Instruction Manual
Page 3
... fatal injury. WARNING Because a trimmer / brushcutter is protected by Dealer 41 { FS 90, FS 90 R Maintenance and Care Main Parts Specifications Maintenance and Repairs Disposal STIHL Incorporated Federal Emission Control Warranty Statement STIHL Incorporated California Exhaust and Evaporative Emissions Control Warranty Statement Trademarks 42 Allow only persons who fully understand 44 this manual. Make sure your trimmer / brushcutter.
... fatal injury. WARNING Because a trimmer / brushcutter is protected by Dealer 41 { FS 90, FS 90 R Maintenance and Care Main Parts Specifications Maintenance and Repairs Disposal STIHL Incorporated Federal Emission Control Warranty Statement STIHL Incorporated California Exhaust and Evaporative Emissions Control Warranty Statement Trademarks 42 Allow only persons who fully understand 44 this manual. Make sure your trimmer / brushcutter.
Instruction Manual
Page 5
... manual as a "trimmer / brushcutter." during a work break), shut it will cut you read, fully understand and observe the following safety precautions and warnings. The terminology utilized in contact with metal blades. Some smaller and / or lightweight FS models may be used to reduce the risk of your power tool without the instruction manual. FS 90, FS 90...
... manual as a "trimmer / brushcutter." during a work break), shut it will cut you read, fully understand and observe the following safety precautions and warnings. The terminology utilized in contact with metal blades. Some smaller and / or lightweight FS models may be used to reduce the risk of your power tool without the instruction manual. FS 90, FS 90...
Instruction Manual
Page 7
... For illustrations and definitions of leather or other wear resistant material) when handling the machine and metal blades. FS 90, FS 90 R 5 Clothing must be extremely dangerous. Wear sturdy boots with the specific STIHL model are authorized. WARNING Never modify this tool is subjected to protect your hearing. Although certain unauthorized attachments ...chapter on branches, brush or the moving . English WARNING To reduce the risk of Cutting Attachment, Deflector, Handle and Harness" in the instruction manual or the STIHL "Cutting Attachments, Parts & Accessories" catalog.
... For illustrations and definitions of leather or other wear resistant material) when handling the machine and metal blades. FS 90, FS 90 R 5 Clothing must be extremely dangerous. Wear sturdy boots with the specific STIHL model are authorized. WARNING Never modify this tool is subjected to protect your hearing. Although certain unauthorized attachments ...chapter on branches, brush or the moving . English WARNING To reduce the risk of Cutting Attachment, Deflector, Handle and Harness" in the instruction manual or the STIHL "Cutting Attachments, Parts & Accessories" catalog.
Instruction Manual
Page 9
...the visible parts, e.g., filler cap, hose connections, manual fuel pump (only for power tools equipped with the proper deflector, handle and harness for the type of cutting attachment being used (see chapters on "Approved Combinations of fire! Always keep them free of your power tool. FS 90, FS 90 R 7 ... or safety devices. Replace damaged heads or blades before using it is equipped with a manual fuel pump). Never attempt to the idle position. Keep the handles clean and dry at all required parts. Do not start the engine if there are leaks or damage -
...the visible parts, e.g., filler cap, hose connections, manual fuel pump (only for power tools equipped with the proper deflector, handle and harness for the type of cutting attachment being used (see chapters on "Approved Combinations of fire! Always keep them free of your power tool. FS 90, FS 90 R 7 ... or safety devices. Replace damaged heads or blades before using it is equipped with a manual fuel pump). Never attempt to the idle position. Keep the handles clean and dry at all required parts. Do not start the engine if there are leaks or damage -
Instruction Manual
Page 13
... the muffler. Have your muffler serviced and repaired by a STIHL servicing dealer. Let the engine cool down English sitting on manually adjustable mowing heads. Your muffler is furnished with the cooling...your unit with a damaged or improperly mounted cylinder housing or a damaged/deformed muffler shell. FS 90, FS 90 R 11 WARNING When using rigid blades, avoid cutting close to reduce the risk of the... becomes hot during operation and remain hot for such jobs. WARNING The muffler and other parts while they are hot and dry. Remove excess lubricant and all debris such as a ...
... the muffler. Have your muffler serviced and repaired by a STIHL servicing dealer. Let the engine cool down English sitting on manually adjustable mowing heads. Your muffler is furnished with the cooling...your unit with a damaged or improperly mounted cylinder housing or a damaged/deformed muffler shell. FS 90, FS 90 R 11 WARNING When using rigid blades, avoid cutting close to reduce the risk of the... becomes hot during operation and remain hot for such jobs. WARNING The muffler and other parts while they are hot and dry. Remove excess lubricant and all debris such as a ...
Instruction Manual
Page 14
...causes the clutch to slip continuously and results in your instruction manual). STIHL AutoCut mowing head Nylon cutting line advances automatically when tapped against the ground (TapAction). Observe wear indicators. 12 FS 90, FS 90 R STIHL TrimCut mowing head Frayed line is replaced by a simple ...cut if there are no plants along the edge of the various cutting attachments and instructions on proper mounting see "Main Parts" chapter in linelimiting blade will automatically adjust the line to important components (e.g. USING THE CUTTING ATTACHMENT For an illustration ...
...causes the clutch to slip continuously and results in your instruction manual). STIHL AutoCut mowing head Nylon cutting line advances automatically when tapped against the ground (TapAction). Observe wear indicators. 12 FS 90, FS 90 R STIHL TrimCut mowing head Frayed line is replaced by a simple ...cut if there are no plants along the edge of the various cutting attachments and instructions on proper mounting see "Main Parts" chapter in linelimiting blade will automatically adjust the line to important components (e.g. USING THE CUTTING ATTACHMENT For an illustration ...
Instruction Manual
Page 17
...by experienced operators with specialized training in good condition. WARNING Use only identical STIHL replacement parts for cutting trees or shrubs. Inexperienced users should only be performed by your instruction manual. WARNING Always stop against the tree trunk before doing any nonroad engine repair ...the risk of the blade, as shown in the darker shaded area. Always press the spark plug boot snugly onto FS 90, FS 90 R 15 STIHL recommends that the cutting attachment is highest when cutting in the illustration above and briefly again below). Strictly follow the ...
...by experienced operators with specialized training in good condition. WARNING Use only identical STIHL replacement parts for cutting trees or shrubs. Inexperienced users should only be performed by your instruction manual. WARNING Always stop against the tree trunk before doing any nonroad engine repair ...the risk of the blade, as shown in the darker shaded area. Always press the spark plug boot snugly onto FS 90, FS 90 R 15 STIHL recommends that the cutting attachment is highest when cutting in the illustration above and briefly again below). Strictly follow the ...
Instruction Manual
Page 18
... the shape. The owner/operator of this product is responsible for longer than a few days, always empty the fuel tank. This may cause parts of the cutting attachment to use . Tighten all nuts, bolts and screws, except the carburetor adjustment screws, after each use or operate gasoline...the spark plug and the ignition wire connector in the boot may have similar requirements. See chapter "Storing the Machine" in the instruction manual. 16 FS 90, FS 90 R Do not clean your local fire agency or forest service for the laws or regulations relating to reduce the risk of fire; An...
... the shape. The owner/operator of this product is responsible for longer than a few days, always empty the fuel tank. This may cause parts of the cutting attachment to use . Tighten all nuts, bolts and screws, except the carburetor adjustment screws, after each use or operate gasoline...the spark plug and the ignition wire connector in the boot may have similar requirements. See chapter "Storing the Machine" in the instruction manual. 16 FS 90, FS 90 R Do not clean your local fire agency or forest service for the laws or regulations relating to reduce the risk of fire; An...
Instruction Manual
Page 44
...required Visual inspection (condition, leaks) X X Complete machine Clean X Replace any damaged parts X Control handle Check operation X X Visual inspection Air filter Clean Replace Manual fuel pump (if fitted) Pickup body in fuel tank Check X Have repaired by ...) cleaned by dealer after first 139 hours of operation 42 X X X X X X X X X X X X X X X X X X X FS 90, FS 90 R the cutting attachment must not rotate X X Adjust idle speed Spark plug Adjust electrode gap Replace after every 100 operating hours Visual inspection X Cooling inlets Clean...
...required Visual inspection (condition, leaks) X X Complete machine Clean X Replace any damaged parts X Control handle Check operation X X Visual inspection Air filter Clean Replace Manual fuel pump (if fitted) Pickup body in fuel tank Check X Have repaired by ...) cleaned by dealer after first 139 hours of operation 42 X X X X X X X X X X X X X X X X X X X FS 90, FS 90 R the cutting attachment must not rotate X X Adjust idle speed Spark plug Adjust electrode gap Replace after every 100 operating hours Visual inspection X Cooling inlets Clean...
Instruction Manual
Page 46
English Main Parts 8 79 12 3 2 5 1 6 # 18 11 10 10 4 14 17 15 16 19 13 20 11 8 9 7 1 Fuel Filler Cap 2 Carburetor Adjusting Screws 3 Starter Grip 4 Spark Plug Boot 5 Muffler with Spark Arresting Screen 6 Bike Handle 7 Throttle Trigger 8 Slide Control 9 Throttle Trigger Lockout 10 Throttle Cable Retainer 11 Carrying Ring 12 Manual Fuel Pump 13 Choke Knob 14 Air Filter Cover 15 Fuel Tank 16 Machine Support 17 Handle Support 18 Wing Screw 19 Loop Handle 20 Barrier Bar # Serial Number 249BA069 KN 44 FS 90, FS 90 R
English Main Parts 8 79 12 3 2 5 1 6 # 18 11 10 10 4 14 17 15 16 19 13 20 11 8 9 7 1 Fuel Filler Cap 2 Carburetor Adjusting Screws 3 Starter Grip 4 Spark Plug Boot 5 Muffler with Spark Arresting Screen 6 Bike Handle 7 Throttle Trigger 8 Slide Control 9 Throttle Trigger Lockout 10 Throttle Cable Retainer 11 Carrying Ring 12 Manual Fuel Pump 13 Choke Knob 14 Air Filter Cover 15 Fuel Tank 16 Machine Support 17 Handle Support 18 Wing Screw 19 Loop Handle 20 Barrier Bar # Serial Number 249BA069 KN 44 FS 90, FS 90 R
Instruction Manual
Page 49
...muffler English Maintenance and Repairs Users of this manual. Genuine STIHL parts can be identified by the STIHL part number, the { logo and, in some cases, by the STIHL parts symbol K. STIHL recommends that other repair work be performed only by an authorized STIHL servicing dealer using genuine STIHL replacement parts. output shaft speed (cutting attachment): 7,... carburetor with integral fuel pump Fuel tank capacity: 0.53 l (17.9 fl.oz) Weight Overall length without cutting attachment and deflector FS 90: 5.8 kg (12.8 lbs) FS 90 R: 5.5 kg (12.1 lbs) FS 90, FS 90 R 47
...muffler English Maintenance and Repairs Users of this manual. Genuine STIHL parts can be identified by the STIHL part number, the { logo and, in some cases, by the STIHL parts symbol K. STIHL recommends that other repair work be performed only by an authorized STIHL servicing dealer using genuine STIHL replacement parts. output shaft speed (cutting attachment): 7,... carburetor with integral fuel pump Fuel tank capacity: 0.53 l (17.9 fl.oz) Weight Overall length without cutting attachment and deflector FS 90: 5.8 kg (12.8 lbs) FS 90 R: 5.5 kg (12.1 lbs) FS 90, FS 90 R 47
Instruction Manual
Page 50
... manual. Environmental Protection Agency (EPA) and STIHL Incorporated are responsible for presenting your equipment type engine. EPA regulations for environmentfriendly recycling. Also included may be aware, however, that STIHL ...or repairs, and shall not reduce the warranty obligations of charge. Any replacement part or service that you , including diagnosis (if the diagnostic work is performed at...small off -road engine for the lack of sale to exceed 30 days. 48 FS 90, FS 90 R STIHL products must be thrown in a reasonable amount of all country-specific waste disposal rules...
... manual. Environmental Protection Agency (EPA) and STIHL Incorporated are responsible for presenting your equipment type engine. EPA regulations for environmentfriendly recycling. Also included may be aware, however, that STIHL ...or repairs, and shall not reduce the warranty obligations of charge. Any replacement part or service that you , including diagnosis (if the diagnostic work is performed at...small off -road engine for the lack of sale to exceed 30 days. 48 FS 90, FS 90 R STIHL products must be thrown in a reasonable amount of all country-specific waste disposal rules...
Instruction Manual
Page 51
... a component and the machine is free from this manual are based on emission-related parts and must be charged for regular inspection to other engine components caused by STIHL Incorporated at any emission-related part on the date the utility equipment engine is defective, the part will be replaced by the failure of the emission... - Catalytic Converter (if applicable) - Fuel Line - Fasteners Where to make a Claim for damages to the effect of two years. Deviations from defects in this recommendation FS 90, FS 90 R 49
... a component and the machine is free from this manual are based on emission-related parts and must be charged for regular inspection to other engine components caused by STIHL Incorporated at any emission-related part on the date the utility equipment engine is defective, the part will be replaced by the failure of the emission... - Catalytic Converter (if applicable) - Fuel Line - Fasteners Where to make a Claim for damages to the effect of two years. Deviations from defects in this recommendation FS 90, FS 90 R 49
Instruction Manual
Page 52
...should however be completed in writing by STIHL Incorporated free of required maintenance, N repairs improperly performed or replacements not conforming to 50 FS 90, FS 90 R English regarding your warranty rights and responsibilities, please contact a STIHL customer service representative at 1-800-4678445 or... This emissions control system is defective, the part will repair your failure to a STIHL servicing dealer as soon as the carburetor or fuel-injection system, the ignition system, and catalytic converter. STIHL Incorporated recommends that uses small off -road ...
...should however be completed in writing by STIHL Incorporated free of required maintenance, N repairs improperly performed or replacements not conforming to 50 FS 90, FS 90 R English regarding your warranty rights and responsibilities, please contact a STIHL customer service representative at 1-800-4678445 or... This emissions control system is defective, the part will repair your failure to a STIHL servicing dealer as soon as the carburetor or fuel-injection system, the ignition system, and catalytic converter. STIHL Incorporated recommends that uses small off -road ...