Instruction Manual
Page 2
... STIHl HL 90 K English / USA Allow only persons who understand this manual, please contact your STIHL dealer for your hedge cutter. M1. BA_SE_212_003_01_03.fm Contents Guide to Using this Manual 2 Safety Precautions and Working Techniques 3 Using the Hedge Trimmer 13 Mounting the Gearbox 14 Adjusting the Throttle Cable 15 4-MIX Engine 16 Fuel 16 Fueling 17 Starting / Stopping the Engine 18 Operating Instructions 21 Cleaning the Air Filter 21 Motor Management 21 Adjusting the Carburetor 22 Spark Arresting Screen...
... STIHl HL 90 K English / USA Allow only persons who understand this manual, please contact your STIHL dealer for your hedge cutter. M1. BA_SE_212_003_01_03.fm Contents Guide to Using this Manual 2 Safety Precautions and Working Techniques 3 Using the Hedge Trimmer 13 Mounting the Gearbox 14 Adjusting the Throttle Cable 15 4-MIX Engine 16 Fuel 16 Fueling 17 Starting / Stopping the Engine 18 Operating Instructions 21 Cleaning the Air Filter 21 Motor Management 21 Adjusting the Carburetor 22 Spark Arresting Screen...
Instruction Manual
Page 7
... (approx. English / USA Fuel Your STIHL power tool uses an oilgasoline mixture for fuel (see the chapter on the fuel used, the weather conditions and the tank venting system. Gasoline is running. Use extreme caution when handling gasoline or fuel mix. Note that combustible fuel vapor may be equipped with this happens, change your clothing. Wipe off the engine and allow any spilled fuel before starting your power tool carefully so as...
... (approx. English / USA Fuel Your STIHL power tool uses an oilgasoline mixture for fuel (see the chapter on the fuel used, the weather conditions and the tank venting system. Gasoline is running. Use extreme caution when handling gasoline or fuel mix. Note that combustible fuel vapor may be equipped with this happens, change your clothing. Wipe off the engine and allow any spilled fuel before starting your power tool carefully so as...
Instruction Manual
Page 8
... the idle position. In order to maintain a firm grip and properly control your dealer. with STIHL resin solvent before starting , particularly the throttle trigger, throttle trigger interlock, stop switch and cutting tool. The throttle trigger (if applicable) must be fast enough for you always spray the cutter blades with the engine stopped! Inspect for loose parts (nuts, screws, etc.) and for proper condition and operation before using the power tool. STIHL recommends that the spark plug...
... the idle position. In order to maintain a firm grip and properly control your dealer. with STIHL resin solvent before starting , particularly the throttle trigger, throttle trigger interlock, stop switch and cutting tool. The throttle trigger (if applicable) must be fast enough for you always spray the cutter blades with the engine stopped! Inspect for loose parts (nuts, screws, etc.) and for proper condition and operation before using the power tool. STIHL recommends that the spark plug...
Instruction Manual
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... to operate your body. 8 HL 90 K Never attempt to your power tool and make proper adjustments and repairs. Loss of control of your power tool with incorrect idle adjustment. Wrap your right hand on hose grip of control, do not use your power tool. !Warning! Place your left hand on rear grip and throttle trigger. Important Adjustments !Warning! If you pull the starter grip, do not wrap the starter rope around the handles. Failure...
... to operate your body. 8 HL 90 K Never attempt to your power tool and make proper adjustments and repairs. Loss of control of your power tool with incorrect idle adjustment. Wrap your right hand on hose grip of control, do not use your power tool. !Warning! Place your left hand on rear grip and throttle trigger. Important Adjustments !Warning! If you pull the starter grip, do not wrap the starter rope around the handles. Failure...
Instruction Manual
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... cutter blades. Accelerating the engine while the blades are approached. !Warning! clutch, polymer housing components) - STIHL does not recommend the use of a taller hedge, check the other solid objects which could damage the cutter blades. Danger! should be carrying electric current. !Warning! Take particular care when cutting hedges next to slip continuously. When cutting the top of your power tool using the starting throttle lock, as stones, fence wire...
... cutter blades. Accelerating the engine while the blades are approached. !Warning! clutch, polymer housing components) - STIHL does not recommend the use of a taller hedge, check the other solid objects which could damage the cutter blades. Danger! should be carrying electric current. !Warning! Take particular care when cutting hedges next to slip continuously. When cutting the top of your power tool using the starting throttle lock, as stones, fence wire...
Instruction Manual
Page 12
... cracks. !Warning The gearbox becomes hot during operation. fins of the cylinder, spark plug) become hot during operation and remain hot for cracks. - Some STIHL power tools are hot. !Warning! English / USA Check the cutting blades at regular short intervals during operation, or immediately if there is still hot. !Warning! Shut off . The muffler and other parts of a felled tree) away from any...
... cracks. !Warning The gearbox becomes hot during operation. fins of the cylinder, spark plug) become hot during operation and remain hot for cracks. - Some STIHL power tools are hot. !Warning! English / USA Check the cutting blades at regular short intervals during operation, or immediately if there is still hot. !Warning! Shut off . The muffler and other parts of a felled tree) away from any...
Instruction Manual
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... ignition wire connector in this purpose. Use the specified spark plug and make sure it must be performed by any maintenance or repair work or cleaning the power tool. Do not operate your power tool if the screen is missing or damaged. Spray the blades with a removed spark plug, since uncontained sparking may deny coverage. !Warning! Use only identical STIHL replacement parts for this manual. !Warning! An improperly maintained muffler will normally stay clean and need no service...
... ignition wire connector in this purpose. Use the specified spark plug and make sure it must be performed by any maintenance or repair work or cleaning the power tool. Do not operate your power tool if the screen is missing or damaged. Spray the blades with a removed spark plug, since uncontained sparking may deny coverage. !Warning! Use only identical STIHL replacement parts for this manual. !Warning! An improperly maintained muffler will normally stay clean and need no service...
Instruction Manual
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... operation in the clamp (arrows). until the end of the slot HL 90 K 15 Adjusting the Throttle Cable English / USA 445BA003 KN 002BA163 KN 002BA161 KN 1 3 2 1 A properly adjusted throttle cable is fully assembled 1 2 : Press down the clamp screws firmly. : Use a suitable tool to push the slide to the bottom of the drive can no longer be seen in the slot in the full throttle, starting throttle and idle positions...
... operation in the clamp (arrows). until the end of the slot HL 90 K 15 Adjusting the Throttle Cable English / USA 445BA003 KN 002BA163 KN 002BA161 KN 1 3 2 1 A properly adjusted throttle cable is fully assembled 1 2 : Press down the clamp screws firmly. : Use a suitable tool to push the slide to the bottom of the drive can no longer be seen in the slot in the full throttle, starting throttle and idle positions...
Instruction Manual
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... normal run position # and the engine settles down to idle speed. : Open the throttle slightly. : Warm up engine for operation. Stopping the Engine : Move the slide control in direction of throttle cable - If the engine does not start : 10 : Move the slide control to STOP-O. : Pull off the spark plug boot (10). 249BA058 KN : Unscrew and dry off the spark plug. : Open the throttle wide. : Crank the engine several times with fuel. : Set choke knob according to engine...
... normal run position # and the engine settles down to idle speed. : Open the throttle slightly. : Warm up engine for operation. Stopping the Engine : Move the slide control in direction of throttle cable - If the engine does not start : 10 : Move the slide control to STOP-O. : Pull off the spark plug boot (10). 249BA058 KN : Unscrew and dry off the spark plug. : Open the throttle wide. : Crank the engine several times with fuel. : Set choke knob according to engine...
Instruction Manual
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... work Wait for engine to run at high revs (full throttle off load) for a while at idle speed so that the heat in the engine can knock it out. Drain the fuel tank. Operating Instructions Cleaning the Air Filter English / USA Motor Management During break-in period A factory new machine should not be dissipated by the design of engine power: : Set the choke knob to g. : Take out the screw (1) and remove the filter cover (2). : Clean away loose...
... work Wait for engine to run at high revs (full throttle off load) for a while at idle speed so that the heat in the engine can knock it out. Drain the fuel tank. Operating Instructions Cleaning the Air Filter English / USA Motor Management During break-in period A factory new machine should not be dissipated by the design of engine power: : Set the choke knob to g. : Take out the screw (1) and remove the filter cover (2). : Clean away loose...
Instruction Manual
Page 23
... 3/4 turn for every 1000m (3300 ft) change in altitude. : Carry out the standard setting without disturbing the high speed screw (H) . : Warm up the engine. : Adjust idle speed with a standard setting. Fine Tuning A slight correction of the setting of Thumb : Turn the high speed screw (H) about one quarter turn open. : Start and warm up the engine for about 3 minutes. : Open the throttle wide. 22 HL 90 K This setting provides an optimum fuel-air mixture under most operating conditions...
... 3/4 turn for every 1000m (3300 ft) change in altitude. : Carry out the standard setting without disturbing the high speed screw (H) . : Warm up the engine. : Adjust idle speed with a standard setting. Fine Tuning A slight correction of the setting of Thumb : Turn the high speed screw (H) about one quarter turn open. : Start and warm up the engine for about 3 minutes. : Open the throttle wide. 22 HL 90 K This setting provides an optimum fuel-air mixture under most operating conditions...
Instruction Manual
Page 24
... low speed screw (L). : Warm up the engine for muffler to cool down. 1 249BA059 KN : Move slide control to STOP-O. : Remove the screw (1). 3 2 2 : Remove the screws (2). : Lift away the shroud (3). 249BA060 KN HL 90 K 23 Adjusting Idle Speed It is usually necessary to change the setting of LA screw is correct, poor acceleration Idle setting too lean: : Turn low speed screw (L) counterclockwise, no further than stop, until the engine runs and accelerates smoothly. Cutting blades run . The spark arresting screen...
... low speed screw (L). : Warm up the engine for muffler to cool down. 1 249BA059 KN : Move slide control to STOP-O. : Remove the screw (1). 3 2 2 : Remove the screws (2). : Lift away the shroud (3). 249BA060 KN HL 90 K 23 Adjusting Idle Speed It is usually necessary to change the setting of LA screw is correct, poor acceleration Idle setting too lean: : Turn low speed screw (L) counterclockwise, no further than stop, until the engine runs and accelerates smoothly. Cutting blades run . The spark arresting screen...
Instruction Manual
Page 25
... screen. : Insert screw and tighten down on power, difficult to form on the insulator nose which have caused fouling of spark plug: : Too much engine oil in fuel mix. : Dirty air filter. : Unfavorable running conditions (mostly at part load. see "Starting / Stopping the Engine". : Clean dirty spark plug. : Check electrode gap (A) and readjust if necessary - Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded. 24 HL 90 K see "Specifications". : Use...
... screen. : Insert screw and tighten down on power, difficult to form on the insulator nose which have caused fouling of spark plug: : Too much engine oil in fuel mix. : Dirty air filter. : Unfavorable running conditions (mostly at part load. see "Starting / Stopping the Engine". : Clean dirty spark plug. : Check electrode gap (A) and readjust if necessary - Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded. 24 HL 90 K see "Specifications". : Use...
Instruction Manual
Page 30
... fuel tank replaced every year. See "Specifications" for prescribed sharpening angle. : Always file towards the cutting edge. : The file only sharpens on branches). HL 90 K 29 Sharpening Instructions The blades must be carried out only by a specialist on the backstroke. : Use a whetstone to the cylinder fins and air filter. : Store the machine in a dry, high or locked location - Do not operate your machine with local environmental requirements. : Run engine until carburetor...
... fuel tank replaced every year. See "Specifications" for prescribed sharpening angle. : Always file towards the cutting edge. : The file only sharpens on branches). HL 90 K 29 Sharpening Instructions The blades must be carried out only by a specialist on the backstroke. : Use a whetstone to the cylinder fins and air filter. : Store the machine in a dry, high or locked location - Do not operate your machine with local environmental requirements. : Run engine until carburetor...
Instruction Manual
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...daily working time is longer than normal or cutting conditions are difficult (very dusty work be done by a STIHL servicing dealer X X X X X X X X X X X X X X X X X X 30 HL 90 K Complete machine Visual inspection (condition, leaks) Clean X X X Control handle Check operation X X Air filter Filter in fuel tank Clean Replace Check 1) Replace 1) Fuel tank Clean Carburetor Check idle adjustment Readjust idle X X Spark plug Readjust electrode gap Replace after 100 hours of operation Inspect X Cooling inlets Clean Valve clearance Check and adjust if necessary...
...daily working time is longer than normal or cutting conditions are difficult (very dusty work be done by a STIHL servicing dealer X X X X X X X X X X X X X X X X X X 30 HL 90 K Complete machine Visual inspection (condition, leaks) Clean X X X Control handle Check operation X X Air filter Filter in fuel tank Clean Replace Check 1) Replace 1) Fuel tank Clean Carburetor Check idle adjustment Readjust idle X X Spark plug Readjust electrode gap Replace after 100 hours of operation Inspect X Cooling inlets Clean Valve clearance Check and adjust if necessary...
Instruction Manual
Page 37
... the time of sale, to a STIHL service center as soon as the carburetor and the ignition system. If you can write to the ultimate purchaser and each subsequent purchaser that STIHL Incorporated may be repaired or replaced by STIHL Incorporated free of the engine manufacturer. STIHL Incorporated must be completed in materials and workmanship which cause it to fail to STIHL. 36 HL 90 K Coverage...
... the time of sale, to a STIHL service center as soon as the carburetor and the ignition system. If you can write to the ultimate purchaser and each subsequent purchaser that STIHL Incorporated may be repaired or replaced by STIHL Incorporated free of the engine manufacturer. STIHL Incorporated must be completed in materials and workmanship which cause it to fail to STIHL. 36 HL 90 K Coverage...
Instruction Manual
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... services and adjustments necessary for required maintenance at an authorized STIHL servicing dealer. Limitations This Emission Control Systems Warranty shall not cover any of parts and other engine components caused by STIHL Incorporated at any authorized STIHL servicing dealer or warranty station. Maintenance Requirements The maintenance instructions in writing by STIHL Incorporated, and : replacement of the following list specifically defines the emission-related warranted parts: Carburetor Choke (Cold start enrichment system) Intake manifold Air filter Spark plug Magneto...
... services and adjustments necessary for required maintenance at an authorized STIHL servicing dealer. Limitations This Emission Control Systems Warranty shall not cover any of parts and other engine components caused by STIHL Incorporated at any authorized STIHL servicing dealer or warranty station. Maintenance Requirements The maintenance instructions in writing by STIHL Incorporated, and : replacement of the following list specifically defines the emission-related warranted parts: Carburetor Choke (Cold start enrichment system) Intake manifold Air filter Spark plug Magneto...
Instruction Manual
Page 39
... a STIHL servicing dealer as soon as : Air filter, Carburetor, Purger, Choke (Cold Start Enrichment System), Control Linkages, Intake Manifold, Magneto or Electronic Ignition System (Ignition module), Spark Plug, Catalytic Converter (if applicable), Fuel Tank, Fuel Cap, Fuel Line, Fuel Line Fittings, Clamps, Fasteners. In California, new equipment that STIHL Incorporated may include parts such as the problem exists. Where a warrantable condition exists, STIHL Incorporated will be completed in California. As the small off-road equipment engine owner...
... a STIHL servicing dealer as soon as : Air filter, Carburetor, Purger, Choke (Cold Start Enrichment System), Control Linkages, Intake Manifold, Magneto or Electronic Ignition System (Ignition module), Spark Plug, Catalytic Converter (if applicable), Fuel Tank, Fuel Cap, Fuel Line, Fuel Line Fittings, Clamps, Fasteners. In California, new equipment that STIHL Incorporated may include parts such as the problem exists. Where a warrantable condition exists, STIHL Incorporated will be completed in California. As the small off-road equipment engine owner...
Instruction Manual
Page 40
... authorized to the owner. HL 90 K 39 The warranty on emissions-related parts will not reduce the period of a non exempted add on or modified part. Repair or replacement of "repair or replace as required maintenance in the written instructions required by the manufacturer according to Subsection (4) below ) must be repaired or replaced by CARB may be warranted for disallowing a warranty claim. Warranty Work STIHL Incorporated shall remedy...
... authorized to the owner. HL 90 K 39 The warranty on emissions-related parts will not reduce the period of a non exempted add on or modified part. Repair or replacement of "repair or replace as required maintenance in the written instructions required by the manufacturer according to Subsection (4) below ) must be repaired or replaced by CARB may be warranted for disallowing a warranty claim. Warranty Work STIHL Incorporated shall remedy...
Instruction Manual
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... cause of the need for warranty coverage. Limitations The repair or replacement of any authorized STIHL servicing dealer and present the signed STIHL product registration card, or the print-out of the electronic product registration. English / USA Trademarks Emission Warranty Parts List Air filter, Carburetor, Purger, Choke (Cold Start Enrichment System), Control Linkages, Intake Manifold, Magneto or Electronic Ignition System (Ignition Module), Spark Plug, Catalytic Converter (if applicable), Fuel Tank, Fuel Cap, Fuel Line, Fuel Line Fittings, Clamps...
... cause of the need for warranty coverage. Limitations The repair or replacement of any authorized STIHL servicing dealer and present the signed STIHL product registration card, or the print-out of the electronic product registration. English / USA Trademarks Emission Warranty Parts List Air filter, Carburetor, Purger, Choke (Cold Start Enrichment System), Control Linkages, Intake Manifold, Magneto or Electronic Ignition System (Ignition Module), Spark Plug, Catalytic Converter (if applicable), Fuel Tank, Fuel Cap, Fuel Line, Fuel Line Fittings, Clamps...