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Operator's manual ( EPA ) _ _ _ _ 371K 375K Please read these instructions carefully and make sure you understand them before using the machine . English
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SYMBOL EXPLANATION Symbols on the power cutter : WARNING ! The power cutter can be dangerous ! Careless and incorrect use can result in serious or fatal injury to the operator or others . Please read the instructions carefully and make sure you understand them before using the power cutter . Always wear : • Approved protective helmet • Approved hearing protection Q • Protective glasses or visor Warning Cutting creates a lots of dust which can cause inhalation damages . Use appropriate dust mask or respirator protection . Avoid breathing petrol fumes A and exhaust gases . Provide for good ventilation . Warning Sparks from the cutting blade can cause fire in combustible materials such as : petrol Ak ( gas ) , wood , dry grass etc . Symbols in the Operator's Manual : Switch off the engine by moving the stop switch to the STOP position before carrying out any checks or maintenance . Always wear approved protective gloves . Regular cleaning is required . _ l Protective glasses or a visor must be worn . 2 - English
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CONTENTS List of Contents Before using your new Power cutter • Read the Operator's Manual carefully . Symbol explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . • Check the assembly and adjustment of the cutting blade , see Safety instructions chapter " Assembly ' . Personal protective equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 • Start the engine and check the carburettor settings . See chapter " Maintenance " , section " Carburetor ' . When adjusted The power cutter's safety equipment . . . . . . . . . . . . . . . . . . . . . . 4 correctly the cutting blade should not rotate when idling . Control , maintenance and service of the machine's safety Setting the idling speed is described in the Operator's equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Manual . Adjust the speed according to these instructions . Do General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 not use the power cutter if the idling speed is not correctly Transport and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 adjusted ! • Let your Husqvarna dealer check the power cutter and carry Fuel safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 out essential adjustments and repairs . General working instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Cutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Maintenance , replacement , or repair of the emission Kickback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 control devices and systems may be performed by any Care and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 nonroad engine repair establishment or individual . Cutting blades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . lO Abrasive discs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Cutting blades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Diamond blades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 What is what ? What is what on a power cutter ? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Assembly Fitting the cutting head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Checking the drive shaft and flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Fitting the cutting blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Fuel handling Fuel mixture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Fuelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Start and stop Start and stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Maintenance Adjusting the drive belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Changing the drive belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Carburettor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Fuel filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Air filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 WARNING Spark plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 The engine exhaust from this productte Cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 contains chemicals known to theSta Daily maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 of California to cause cancer , birth Weekly maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 defects or other reproductive harm . Monthly maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Technical Data 371K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 375K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Emission Control Warranty Statement Your warranty rights and obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 You will find the following label on your power cutter : Husqvarna AB has a policy of continuous product development and therefore reserves the right to modify the design and appearance of products without prior notice . A WARNING A Cutters can be dangerous ! For safe operation follow all safety precautions in operator's manual . IMPORTANT ENGINE INFORMATION BHusqw _ a 371K 71 cc 3HVXSJ71ERC 375K 75 cc 3HV ) ( S _ 765RB HUSQVARNAABHUSKVARNASWEDEN THISENGINECONFORM3S " 01097U _ . EPAEMISSION REGULATIOFNORSMALLNONROADENGINES . REFERTO OPERATOR'MSANUALFORMAINTENANCE SPECIFICATIONASNDADJUSTMENTS . English - 3
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SAFETY INSTRUCTIONS THE POWER CUTTER'S SAFETY EQUIPMENT This section describes the power cutter's safety equipment , its function and how checks and maintenance are carried out to ensure that it operates correctly . ( See the chapter " What is what " to locate where this equipment is positioned on your power cutter . ) PERSONAL PROTECTIVE EQUIPMENT 1 Anti - vibration system • PROTECTIVE HELMET • EAR PROTECTION • PROTECTIVE GLASSES Your power cutter is equipped OR FULL FACE with an anti - vibration system . PROTECTION This is designed to give as low vibration levels and comfortable usage as possible . • BREATHING MASK • HEAVY - DUTY , FIRM GRIP GLOVES The power cutter's anti - vibration system reduces the transfer of vibration between the engine / cutting equipment and the cutting trolley . The engine body including the • SNUG - FITTING , HEAVY - cutting equipment is DUTY , COMFORTABLE suspended in a handle system CLOTHING THAT ALLOWS via anti - vibration elements . FULL FREEDOM OF MOVEMENT • LEG PROTECTION ( TO PROTECT AGAINST SPARKSAND CUTTING FRAGMENTS ) • ANTI - SLIP BOOTS WITH STEEL TOE CAPS 2 Stop switch The stop switch should be used to stop the engine . • FIRST AID KIT SHOULD ALWAYS BE ON HAND 4 = English
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SAFETY INSTRUCTIONS 3 Muffler Control , maintenance and service of the machine's safety equipment The muffler is designed to give the lowest possible noise level and to direct the engine's exhaust fumes away from the user . The engine's exhaustntain fumes are hot and can co sparks , which can lead to the outbreak of fire . 1 Anti - vibration system Check the anti - vibration MPORTANT INFORMATION ! It is extremely important that elements regularly for material the instructions for checking , maintaining and servicing cracks and deformation . the muffler are followed . ( see the section " Control , maintenance and service of the machine's safety equipment'S . 4 Throttle lock The throttle lock is designed to prevent accidental opera - tion of the throttle control . When you press the lock ( A ) Check that the anti - vibration ( i . e . when you grasp the A elements are securely handle ) it releases the throttle mounted between the engine trigger ( B ) . When you release unit and the handle system . the handle the throttle trigger and the throttle lock both move back to their original positions . This movement is controlled by two independent return springs . This arrange - B ment means that the throttle control is automatically locked at the idle setting when you release the handle . 2 Stop switch 5 Blade guard for the cutting blade Start the engine and make sure that the engine stops when the stop switch is moved to the stop position . The blade guard is mounted above the cutting blade and prevents cutting fragments from being thrown towards the user . English = 5
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SAFETY INSTRUCTIONS 3 Muffler 5 Blade guard for the cutting blade Never use a defective blade Never use a machine that guard or a blade guard that is has a defective muffler . not fitted correctly . Check regularly that thehe muffler is secured to t engine body . 4 Throttle lock _ _ er _ i _ _ 6 _ ks _ . . . . . . . . . . . . . . . . . . . . . 1 Make sure the throttle control is locked at the idle setting when youlock . release the throttle GENERAL SAFETY INSTRUCTIONS IMPORTANT INFORMATION ! Do not use the power cutter until you have read the entire contents of this Operator's Manual . All servicing , in addition to the points listed in the section " Control , maintenance and service of the Press the throttle lock and power cutter's safety equipment ' , should be carried make sure it returns to its out by trained service specialists . original position when you release it . • Use the equipment recommended in the chapter " Personal safety equipment " , • Never use the machine when you are tired , under the influence of medicines / drugs or alcohol . 3 Check that the throttle • Do not lend the power cutter to anyone without providing this control and throttle lock Operator's Manual . Ensure the person using the power cutter move freely and that the understands the information in this Operator's Manual . return springs work properly . Transport and storage • Store the power cutter under lock and key so that it's out of reach for children and unauthorised persons . 4 Start the power cutter and • Do not store or transport the power cutter with the cutting blade fitted . apply full throttle . Release the throttle control and check that the blade stops and remains stationary . If the blade rotates when the throttle is on idle setting you should check the carburettor idle adjustment . See the section on " Maintenance " . 6 = English
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SAFETY INSTRUCTIONS GENERAL WORKING INSTRUCTIONS Fuel safety This section takes up the basic safety precautions for working ( Filling / Fuel mixture / Storage ) with the power cutter . Follow these general working instructions , but never use a machine without the possibility of calling for help in the event of an accident . Basic safety precautions • Never fill the machine while IMPORTANT INFORMATION ! Never work with a power the engine is running . cutter that is defective or incorrectly adjusted . Do not work with a power cutter that is incomplete or where • Provide good ventilation assembly has not been carried out in a satisfactory when filling or mixing fuel manner . Check that the cutting blade stops rotating ( petrol and 2 - stroke oil ) . when the throttle is released . If you encounter a situation where you are uncertain how to proceed you should ask • Move the machine at least 3 an expert . m from the filling position Avoid all usage which you consider to be beyond your before starting . capability . Min3m j ( lOft ) • Never start the machine : • Check that no one is in the immediate vicinity when the a ) If you have spilt fuel machine is started or while working with the machine to on it . Wipe up all spillage . ensure that people , animals or other things cannot affect your control of the power cutter . b ) If you have spilt fuel • Avoid usage in unfavourable weather conditions , for example , on yourself or your thick fog , heavy rain , strong winds or extreme cold , etc . To clothes . Change your work in bad weather conditions is tiring and can create clothes . dangerous circumstances , e . g . slippery surfaces . c ) If there is a fuel leak . • Never start to work with the power cutter before the working Make regular checks for area is clear and you have a firm foothold . Look out for any leakage from the fuel obstacles with unexpected movement . Ensure when cutting cap and the fuel supply that no material can become loose and fall , causing operating pipes . injury . Take great care when working on sloping ground . • Store the power cutter and fuel so that any leakage or fumes • Make sure clothing and parts of the body do not come into do not risk coming into contact with sparks or naked flames . contact with the cutting blade when the engine is started . For example , electric machines , electric motors , electrical • Maintain a safe distance from the cutting blade when the switches / power switches , heaters or the like . engine is running . • When storing fuel , approved containers intended for this • The blade guard should always be fitted when the engine is purpose must be used . running . • Ensure that the working area is sufficiently illuminated to • When storing the power cutter for long periods the fuel tank create a safe working environment . must be emptied . Contact your local petrol station to find out how to dispose of excess fuel . • Check the cutting area for buried cables and wires . • Use a Husqvarna fuel can with an anti - spill device . Cutting i _ • Start cutting with the engine at full throttle . • Always hold the power cutter firmly , with both hands . Hold the machine so that the thumb and fingers grip around the handle . English = 7
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SAFETY INSTRUCTIONS Water cooling increases blades ' ) ; i Sharpening diamond blades Blades can become dull when the wrong feeding pressure is used or when cutting some materials such as heavily reinforced Cutting technique concrete . To force a dull blade results in overheating and finally The technique described below is of a general character . Check the loss of segments ( part of the blade ) . information for each blade regarding individual cutting characte - ristics . ( For example , a diamond blade requires less feeding Sharpen against a soft material such as sandstone or haydite pressure than a abrasive blade brick . 1 . Support the work piece in Blade vibration such away that you can \ predict what will happen The blade can become out of shape ( not round ) and vibrate if a and so it will not pinch . too high feeding pressure is used or if the blade is pressed into the work piece . 2 . Always cut at full throttle . A lower feeding pressure ought to stop the vibration . Otherwise 3 . Start cutting gently , do replace the cutting blade . not force or squeeze the blade in . Kickback 4 . Use a high blade speed . 5 . Move the blade slowly backwards and forwards . 6 . Use a small part of the blade's cutting edge . If the sector of the blade illustrated below is used for cutting the blade can start to climbing and kickback the power cutter 7 . Only use the blade's upwards and backwards towards the user with immense force . cutting edge when cutting . How to avoid kickback 8 . Cut with the blade fully 1 . Never cut with the vertical - at right angles i i to the work piece . segment illustrated in the diagram . 2 . Keep a good balance and a firm foothold . 3 . Use both hands and take a firm grip with the thumb and fingers around the handle . 4 . Keep the work piece at a comfortable distance . 5 . Use the cutter at full throttle . 6 . Take care when inserting the blade in an existing cut . 7 . Never cut above shoulder height . 8 . Be alert to movement of the work piece or anything else that can occur , which could cause the cut to close and pinch the blade . 8 = English
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SAFETY INSTRUCTIONS Pull in Care and storage Pull in occurs when the lower part of the blade is suddenly stopped or when the cut closes . ( To avoid this see the section General " How to avoid kickbacl # ' and " Pinching / rotation " below ) . Husqvarna's power cutters are robust and durable . However , as Pinching / rotation they are used for high speed operations all servicing should be carried out on time and as specified , so that the power cutter Pinching occurs when the cut closes . The power cutter can be always works effectively and safely . drawn suddenly and powerfully downwards . Read this Operator's Manual to determine which service How to avoid pinching routines you can carry out and ensure that all other service Support the work piece in work is carried out by an authorised service workshop . such a way that the cut remains open during the Power Cutter cutting operation and when Always handle the power cutter with care and store it with the the cut is finished . blade removed . Drying the blade Blades After using an abrasive blade • All blades should be with water cooling , let the removed from the cutter cutter run at full throttle for after use and stored approx , haft a minute so that carefully . the blade dries . • Special care should be If a damp blade is stored it taken with abrasive can become unbalance and blades . cause damage . • Blades must be stored on Check the speed of the a firm , level surface . If drive shaft blades are supplied with a Use a tachometer regularly to backing pad then a spacer check the speed of the drive should be used to keep shaft when the cutter is them flat . running at working tempera - ture and at full throttle without • Avoid moisture and a load . The maximum speed temperature extremes . is stated on the unit . • Remove the blades before the cutter is moved or transported . • Inspect new blades for transport or storage damage . English = 9
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SAFETY INSTRUCTIONS Abrasive discs CUTTING BLADES The cutting material on abrasive discs consists of grit bonded using an organic binder . " Reinforced blades " are made up of a fabric or fibre base that prevents total breakage at maximum working speed if the blade should be cracked or damaged . ( The term reinforced does not refer to those cutting blades that are only reinforced around the flange ) . A cutting blade's performance is determined by the type and size of abrasive corn , and the type and hardness of the bonding agent . Characteristics that give the blade a shorter service life and greater cutting capacity are said to make the blade " softer " . A blade with a longer service life and slower cutting capacity is a blade with a " harder " effect . High quality cutting blades are normally more economical . Lower quality cutting blades usually have an inferior cutting capacity and shorter service life , which results in higher cost per processed material . General Cutting blades are available in two basic designs ; abrasive ABRASIVE DISCS , TYPES AND USES discs and diamond blades . Only abrasive discs and diamond blades may be used and only within their respective application Use areas . Blade General Material Water cooling type characteristics Can be used to Con - Universal Concrete , reduce dust . crete usage , asphalt , High speed portable tools economical . The disc should stone , Our cutting blades are manufactured for high - speed , portable not be stored brickwork , power cutters . If blades from other manufacturers are use & cast iron , after cutting is ensure that the blades conform to all regulations and demands aluminium , complete as that concern this type of power cutter . water affects the copper , brass , cables , strength of the disc while rubber , etc . stored . Special blades Metal Unbeatable for NOT Steel , steel Some cutting blades are designed for stationary equipment and recommended . steel ( not alloys and for use with attachments . Such cutting blades must not be used suitable for other hard on portable power cutters . metals . concrete , etc . ) Always contact local authorities and make sure you are following applicable directives . 10 - English
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SAFETY INSTRUCTIONS Guard Type of cutting blades The cutting blade should be Check that the guard is not marked with the same or a cracked or shows signs of any higher speed than that stated other damage . Clean the on the machine's rating plate . inside of the guard before Never use a cutting blade fitting a new blade . Check that with a lower speed rating than the guard can be adjusted . what is stated on the machine's rating plate . Damage Diamond blades • Ensure the blade it not cracked or damaged in any Diamond blades consist of a steel body with segments that other way . contain industrial diamonds • Test the abrasive disc by hitting it lightly with a pieces DIAMOND BLADES , TYPES AND USES of wood . If the blade doe not give a full - sounding ring Diamond General char - Material Water cooling then it is damaged . blade acteristics • Never use a blade that has All brickwork , Increases the Low cost per fallen on the floor . reinforced blade's service cutting opera - tion . Fewer concrete and life other blade changes . Assembly Constant composite • Check that the blade is materials . cutting depth . fitted correctly and is NOT Less dust . secure . recommended for metal . • Follow all specifications in the table below . Specifications for fitting blades Standard blades inches . 787 7 / 8 1 centre hole mm 20 22,2 25,4 Using diamond blades ( spindle ) Proceed as follows : Reducing bush * Max . thickness Blade thickness • Let the cutting blade rotate in the same direction as the Min thickness 3 mm ( 1 / 8 " ) arrow markings indicate . • Cool continually with water . Backing pad Material Highly compressible , ( Must be used ) e . g . blotting paper • Keep the cutting blade sharp . Max . thickness 0,5 mm ( . 020 " ) • Remove the cutting blade when the machine is transported . Spindle hole / Play 0,2 mm ( . 010 " ) Avoid : drive shaft • Running the cutting blade in the wrong direction . Flange tightening The bolt is tightened to 15 - 25 Nm • Forcing a dull blade or wedging the blade into a cut . Blade / guard Check that the blade runs free of the • Transporting the power cutter with the blade fitted . guard . • Letting the blade fall on the work piece . Diamond blades for dry cutting * Plastic reducing bushes may only be used with abrasive discs . Do not use reducing bushes with diamond blades or Diamond blades for dry cutting are a new generation of blades tungsten carbide blades . We recommend that the spindle is that do not require water cooling . However , the blades are still replaced so that it fits the blades to be used rather than using damaged by excessive heat . It is good economics to let the a reducing bush . Contact your service workshop for details . blade cool by simply lifting the blade from the cut every 30 - 60 seconds and let it rotate in the air , for 10 seconds to cool . Eng $ ish - 11
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WHAT IS WHAT ? @ ® What is what on a power cutter ? 1 . Cylinder cover 13 . Combination spanner 2 . Muffler 14 . Air filter cover 3 . Fuel tank 15 . Blade guard 4 . Rear handle 16 . Starter handle 5 . Choke / Throttle trigger lockout 17 . Operator's manual 6 . Throttle catch 18 . Adjustment lever for blade guard 19 . Front handle 7 . Stop switch 20 . Starter 8 . Cutting head 9 . Cutting arm 21 . Decompression valve 10 . Belt tensioning screw 22 . Warning decal 11 . Cutting blade 23 . Type plate 12 . Throttle 12 - English
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ASSEMBLY Fitting the cutting head Fitting the cutting blade Husqvarna cutting blades are Remove the bolt ( 1 ) and nut manufactured and approved ( 2 ) . Remove the cover . Fit the for freehand cutting . The drive belt over the clutch paper labels on each side of drum . Refit the cover and the blade are there to tighten the bolt ( 1 ) and nut ( 2 ) . distribute the pressure from the flange washer and prevent the blade from slipping . The blade is placed between 2 the flange hub ( A ) and the flange washer ( B ) . The flange A B washer is turned so that it fits in the flange hub . The cutting blade is tightened using the socket spanner 501 69 17 - 02 . The shaft can be locked using a screwdriver , steel pin or the Feed the drive belt over the like . This is slid in as far as pulley on the cutting head . possible . The blade is tighte - ned clockwise . Tightening torque for the bolt holding the blade is : 15 - 25 Nm ( 130 - 215 inJb ) . Secure the cutting head together with the belt guard . Tighten both bolts slightly , then loosen 1 / 2 turn . Screw in the tensioning screw ( 3 ) so that the square nut is in Blade guard line with the arrow on the belt guard . Shake the head to The blade guard should ensure the spring can tension always be fitted on the the belt . This automatically 3 power cutter . adjusts the belt to the correct The guard should be adjusted tension . Tighten both bolts ( 4 ) so that the rear section is using the combination close to the work piece . spanner . Cutting fragments and sparks NOTE ! are then collected by the After fitting a new belt the belt guard and led away from the tension must be readjusted user . By using the lever ( A ) after the first two tanks of fuel the guard can be loosened have been used . and set in the required position . Checking the drive shaft and flanges • Check that the threads on the drive shaft are undamaged . • Check that the contact surfaces of the cutting blade and flanges are flat , run correctly on the spindle and are free from foreign objects . Do not use flanges that are twisted , have damaged edges , untrue or dirty . Do not use different size flanges . Eng $ ish - 13
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FUEL HANDLING Fuelmix Fuelling IMPORTANT ! The power cutter is equipped with a two - stroke engine and must always been run using a mixture of gasoline and two - stroke engine oil . It is important to accurately measurere the amount of oil to be mixed to ensure that the correct mixtu is obtained . When mixing small amounts of fuel , even small inaccuracies can drastically affect the ratio of the mixture . Gasoline • This engine is certified to operate on unleaded • Keep the handle dry , clean gasoline . and free from oil and fuel . • Use good quality unleaded gasoline . • The lowest recommended octane rating is 87 . If you run the engine on lower • Clean around the fuel cap . Clean the fuel tank octane rating than 87 so - called " knocking " can occur . regularly . The fuel filter This leads to an increased should be changed at least I engine temperature , which once per year can result in a serious Contamination in the tank engine breakdown . can disrupt operations . Ensure that the fuel is well • When working at continuous mixed by shaking the high revs a higher octane container before filling the rating is recommended . Gasoline Oil tank . 2 % ( 1 : 50 ) Lit , Lit . Two - stroke oil 5 0,10 • For the best results use 10 0,20 HUSQVARNA two - stroke oil , 15 0,30 20 0,40 which is especially • Always exercise care when US US developed for power cutters . filling the fuel . Move the gallon fLoz . Mixing ratio 1 : 50 ( 2 % ) . power cutter at least three 1 21 / 2 metres from the filling area • Never use two - stroke oil 21 / 2 61 / 2 before starting . Make sure intended for water cooled 5 127 / 8 the fuel cap is tightened . outboard engines , so - calle & outboard oil . • Never use oil intended for four - stroke engines . Mixing • Always mix the gasolineainer and oil in a clean cont intended for fuel . • Always start by filling half 6 the amount of the gasoline to be used . Then add the entire amount of oil . Mix ( shake ) the fuel mixture . Add the remaining amount of gasoline . • Mix ( shake ) the fuel mixture thoroughly before filling the saw's fuel tank . • Do not mix more than max . one month's supply of fuel . • If the saw is not used for some time the fuel tank should be emptied and cleaned . • This engine is certified to operate on unleaded gasoline . 14 - English
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START AND STOP Start Start and stop Take hold of the front handle using your left hand . Place your right foot on the lower section of the rear handle and press the power cutter against the ground . Never twist the starter cord around your hand . Grip the starter with your right Starting a cold engine hand , and slowly pull the starter cord out until you feel IGNITION : some resistance ( the pawls Slide the stop switch to the grip ) now pull quickly and left . powerfully . NOTE [ Do not pull out the starter cord completely and do CHOKE : not release the starter from Pull out the choke . the fully extended position . This can damage the power cutter . DECOMPRESSION VALVE Press in the value to reduce When the engine starts , the pressure in the cylinder , quickly apply full throttle iandll this makes starting the power the starter throttle catch w cutter easier . The automatically disengage . decompression valve should always be used when starting . When the machine has started the value automatically returns to its original position . FAST IDLE : Stop Combined choke / fast idle is received when the choke is moved to choke position . The engine is stopped by switching off the ignition . ( Slide the stop switch to the right . ) Starting a warm engine Use the same procedure as for starting cold engine sbut / I I without choke . Fast idle i recived by first set the choke control in choke position , and then back again . English - 15
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MAINTENANCE Adjusting the drive belt Belt pulley and clutch Never start the engine when the belt pulley and dutch are • The drive belt is fully removed for maintenance . enclosed and well protected from dust , dirt and A mechanical effects during the cutting process . • To tension the drive belt , slightly loosen the bolts ( A ) , which secure the cutting head and belt guard . • Turn the tensioning screw B so that the nut ( B ) is located directly under the arrow on the cover . Shake the head to ensure the spring can tension the belt . The belt now automatically has the right tension . • Tighten the bolts that hold the cutting head . B I IMPORTANT INFORMATION ! A new drive belt should be tensioned after using one tank of fuel . Changing the drive belt • Loosen the two bolts ( A ) . • Turn the tensioning screws ( B ) until the tension has A been released . • Remove the two bolts ( A ) . • Remove the front belt cover ( c ) . • Remove the belt from the C pulley . B • Dismantle the cutting head . • Remove bolt ( E ) and nut ( D ) . Remove the side cover . • Replace the drive belt . • To assemble reverse the procedure for dismantling . • Check the cutting blade's blade guard for signs of cracking or other damage . Replace it if damaged . D 16 - English
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MAINTENANCE Conditions Carburetor • Before any adjustments are made the air filters should be Your Husqvarna product has been designed and manufactured clean and the cylinder cowling fitted . Adjusting the carburetor to specifications that reduce harmful emissions . while a dirty air filter is in use will result in a leaner mixture After your unit has been run 8 - 10 tanks of fuel the engine has when the filter is finally cleaned . This can give rise to serious broken in . To ensure that your unit is at peak performance and engine damage . producing the least amount of harmful emissions after break in , • Carefully turn the L and H needle to the mid point . have your authorized servicing dealer , who has a revolution • Do not attempt to adjust the needles beyond the stops as counter at his disposal , to adjust your carburetor for optimum damage can occur . operating conditions . • Now start the engine according to the starting instructions and run it warm for 10 minutes . NOTE ! If the blade rotates the T screw should be turned Functioning , Basic setting , Final setting counter - clockwise until the disk stops . • Place the engine on a flat surface so that the disk points away from you and so that the disk do not come into contact with the surface or other objects . Low speed needle L Turn the low speed needle L clockwise until the stop . If the Operation engine has bad acceleration or erratic idling , turn the L needle • The carburetor governs the engine speed via the throttle . Air / counter - clockwise until good idling and acceleration . fuel are mixed in the carburetor . NOTE ! If the disk rotates in the idling position , turn the idling speed screw counter - clockwise until the disk stops . Govenor The engine is equipped with in the ignition built in non Final setting of the idling speed T adjustable electronic speed limiter . The limiter prevents the Adjust the idling speed with the screw T . If it is necessary to re - engine from being ran at a too high RPM . adjust , first turn the idle speed adjusting screw T clockwise , until the disk starts to rotate . Then turn , counter - clockwise until the disk stops . A correctly adjusted idle speed setting occurs when the engine runs smoothly in every position . It should also be good margin to the rpm when the disk starts to rotate . • The carburetor has three adjustment possibilities : L = Low speed jet . H = High speed jet . T = Adjustment screw for idling . Correctly adjusted carburetor A correctly adjusted carburetor means that the engine accelerates without hesitation . Furthermore , the disk must not rotate at idling . A too lean adjusted low speed needle L may cause starting difficulties and bad acceleration . A too lean • The T screw regulates the idling speed . If the screw T is adjusted high speed needle H gives lower power = less capacity , turned clockwise this gives a higher idling speed ; counter - bad acceleration and / or damage to the engine . A too rich clockwise a lower idling speed . adjustment of the two speed needles L and H gives accelera - tion problems or too low working speed . Basic setting and running in The carburetor is set to its basic setting when test run at the factory . Fine adjustment should be carried out by a skilled technician . NOTE ! If the disk rotates while idling the T screw should be adjusted counter - clockwise until it stops . Recommended idling speed : 2 500 rpm . English - 17
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MAINTENANCE Fuel filter • The fuel filter sits inside the fuel tank . • The fuel tank must be protected from contamination when filling . This reduces the risk of operating disturbances caused by blockage of the fuel filter . • The filter cannot be cleaned but must be replaced with a new filter when it blocked . The filter should be changed at least once per year . Air filter The air filter should be cleaned regularly removing dust and dirt to avoid : • Carburettor malfunction • Starting problems • Reduced engine power • Unnecessary wear to engine parts A The air filter system consists of a backup filter ( 1 ) and a main filter ( 2 ) : 1 ) The main filter is an oiled B foam rubber filter that is easily accessible under the filter cover ( A ) . In dusty conditions this filter should be inspected / replaced each week . In order to obtain a good filtering effect , the filter must be cleaned and oiled regularly . Specialil HUSQVARNA o has been produced for this purpose . • Remove the filter . Wash the filter carefully in tepid , soapy water . After cleaning rinse the filter thoroughly in clean water . Squeeze out the filter and let the filter dry . NOTE ! Compressed air at a high pressure can damage the foam . • Oil the filter carefully . It is extremely important that the entire filter is saturated in oil . 2 ) The backup filter is a paper filter accessible from under cover B . This filter should be replaced / cleaned when the engine's power drops or each month . The filter is cleaned by shaking or by careful blowing with compressed air . Note that the filter must not be washed ! A filter used for a long period of time can never be completely cleaned . Therefore all air filters must be replaced periodically with a new filter . A damaged air filter must always be replaced . Insufficient care of the air filter will cause deposits on the spark plug resulting in abnormal wear to engine I IMPORTANT INFORMATION ! I parts . 18 - English
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MAINTENANCE Starter Tensioning the recoil spring • Lift up the starter cord from _ i _ _ itsii the cut out on the pulley and turn the pulley approx . 2 turns clockwise . NOTE ! Ensure the starter pulley can be turned at least a further 1 / 2 turn when the starter cord is fully extended . Replacing a broken or worn starter cord Changing the broken recoil spring • Loosen the bolts that hold the starter against the crankcase and lift off the starter unit . • Lift the starter pulley ( see " Changing a broken or worn starter cord % • Dissasemble the recoil spring by tapping the pully ( with its inside facing down ) lightly against a working • Pull out the cord approx . 30 bench or similar . If the cm and lift it out of the cut - spring pops out when out in the starter - pulley's assembling , it should be periphery . Reset the recoil mounted again , out and in spring by allowing the pulley towards the centre . to slowly rotate backwards . • Lubricate the recoil spring with thin oil . Assemble the starter pulley , and tension the recoil spring . • Undo the bolt in the centre of the pulley and remove Fitting the starter the pulley . Insert and secure a new starter cord in the starter pulley . Wind approx . • Fit the starter by first pulling 3 turns of the starter cord on out the starter cord and then the starter pulley . Fit the placing the starter in starter pulley against the position on the crankcase . starter so that the end of the No slowly release the return spring hooks into the starter cord so that the starter housing . Fit the bolt pawls grip in the pulley . into the centre of the starter pulley . Carry the starter cord through the hole in the • Fit and tighten the screws starter housing and the that hold the starter . starter handle . Tie a good knot on the starter cord . Eng $ ish - 19
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MAINTENANCE Spark plug Cooling system To maintain as low an operating temperature as possible the power cutter is equipped with a cooling system . The condition of the spark plug is affected by : The cooling system consists of : • An incorrect carburettor 0,5 mm setting . 1 . An air intake on the • An incorrect fuel mixture starter unit . ( too much oil ) . • A dirty air filter . 2 . Air flow guide . 5 \ These factors cause deposits 3 . Cooling fins on the on the spark plug electrode flywheel . that may result in malfunction or starting difficulties . 4 . Cooling fins on the cylinder • If the machine is low on 5 . Cylinder cover ( leads cold power , difficult to start or air onto the cylinder ) . runs poorly while idling always check the spark plug first . If the spark plug is dirty , clean it and at the Clean the cooling system _ 2 same time check that the using a brush at least once electrode gap is 0,5 mm \ \ \ 1 a week , in difficult ( . 020 " ) . The spark plug conditions more often . A should be changed after dirty or blocked cooling about one month of system leads to the engine operation or earlier if overheating resulting in necessary . damage to the cylinder and piston . NOTE ! Always use the recommended type of spark plug . ( see chapter " Technical data ' ) ! An incorrect spark plug can damage the cylinder / piston . Muffler The muffler is designed ine order to reduce the nois level and to direct the exhaust gases away from the operator . The exhaust gases are hot and can contain sparks , which may cause fire if directed against dry and combustible material . Never use a saw with a clogged or defective muffler . 20 - English
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MAINTENANCE ® \ ® \ \ \ \ \ \ \ \ \ \ \ ® Below follows some general maintenance instructions . If you need further information please contact your service workshop . Daily maintenance 1 . Check that throttle components work correctly from a safety view point ( throttle and starter throttle catch ) . 2 . Check the tension of the drive belt . 3 . Check the condition of the cutting blade . 4 . Check the condition of the blade guard . 5 . Check the starter and the starter cord ; clean the outside of the starter's air intake . 6 . Check that all nuts and bolts are tightened correctly . 7 . Check that the short - circuiting contact functions . Weekly maintenance 8 . Clean the main filter . 9 . Check that the handles and anti - vibration elements are not Monthly maintenance damaged . 15 . Clean the backup filter . 10 . Clean the spark plug . Check that the electrode gap is 0.5 mm . 16 . Check the clutch drum , drive - pulley , and clutch springs with regard to wear . 11 . Clean the cooling fins on the flywheel . Check the starter 17 . Clean the outside of the carburettor and recoil spring . 12 . Clean the cooling fins on the cylinder . 18 . Check the fuel filter , fuel hose , change if necessary . 13 . Check the muffler . 19 . Clean the inside of the fuel tank . 14 . Check the carburettor . 20 . Check all cables and connections . Eng $ ish - 21
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TECHNICAL DATA 371 K 375K Engine Cylinder volume , cu . in / cm 3 4,3 / 70,7 4,6 / 74,7 Cylinder bore , inch / mm 1,97 / 50 2,02 / 51,4 Stroke , inch / mm 1,4 / 36 1,4 / 36 Idle speed , rpm 2 500 2 500 Max . speed , unloade & rpm 9 800 - + 250 9 800 - + 250 Power , kW 3,5 / 9 300 3,7 / 9 800 Ignition system Manufacturer FHP SEM CD CD Type of ignition system Spark plug Champion RCJ - 7Y Champion RCJ - 7Y NGK BPMR 7A NGK BPMR 7A Electrode gap , inch / mm 0,02 / 0 _ 5 0,02 / 0 _ 5 Fuel and lubrication system Manufacturer Walbro Walbro HD 20 HD 20 Carburettor type Fuel capacity , US pint / litre 1,63 / 0,77 1,63 / 0,77 Weight Without fuel and cutting blade , Lbs / kg 12 " ( Q 300 mm ) 20,7 / 9,4 14 " ( 0 300 mm ) 21,4 / 9,7 Cutting equipment Cutting blade Gear ratio Max . peripherical speed 12 " 1 : 1.97 80 m / s 14 " 1 : 1.97 100 m / s IIIIIIIIIIIIIIIIIIIIIIIIIIIII
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FEDERAL EMISSION CONTROL WARRANTY STATEMENT YOUR WARRANTY RIGHTS AND WHAT IS COVERED REPAIR OR REPLACEMENT OF PARTS OBLIGATIONS Repair or replacement of any warranted part will be performed The EPA ( The US Environmental Protection Agency ) , at no charge to the owner at an approved Husqvarna Forest & Environment Canada and Husqvarna Forest & Garden are Garden servicing dealer . If you have any questions regarding pleased to explain the emissions control system warranty on your warranty rights and responsibilities , you should contact your 2002 and later small off - road / nonroad engine . In U . S . your nearest authorized servicing dealer or call Husqvarna and Canada , new small off - road / nonroad engines must be Forest & Garden at 1 - 888 - 487 - 5963 . designed , built and equipped to meet the federal stringent WARRANTY PERIOD anti - smog standards . Husqvarna Forest & Garden must Any warranted part which is not scheduled for replacement as warrant the emission control system on your small off - road / required maintenance , or which is scheduled only for regular nonroad engine for the periods of time listed below provided inspection to the effect of " repair or replace as necessary " there has been no abuse , neglect or improper maintenance shall be warranted for 2 years . Any warranted part which is of your unit . Your emission control system includes Parts scheduled for replacement as required maintenance shall be such as the carburetor and the ignition system . warranted for the period of time up to the first scheduled Where a warrantable condition exists , Husqvarna Forest & replacement point for that part . Garden will repair your small off - road / nonroad engine at no DIAGNOSIS cost to you . Expenses covered under warranty include The owner shall not be charged for diagnostic labor which diagnosis , parts and labor . leads to the determination that a warranted part is defective , if the diagnostic work is performed at an approved Husqvarna MANUFACTURER'S WARRANTY Forest & Garden servicing dealer . CONSEQUENTIAL DAMAGES COVERAGE Husqvarna Forest & Garden may be liable for damages to The 2002 and later small off - road / nonroad engines are other engine components caused by the failure of a warranted warranted for two years . If any emission related part on your part still under warranty . engine ( as listed above ) is defective , the part will be repaired or replaced by Husqvarna Forest & Garden . WHAT IS NOT COVERED All failures caused by abuse , neglect or improper maintenance OWNER'S WARRANTY are not covered . RESPONSIBILITIES ADD - ON OR MODIFIED PARTS As the small off - road / nonroad engine owner , you are The use of add - on or modified parts can be grounds for responsible for the performance of the required maintenance disallowing a warranty claim . Husqvarna Forest & Garden is listed in your Operator's Manual . Husqvarna Forest & not liable to cover failures of warranted parts caused by the Garden recommends that you retain all receipts covering use of add - on or modified parts . maintenance on your small off - road / nonroad engine , but Husqvarna Forest & Garden cannot deny warranty solely for HOW TO FILE A CLAIM the lack of receipts or for your failure to ensure the If you have any questions regarding your warranty rights and performance of all scheduled maintenance . responsibilities , you should contact your nearest authorized As the small off - road / nonroad engine owner , you should , servicing dealer or call Husqvarna Forest & Garden at however , be aware that Husqvarna Forest & Garden may 1 - 800 - 487 - 5963 . deny you warranty coverage if your small off - road / nonroad engine or a part of it has failed due to abuse , neglect , WHERE TO GET WARRANTY SERVICE improper maintenance , unapproved modifications or the use Warranty services or repairs shah be provided at all Husqvar - of parts not made or approved by the original equipment na Forest & Garden authorized servicing dealers . manufacturer . You are responsible for presenting your small off - road / nonroad engine to a Husqvarna Forest & Garden authorized MAINTENANCE , REPLACEMENT AND servicing dealer as soon as a problem exists . The warranty REPAIR OF EMISSION - RELATED PARTS repairs should be completed in a reasonable amount of time , Any Husqvarna Forest & Garden approved replacement part not to exceed 30 days . used in the performance of any warranty maintenance or If you have any questions regarding your warranty rights and repairs on emission - related parts , will be provided without responsibilities , you should contact your nearest authorized charge to the owner if the part is under warranty . servicing dealer or call Husqvarna Forest & Garden at 1 - 800 - 487 - 5963 . EMISSION CONTROL WARRANTY PARTS LIST 1 . Carburetor and internal parts WARRANTY COMMENCEMENT DATE 2 . Intake pipe , airfilter holder and carburetor bolts . The warranty period begins on the date small off - road / 3 . Airfilter and fuelfilter covered up to maintainance schedule . nonroad engine is delivered . 4 . Ignition System a ) Spark Plug , covered up to maintenance schedule LENGTH OF COVERAGE b ) Ignition Module Husqvarna Forest & Garden warrants to the initial owner and each subsequent purchaser that the engine is free from MAINTENANCE STATEMENT defects in materials and workmanship which cause the The owner is responsible for the performance of all required failure of a warranted part for a period of two years . maintenance , as defined in the operator's manual . Eng $ ish - 23
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