNING To avoid serious personal A injury always turn the unit off and allow it to cool before you clean or perform any maintenance on it e Use a small brush to clean off the outside of the unit and to keep the air vents free of obstructions
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