Operator`s Manual
Contents
1. e Turn the low speed screw L clockwise as far as stop then turn it back 3 4 turn HS 45 Adjusting Idle Speed e Carry out the standard setting e Start and warm up the engine quali LA 253BA016 KN Adjust idle speed with the idle speed screw LA so that the cutting blades do not run Engine stops while idling e Turn the idle speed screw LA slowly clockwise until the engine runs smoothly the cutting blades must not run Cutting blades run when engine is idling e Turn the idle speed screw LA counterclockwise until the cutting blades stop moving then turn it another 1 2 to 1 turn in the same direction A warninG Ifthe cutting blades continue moving when the engine is idling have your power tool checked and repaired by your servicing dealer Erratic idling behavior poor acceleration despite correction to setting of LA screw Idle setting is too lean English e Turn the low speed screw L slowly counterclockwise until the engine runs and accelerates smoothly It is usually necessary to change the setting of the idle speed screw LA after every correction to the low speed screw L Fine Tuning for Operation at High Altitude A slight correction of the setting may be necessary if engine does not run satisfactorily Carry out the standard setting e Warm up the engine e Turn high speed screw H slightly c2. e The file only sharpens on the forward stroke lift it off the blade on the backstroke e Use a whetstone to remove burr from cutting edge e Remove as little material as possible e After sharpening clean away filing or grinding dust and then spray the cutting blades with STIHL resin solvent Elore Do not operate your machine with dull or damaged cutting blades This may cause overload and will give unsatisfactory cutting results Inspections and Maintenance by Dealer Maintenance Work STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer Fuel Pickup Body in Tank e Have the pickup body in the fuel tank replaced every year Spark Arrestor in Muffler e Ifthe engine is low on power have your dealer check the spark arrestor country specific option in the muffler HS 45 Maintenance and Care English The following intervals apply to normal operating conditions only If your daily work ing time is longer or operating conditions are difficult very dusty work area etc T a shorten the specified intervals accordingly 5 3 E x 2 3 o 10 S 2 a E E 2 3 E E 8 2 O Sa A o D E gt al 5 gt S E 5 gt 8 5 8 5 9 9 S a 3 5 a 3 E Visual inspection condition leaks
3. Check condition and tightness look for cracks Check sharpness To reduce the risk of fire always clean plant residue chips leaves and excess lubricant off the engine and muffler After Finishing Work Always clean dust and dirt off the machine do not use any grease solvents for this purpose Spray the blades with STIHL resin solvent Run the engine briefly to ensure that the solvent is evenly distributed Vibrations Prolonged use of the power tool may result in vibration induced circulation problems in the hands whitefinger disease No general recommendation 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 HS 45 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 STIHL
4. English Guide to Using this Manual Pictograms The meanings of the pictograms attached to the machine are explained in this manual Depending on the model concerned the following pictograms may be attached to your machine mi y Operate manual fuel pump EH gt Fuel tank fuel mixture of gasoline and engine oil Filler hole for gear lubricant Blade lock OO gt OG Symbols in text WARNING Warning where there is a risk of an accident or personal injury or serious damage to property Rotating handle Elore 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 engineering and appearance of our products periodically Therefore some changes modifications and improvements may not be covered in this manual Safety Precautions and Working Techniques Special safety precau tions must be observed when working with this power tool because it has very sharp high speed cutting blades It is important that you read the instruction man ual before first use and keep it in a safe place for future reference Non observance of the instruction manual 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 bef
5. STIHL recommends the use of STIHL MotoMix This ready to use fuel mix contains no benzol or lead has a high octane rating and ensures that you always use the right mix ratio STIHL MotoMix uses STIHL HP Ultra two stroke engine oil for an extra long engine life MotoMix is not available in all markets Mixing Fuel Elon Unsuitable fuels or lubricants or mix ratios other than those specified may result in serious damage to the engine Poor quality gasoline or engine oil may damage the engine sealing rings hoses and the fuel tank Gasoline Use only high quality brand name gasoline with a minimum octane rating of 90 leaded or unleaded HS 45 If your machine is equipped with a catalytic converter you must use unleaded gasoline liere A few tankfuls of leaded gasoline will greatly reduce the efficiency of the catalytic converter Gasoline with an ethanol content of more than 10 can cause running problems in engines with a manually adjustable carburetor and should not be used in such engines Engines equipped with M Tronic deliver full power when run on gasoline with an ethanol content of up to 25 E25 Engine oil Use only high quality two stroke engine oil preferably STIHL HP HP Super or HP Ultra which are specially formulated for use in STIHL engines HP Ultra guarantees high performance and a long engine life These engine oils are not available in all markets Use only STIHL 50 1 two s
6. hedges shrubs scrub and similar materials Do not use your power tool for any other purpose because of the increased risk of accidents It must not be used for any other purpose because of the increased risk of accidents and damage to the machine Never attempt to modify your power tool in any way since this may result in accidents or damage to the machine Only use cutting blades and accessories that are explicitly approved for this power tool by STIHL or are technically identical If you have any questions in this respect consult a servicing dealer HS 45 Use only high quality tools and accessories in order to avoid the risk of accidents and damage to the machine STIHL recommends the use of genuine STIHL tools and accessories They are specifically designed to match the product and meet your performance requirements Never attempt to modify your machine 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 an overall and jacket combi nation do not wear a work coat Avoid clothing that could get caught on branches or
7. before it breaks completely STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer 15 English Storing the Machine For periods of 3 months or longer 16 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 Clean the cutting blades check condition and spray with STIHL resin solvent Fit the blade scabbard Thoroughly clean the machine pay special attention to the cylinder fins and air filter Store the machine in a dry and safe location use the ring integrated in the rear handle out of the reach of children and other unauthorized persons Sharpening Instructions When cutting performance and behavior begin to deteriorate i e blades frequently snag on branches Resharpen the cutting blades It is best to have the cutting blades resharpened by a dealer on a workshop sharpener STIHL recommends a STIHL servicing dealer It is also possible to use a flat crosscut sharpening file Hold the sharpening file at the prescribed angle see Specifications e Only sharpen the cutting edge do not file blunt projecting parts of the cutting blade or the cutting blade guard see Main Parts and Controls e Always file towards the cutting edge
8. 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 Wear sturdy shoes with non slip soles English warnine To reduce the risk of eye injuries wear close fit OZ ting safety glasses in accordance with Euro tag pean Standard EN 166 Make sure the safety glasses are a snug fit Wear hearing protection e g earplugs or ear muffs Wear heavy duty work gloves made of durable material e g leather STIHL offers a comprehensive range of personal protective clothing and equipment Transporting the Power Tool Always turn off the engine Always fit the blade guard scabbard before carrying your hedge trimmer short distances Carry the power tool by the handle cutting blades behind you Avoid touching hot parts of the machine especially the muffler and gear housing you could suffer serious burns Transporting by 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 venti
9. 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 HS 45 To reduce 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 O 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 ofthe 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 To reduce the risk of fire and damage to hearing do not operate your machine if
10. 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 English Using the Unit Cutting Season Observe country specific or municipal rules and regulations for cutting hedges Do not use your power tool during other people s normal rest periods Cutting Sequence Use lopping shears or a chain saw to cut out thick branches first Cut both sides of the hedge first then the top Disposal Do not throw cuttings in the garbage can they can be composted English Working Technique Vertical Cut 442BA013 KN Swing the cutting blade from the bottom upwards in an arc lower the nose of the blade move along the hedge and then swing the blade up again in an arc Any working position above head height is tiring To minimize the risk of accidents work in such positions for short periods only Horizontal Cut rl 0 Wa Ong Y AGAN d OS ADO 9 JO Hold the cutter bar at an angle of 0 to 10 as you swing the hedge trimmer horizontally Swing the cutting blade in an arc towards the outside of the hedge so that the cuttings are swept to the ground Fuel Your engine requires a mixture of gasoline and engine oil WARNING For health reasons avoid direct skin contact with gasoline and avoid inhaling gasoline vapor STIHL MotoMix
11. REAS STIHL AG amp Co KG Badstr 115 D 71336 Waiblingen confirms that the product described below Category Hedge trimmer Make STIHL Model HS 45 Serial identification 4228 Displacement 27 2 cc conforms to the provisions of Directives 2006 42 EC 2004 108 EC and 2000 14 EC and has been developed and manufactured in compliance with the following standards in the versions valid at the time of production EN ISO 10517 EN 55012 EN 61000 6 1 The measured and guaranteed sound power levels were determined according to Directive 2000 14 EC Annex V using the ISO 11094 standard Measured sound power level 102 dB A Guaranteed sound power level 104 dB A Technical documents deposited at ANDREAS STIHL AG amp Co KG Produktzulassung Product Licensing The year of manufacture and serial number are applied to the product HS 45 Done at Waiblingen 20 08 2014 ANDREAS STIHL AG amp Co KG Lo m Ss Thomas Elsner Director Group Product Management CE HS 45 English 23 English 24 HS 45 0458 253 0121 B englisch 458 253 0121 B
12. STIHL HS 45 STIHL Instruction Manual Contents Guide to Using this Manual Safety Precautions and Working Techniques Using the Unit Fuel Fueling Starting Stopping the Engine Operating Instructions Cleaning the Air Filter Adjusting the Carburetor Spark Plug Engine Running Behavior Lubricating the Gearbox Rewind Starter Storing the Machine Sharpening Instructions Inspections and Maintenance by Dealer Maintenance and Care Original Instruction Manual Main Parts Specifications Maintenance and Repairs Disposal EC Declaration of Conformity Printing inks contain vegetable oils paper can be recycled Printed on chlorine free paper ANDREAS STIHL AG amp Co KG 2014 0458 253 0121 B VA7 L14 0000006574_006_GB STIHL HS 45 Minimize Wear and Avoid Damage 10 10 12 12 13 14 15 15 15 16 16 16 17 19 20 21 22 22 22 English Dear Customer Thank you for choosing a quality engineered STIHL product It has been built using modern production techniques and comprehensive quality assurance Every effort has been made to ensure your satisfaction and troublefree use of the product Please contact your dealer or our sales company if you have any queries concerning this product Your dis Dr Nikolas Stihl This instruction manual is protected by copyright All rights reserved especially the rights to reproduce translate and process with electronic systems
13. abels Replace x 1 STIHL recommends an authorized STIHL servicing dealer 2 not in all versions market specific 18 HS 45 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 is 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 HS 45 English servicing dealer STIHL dealers are regularly given the opportunity to attend training courses and are suppli
14. age and then give it a brisk strong pull once Do nat pull out the starter rope all the way it might otherwise break e Donot let the starter grip snap back Guide it slowly back into the housing so that the starter rope can rewind properly HS 45 If the engine is cold choke set to J e Pull the starter rope five times e Setchoke lever to and continue cranking until the engine runs If conditions are unfavorable and the engine does not start after 10 pulls with the choke lever set to t e Set choke to lt and pull starter rope five times Set choke to and continue cranking If the engine is warm choke set to 1 Continue cranking until the engine runs As Soon as Engine Runs e Blip the throttle trigger the engine settles down to idle speed If the engine stops during warm up or acceleration e Repeat the starting procedure as described under If the engine is cold Awarnine Make sure the carburetor is correctly adjusted The cutting blades must not move when the engine is idling Your machine is now ready for operation Stopping the Engine e Move the stop switch to O HS 45 Other Hints on Starting If the engine does not start e Make sure all settings are correct choke shutter throttle trigger in starting throttle position stop switch to I e Repeat the starting procedure If the engine still does not start e Remove the spark plug see Spark P
15. ard scabbard HS 45 Specifications Engine STIHL single cylinder two stroke engine Displacement 27 2 cc Bore 34 mm Stroke 30 mm Engine power to 0 75 kW ISO 7293 1 1 bhp at 8 500 rpm Idle speed 2 800 rpm Cut off speed 10 300 rpm Ignition System Electronic magneto ignition Bosch WSR 6 F NGK BPMR7 A 0 5 mm Spark plug resistor type Electrode gap Fuel System All position diaphragm carburetor with integral fuel pump Fuel tank capacity 225 cc 0 225 Weight complete with cutting attachment dry 450 mm blade 4 7 kg 600 mm blade 5 0 kg HS 45 English Cutting blades For information on compliance with the REACH regulation EC No 1907 2006 see www stihl com reach Sharpening angle to horizontal 35 Noise and Vibration Data For further details on compliance with Vibration Directive 2002 44 EC see www stihl com vib Sound pressure level L to ISO 22868 450 mm blade 600 mm blade 97 dB A 97 dB A Sound power level Ly to ISO 22868 450 mm blade 107 dB A 600 mm blade 107 dB A Vibration measurement apy eq to ISO 22867 Handle Handle left right 450 mm blade 10 0 m s 9 0 m s 600 mm blade 10 0 m s 9 0 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 REACH REACH is an EC regulatio
16. e blades Take particular care when cutting hedges next to or against wire fences To avoid the risk of electrocution do not touch electric power lines never cut through electric power lines Do not touch the cutting blades while the motor is running If the cutting blades become jammed by thick branches or other obstructions switch off the engine immedi ately before attempting to free the blades there is otherwise a risk of injury Opening the throttle while the blades are blocked increases the load and reduces engine speed The clutch then slips continuously and this causes overheating and damage to important components e g clutch polymer housing components and this can increase the risk of injury from the cutting blades moving while the engine is idling If the hedge is very dusty or dirty spray the blades with STIHL resin solvent from time to time during cutting This helps reduce blade friction as well as the aggressive effects of sap and the build up of dirt particles The dust that occurs during operation may be harmful to health If dust levels are very high wear a suitable respirator Before leaving the power tool unattended Shut off the engine Check the cutting blades at regular short intervals during operation or immediately if there is a noticeable change in cutting behavior Shut off the engine Wait until the cutting blades have come to a complete standstill
17. ed 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 Corrosion 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 Cutting blades Clutch Filters air fuel Rewind starter Spark plug Components of antivibration system 19 English Main Parts ZIZZTE TEN Ze 20 253BA026 KN ONOahWHND Rear handle Throttle trigger lockout Throttle trigger Fuel tank Air filter cover Carburetor adjusting screws Twist lock Front handle Stop switch Starting throttle lock Starter grip Fuel filler cap Muffler Spark plug boot Manual fuel pump Choke lever Cutter guard Cutting blades Blade gu
18. educe 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 English Operate your power tool so that it produces a minimum of noise and emissions do not run the engine unnecessarily accelerate the engine only when working 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 consult your servicing dealer Do not operate your power tool in the starting throttle position engine speed cannot be controlled in this position Inspect the hedge and work area to avoid damaging the cutting blades Remove stones rocks pieces of metal and other solid objects When working close to the ground make sure that no sand grit or stones get between th
19. h combination e Pressthe spark plug boot firmly HS 45 Engine Running Behavior If engine running behavior is unsatisfactory even though the air filter is clean and the carburetor is properly adjusted the cause may be the muffler Have the muffler checked for contamination carbonization by your servicing dealer STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer HS 45 Lubricating the Gearbox Use STIHL gear lubricant for hedge trimmers special accessory to lubricate the blade drive gear 253BA025 KN After about 50 hours of operation e Remove the screw plug 1 from the gearbox e Screw the tube of grease 2 into the filler hole Squeeze up to 5 g grease into the gearbox B norice Do not completely fill the gearbox with grease Remove the tube of grease 2 e Refit the filler plug and tighten it down firmly English Rewind Starter To help prolong the wear life of the starter rope observe the following points e Pull the starter rope only in the direction specified e Donot pull the rope over the edge of the guide bushing e Do not pull out the rope more than specified e Donot allow the starter grip to snap back guide it back into the housing slowly see chapter on Starting Stopping the Engine Have a damaged starter rope replaced by your dealer
20. heel effect The gearbox becomes hot during operation To reduce the risk of burn injury do not touch the gearbox housing Take special care in slippery conditions ice wet ground snow on slopes or uneven ground Clear away fallen branches scrub and cuttings Watch out for obstacles Roots and tree stumps which could cause you to trip or stumble Make sure you always have good balance and secure footing When working at heights Always use a lift bucket Never work on a ladder or in a tree Never work on an insecure support Never operate your power tool with one hand English 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 in good time to avoid tiredness or exhaustion Work calmly and carefully in daylight conditions and only when visibility is good Stay alert so as not to endanger others 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 r
21. ignition until you need it again For longer out of service periods see Storing the Machine 12 Cleaning the Air Filter If there is a noticeable loss of engine power Zz x Q o lt a m o N e Move the choke lever to Press in the tab 1 and swing the filter cover 2 down Clean away loose dirt from around the filter zZ x 8 lt a Ge pre N Remove the foam element 3 and felt element 4 Wash the foam element in a clean non flammable solution e g soapy water and then dry Fit a new felt element As a temporary measure you can knock it out on the palm of your hand or blow it out with compressed air Do not wash Replace any damaged parts Fit the foam element 3 in the filter cover 2 and the felt element 4 in the filter housing 5 Close the filter cover so that it snaps into position HS 45 Adjusting the Carburetor General Information The carburetor comes from the factory with a standard setting This setting provides an optimum fuel air mixture under most operating conditions Preparations Shut off the engine e Check the air filter and clean or replace if necessary e Inspect cutting blades and clean if necessary clean move freely not warped Standard Setting fi TIL Ar e Turn high speed screw H counterclockwise as far as stop no more than 3 4 turn 253BA018 KN
22. lated 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 down the screw type fuel fi x cap as securely as possible 5 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 To reduce the risk of serious or fatal burn injuries check for fuel leakage If fuel leakage is found do not start or run the engine until leak is fixed Before Starting Check that your power tool is properly assembled and in good condition refer to appropriate chapters in the instruction manual Check the fuel system for leaks paying special attention to visible parts such as the tank cap hose connections and the manual fuel pump on machines so equipped If there are any leaks or damage do not start the engine risk of fire Have your machine repaired by a servicing dealer before using it again Engage the blade lock if fitted Slide control stop switch must move easily to STOP or 0 Smooth action of throttle trigger lockout and throttle trigger the throttle trigger must return automatically to the idle position Check that the spark
23. lockwise leaner no further than stop once After returning from high altitude reset the carburetor to the standard setting If the setting is too lean there is a risk of engine damage due to insufficient lubrication and overheating 13 English Spark Plug e If the engine is down on power difficult to start or runs poorly at idle speed first check the spark plug e 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 e Move the stop switch to O E N o oO o lt a ed le N e Pull off the spark plug boot e Unscrew the spark plug 14 Checking the spark plug Installing the spark plug screw it in wrench onto the spark plug A 000BA039 KN e Clean dirty spark plug e Check electrode gap A and readjust if necessary see Specifications e Rectify the problems which have caused fouling of the spark plug Possible causes are Too much oil in fuel mix Dirty air filter Unfavorable running conditions Zz x ito a lt ao e warning If the spark plug comes with a detachable adapter nut 1 screw the adapter onto the thread and tighten it down firmly to reduce the risk of arcing and fire e Fit the spark plug by hand and e Tighten spark plug wit
24. lug e Dry the spark plug e Open the throttle wide e Crank the engine several times with the starter to clear the combustion chamber e Install the spark plug see Spark Plug e Move the stop switch to I e Set choke lever to even if the engine is cold e Now start the engine English If fuel tank has been run completely dry and then refueled 253BA023 KN e Press the manual fuel pump bulb 6 at least five times even if the bulb is filled with fuel e Now start the engine 11 English Operating Instructions During break in period A factory new machine should not be run at high revs full throttle off load for the first three tank fillings This avoids unnecessary 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 engine are greater during this period The engine develops its maximum power after about 5 to 15 tank fillings During Operation After a long period of full throttle operation allow the engine to run for a short while at idle speed so that engine heat can be dissipated by the flow of cooling air This protects engine mounted components ignition carburetor from thermal overload After Finishing Work Storing for a short period Wait for the engine to cool down Empty the fuel tank and keep the machine in a dry place well away from sources of
25. n and stands for the Registration Evaluation Authorisation and Restriction of Chemical substances 21 English 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 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 57 the symbol may appear alone on small parts 22 Disposal Observe all country specific waste disposal rules and regulations rd x n n S lt a STIHL products must not be thrown in the garbage can Take the product accessories and packaging to an approved disposal site for environment friendly recycling Contact your STIHL servicing dealer for the latest information on waste disposal EC Declaration of Conformity AND
26. ore Have your dealer or other experienced user show you how to operate your machine 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 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 HS 45 The use of noise 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 STIHL recommends that persons with pacemakers consult their physician and the pacemaker manufacturer to reduce any health risk Do not operate the power tool if you are under the influence of any substance drugs alcohol which might impair vision dexterity or judgment Use your hedge trimmer only for cutting
27. plug boot is secure a loose boot may cause arcing that could ignite combustible fumes and cause a fire Cutting blades securely mounted and in good condition clean move freely not warped properly sharpened and thoroughly sprayed with STIHL resin solvent lubricant Check cutter guard if fitted for damage Never attempt to modify the controls or safety devices in any way Keep the handles dry and clean free from oil and dirt for safe control of the power tool To reduce the risk of accidents do not operate your power tool 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 power tool on firm ground in an open area Make sure you have good balance and secure footing Hold the power tool securely The cutting blades must be clear of the ground and all other obstructions because they may begin to run when the engine starts Your power tool is designed to be operated by one person only Do not allow other persons in the work area even when starting To reduce the risk of injury avoid contact with the cutting blades Do not drop start the power tool start the engine as described in the instruction manual Note that the cutting blades continue to run for a short period after you let go of the throttle trigger flywheel effect Check idle speed setting The cutting blades mus
28. re that e no dirt falls into the tank o e Position the machine so that the filler cap is facing up e Open the filler cap Fill 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 A warnine h After fueling tighten down the filler cap as securely as possible by hand l 10 253BA020 KN Move the stop switch 1 to I Press down the lockout lever 2 and squeeze the throttle trigger 3 hold both levers in that position Press in the starting throttle lock 4 Let go of the lockout lever throttle trigger and starting throttle lock This is the starting throttle position z x A o lt ra Gr o N Set the choke lever 5 to if the engine is cold for warm start also use this posi tion if the engine has been running but is still cold Press the manual fuel pump bulb 6 at least five times even if the bulb is filled with fuel Cranking 2 N N 2 ma wo N e Place the unit on the ground Remove the blade scabbard Check that the cutting blades are not touching the ground or any other obstacles Make sure you have a safe and secure footing e Hold the unit firmly with your left hand on the front handle and press down e Pull the starter grip slowly with your right hand until you feel it eng
29. t not move when the engine is idling with the throttle trigger released Holding and Controlling the Power Tool Always hold the power tool firmly with both hands on the handles Wrap your fingers and thumbs around the handles HS 45 Right handers 442BA000 KN Right hand on the control handle and left hand on the front handle Left handers z x N o lt sa N x Y Left hand on the control handle and right hand on the front handle Make sure you have firm and secure footing and hold the power tool so that the cutting blades are always away from your body During Operation In the event of impending danger or in an emergency switch off the engine immediately by moving the slide control stop switch to 0 or STOP Check that there are no bystanders in the general work area HS 45 Watch the cutting blades at all times do not cut areas of the hedge that you cannot see Be extremely careful when cutting tall hedges check the other side of the hedge before starting work Make sure the idle speed setting is correct The cutting blades must not run when the engine is idling with the throttle trigger released If the cutting blades still run have your dealer check your machine and make proper adjustments or repairs Check and correct the idle speed setting regularly Note that the cutting blades continue to run for a short period after you let go of the throttle trigger flyw
30. troke engine oil for the fuel mix in models with a catalytic converter Mix Ratio STIHL 50 1 two stroke engine oil 50 parts gasoline to 1 part oil HS 45 Examples Gasoline STIHL engine oil 50 1 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 e Use a canister approved for storing fuel Pour oil into canister first then add gasoline and mix thoroughly Storing Fuel Store fuel only in approved safety type fuel canisters in a dry cool and safe location protected from light and the sun Fuel mix ages only mix sufficient fuel for a few weeks work Do nat store fuel mix for longer than 30 days Exposure to light the sun low or high temperatures can quickly make the fuel mix unusable STIHL MotoMix may be stored for up to 2 years without any problems e Thoroughly shake the mixture in the canister before fueling your machine Awaenine Pressure may build up in the canister open it carefully e Clean the fuel tank and canister from time to time English Dispose of remaining fuel and cleaning fluid properly in accordance with local regulations and environmental requirements English Fueling Starting Stopping the Engine e Observe safety precautions see mie chapter on Safety Precautions and Working Techniques Preparations 5 e Oo e Before fueling clean the filler cap and the area around itto ensu
31. x x Complete machine Clean x Control handle Check operation x x Clean x x Air filter Replace x Check x Manual fuel pump if fitted Have repaired by servicing dealer x Have checked by servicing dealer x Pickup body in fuel tank Have replaced by servicing dealer x x Fuel tank Clean x x Check idle adjustment x x Carburetor Readjust idle x Readjust electrode gap x Spark plug Replace after every 100 operating hours Visual inspection x Cooling inlets Clean x Have checked by servicing dealer x 2 Spark arresting screen in muffler Have cleaned or replaced by servicing x dealer All accessible screws and nuts not adjust Retighten X ing screws Visual inspection x Antivibration elements Have replaced by servicing dealer x x HS 45 17 English The following intervals apply to normal operating conditions only If your daily work ing time is longer or operating conditions are difficult very dusty work area etc gt A 2 shorten the specified intervals accordingly z 3 5 dD 9 3 5 2 5 5 E ke DO S 5 5 8 8 D 9 gt o 5 D amp pe gt T 3 2 2 2 zZ gt 2 E 3 8 5 5 5 5 5 S Q 2 gt Si Dv a a 3 E Clean x Sharpen x Cutting blades Visual inspection x Have replaced by servicing dealer x Gearbox lubrication Check and replenish after every 50 hours of operation Safety l
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