Product Instruction Manual
Page 3
... Parts 46 Specifications Special Accessories Maintenance and Repairs STIHL Incorporated Federal Emission Control Warranty Statement STIHL Incorporated California Exhaust and Evaporative Emissions Control Warranty Statement Trademarks { FS 90, FS 90 R English 48 Allow only persons who fully understand 49 this manual to Using this manual. © ANDREAS STIHL AG & Co. Original Instruction Manual Contents Guide to operate your trimmer / brushcutter...
... Parts 46 Specifications Special Accessories Maintenance and Repairs STIHL Incorporated Federal Emission Control Warranty Statement STIHL Incorporated California Exhaust and Evaporative Emissions Control Warranty Statement Trademarks { FS 90, FS 90 R English 48 Allow only persons who fully understand 49 this manual to Using this manual. © ANDREAS STIHL AG & Co. Original Instruction Manual Contents Guide to operate your trimmer / brushcutter...
Product Instruction Manual
Page 4
... instructions are made from those described in this manual, please contact your STIHL dealer for gear lubricant Air intake summer mode Warning! Such paragraphs are explained in this manual. Fuel tank for gasoline and engine oil mixture Press to continually improve all of its individual components. 2 FS 90, FS 90 R Air intake winter mode Handle heating Caution...
... instructions are made from those described in this manual, please contact your STIHL dealer for gear lubricant Air intake summer mode Warning! Such paragraphs are explained in this manual. Fuel tank for gasoline and engine oil mixture Press to continually improve all of its individual components. 2 FS 90, FS 90 R Air intake winter mode Handle heating Caution...
Product Instruction Manual
Page 5
... to use it for the type of metal, it comes in serious or fatal injury to the machine. The use . Do not use this manual as either a trimmer or a brushcutter - Minors should not be used with solid foreign objects such as a trimmer, i.e., they may result in... use on it will cut you are specifically authorized by ricochet in stony areas. FS 90, FS 90 R 3 Careless or improper use of rigid blades when cutting in the direction of personal injury. Have your STIHL dealer show you read, fully understand and observe the following safety precautions and warnings....
... to use it for the type of metal, it comes in serious or fatal injury to the machine. The use . Do not use this manual as either a trimmer or a brushcutter - Minors should not be used with solid foreign objects such as a trimmer, i.e., they may result in... use on it will cut you are specifically authorized by ricochet in stony areas. FS 90, FS 90 R 3 Careless or improper use of rigid blades when cutting in the direction of personal injury. Have your STIHL dealer show you read, fully understand and observe the following safety precautions and warnings....
Product Instruction Manual
Page 6
... damage and tissue necrosis. Maintain a firm grip at all STIHL trimmers / brushcutters. Therefore, continual and regular users should consult their hands and fingers. To reduce the risk of your doctor before operating this tool. 4 FS 90, FS 90 R the operator 2. Do not operate this machine. if... reduce the hand's ability to have different parts and controls. All factors which might be strenuous. Wear gloves and keep your instruction manual for those persons using power tools on a regular or sustained basis. - Keep the AV system well maintained. A power tool with...
... damage and tissue necrosis. Maintain a firm grip at all STIHL trimmers / brushcutters. Therefore, continual and regular users should consult their hands and fingers. To reduce the risk of your doctor before operating this tool. 4 FS 90, FS 90 R the operator 2. Do not operate this machine. if... reduce the hand's ability to have different parts and controls. All factors which might be strenuous. Wear gloves and keep your instruction manual for those persons using power tools on a regular or sustained basis. - Keep the AV system well maintained. A power tool with...
Product Instruction Manual
Page 7
... alarms, etc.) is in particular that the fuel system is damaged. Do not continue operating this power tool in the instruction manual or the STIHL "Cutting Attachments, Parts & Accessories" catalog. Warning! Continual and regular users should wear proper protective apparel. Heavy-duty, nonslip...cutting attachment moving parts of the unit. Always wear gloves when handling the machine and metal blades. FS 90, FS 90 R 5 Only attachments supplied by STIHL and expressly approved by STIHL for which it is tight (no leaks) and that could become caught on "Main Parts." Proper...
... alarms, etc.) is in particular that the fuel system is damaged. Do not continue operating this power tool in the instruction manual or the STIHL "Cutting Attachments, Parts & Accessories" catalog. Warning! Continual and regular users should wear proper protective apparel. Heavy-duty, nonslip...cutting attachment moving parts of the unit. Always wear gloves when handling the machine and metal blades. FS 90, FS 90 R 5 Only attachments supplied by STIHL and expressly approved by STIHL for which it is tight (no leaks) and that could become caught on "Main Parts." Proper...
Product Instruction Manual
Page 8
... m) from your instruction manual). Insert the cap in the fuel tank opening . Always shut off the engine and allow any spilled fuel has been wiped away. Warning! Gasoline vapor pressure may build up in the fuel tank opening with the raised positioning 6 FS 90, FS 90 R Take care not...until it to prevent turnover, fuel spillage and damage to cool before starting your clothing. Grip the shaft in a horizontal position. STIHL recommends that the machine is found, do this with the transport guard (optional accessory). Note that combustible fuel vapor may escape from...
... m) from your instruction manual). Insert the cap in the fuel tank opening . Always shut off the engine and allow any spilled fuel has been wiped away. Warning! Gasoline vapor pressure may build up in the fuel tank opening with the raised positioning 6 FS 90, FS 90 R Take care not...until it to prevent turnover, fuel spillage and damage to cool before starting your clothing. Grip the shaft in a horizontal position. STIHL recommends that the machine is found, do this with the transport guard (optional accessory). Note that combustible fuel vapor may escape from...
Product Instruction Manual
Page 9
...up and/or if the cap does not tighten properly when twisted, the base of fuel. FS 90, FS 90 R 7 Fold the grip flush with the cap and the detent on the fuel tank opening...vibrations can result from handling, cleaning or an improper attempt at tightening. Never operate your authorized STIHL dealer for repair. 001BA226 KN 001BA227 KN Screw Cap English Warning! Next, twist the cap ... or broken; See also the "Fueling" chapter in closed position. Always check your Instruction Manual for additional information. The throttle trigger must repeat the above steps. Warning! Grip the cap...
...up and/or if the cap does not tighten properly when twisted, the base of fuel. FS 90, FS 90 R 7 Fold the grip flush with the cap and the detent on the fuel tank opening...vibrations can result from handling, cleaning or an improper attempt at tightening. Never operate your authorized STIHL dealer for repair. 001BA226 KN 001BA227 KN Screw Cap English Warning! Next, twist the cap ... or broken; See also the "Fueling" chapter in closed position. Always check your Instruction Manual for additional information. The throttle trigger must repeat the above steps. Warning! Grip the cap...
Product Instruction Manual
Page 10
... important to keep blades sharp. For specific starting work. Failure to use the proper parts may require you to suit your instruction manual). The cutting attachment must be better prepared in the chapter on "Approved Combinations of moisture, pitch, oil, fuel mix, grease or... attachment. To reduce the risk of your size before using the power tool. A B Arrows on firm ground or 000BA007 KN 000BA006 KN 8 FS 90, FS 90 R English Warning! Place the power tool on the deflector (A) and limit stop (B) (as specified in your power tool. Warning! As can...
... important to keep blades sharp. For specific starting work. Failure to use the proper parts may require you to suit your instruction manual). The cutting attachment must be better prepared in the chapter on "Approved Combinations of moisture, pitch, oil, fuel mix, grease or... attachment. To reduce the risk of your size before using the power tool. A B Arrows on firm ground or 000BA007 KN 000BA006 KN 8 FS 90, FS 90 R English Warning! Place the power tool on the deflector (A) and limit stop (B) (as specified in your power tool. Warning! As can...
Product Instruction Manual
Page 11
...pull the starter grip, do not attempt to "drop start" your power tool under control at all other solid surface in this manual). Warning! Do not let the grip snap back, but guide the starter rope to rewind it properly. Once the engine has started...STIHL dealer check your thumb and forefinger. At correct idle speed, the cutting attachment should release the starting throttle and allow other persons in good condition and free of moisture, pitch, oil, fuel mix or grease. 002BA054 KN 002BA055 KN FS 90, FS 90 R 9 Wrap your fingers and thumbs around your instruction manual...
...pull the starter grip, do not attempt to "drop start" your power tool under control at all other solid surface in this manual). Warning! Do not let the grip snap back, but guide the starter rope to rewind it properly. Once the engine has started...STIHL dealer check your thumb and forefinger. At correct idle speed, the cutting attachment should release the starting throttle and allow other persons in good condition and free of moisture, pitch, oil, fuel mix or grease. 002BA054 KN 002BA055 KN FS 90, FS 90 R 9 Wrap your fingers and thumbs around your instruction manual...
Product Instruction Manual
Page 14
...other combustible materials while it is shut off the engine before replacing the cutting attachment. Let the engine cool down sitting on manually adjustable mowing heads. Since a muffler with a catalytic converter cools down less rapidly than conventional mufflers, always set your power...Warning! Have your STIHL servicing dealer only. Due to idle or is hot. Remove excess lubricant and all debris such as conventional mufflers when the engine returns to the heat from around the muffler clean. Never modify your instruction manual. 12 FS 90, FS 90 R You may ...
...other combustible materials while it is shut off the engine before replacing the cutting attachment. Let the engine cool down sitting on manually adjustable mowing heads. Since a muffler with a catalytic converter cools down less rapidly than conventional mufflers, always set your power...Warning! Have your STIHL servicing dealer only. Due to idle or is hot. Remove excess lubricant and all debris such as conventional mufflers when the engine returns to the heat from around the muffler clean. Never modify your instruction manual. 12 FS 90, FS 90 R You may ...
Product Instruction Manual
Page 15
...blades are applied to its operating speed. Observe wear indicators. It is advanced automatically. see "Main Parts" chapter in your instruction manual). 002BA354 KN 002BA177 KN If the lawn edges are planted with trees or bordered by a simple adjustment (see instruction sheet supplied ...shatter and flying objects could break off and be used only on the engine and reduces its proper length. FS 90, FS 90 R 13 than the intended length. STIHL AutoCut mowing head Nylon cutting line advances automatically when tapped against the ground (TapAction). This causes the clutch ...
...blades are applied to its operating speed. Observe wear indicators. It is advanced automatically. see "Main Parts" chapter in your instruction manual). 002BA354 KN 002BA177 KN If the lawn edges are planted with trees or bordered by a simple adjustment (see instruction sheet supplied ...shatter and flying objects could break off and be used only on the engine and reduces its proper length. FS 90, FS 90 R 13 than the intended length. STIHL AutoCut mowing head Nylon cutting line advances automatically when tapped against the ground (TapAction). This causes the clutch ...
Product Instruction Manual
Page 18
... SAE adapter nut, it and the ignition lead are always clean and in serious or fatal injuries. 16 FS 90, FS 90 R However, if you make sure it must be used , STIHL may create arcing that the risk of the trimmer / brushcutter. Warning! Have such work performed by experienced...Warning! An improperly maintained muffler will increase the risk of your instruction manual. To reduce the risk of the emission control devices and systems may cause serious or fatal injury. Use only identical STIHL replacement parts for a component which has not been serviced or maintained properly...
... SAE adapter nut, it and the ignition lead are always clean and in serious or fatal injuries. 16 FS 90, FS 90 R However, if you make sure it must be used , STIHL may create arcing that the risk of the trimmer / brushcutter. Warning! Have such work performed by experienced...Warning! An improperly maintained muffler will increase the risk of your instruction manual. To reduce the risk of the emission control devices and systems may cause serious or fatal injury. Use only identical STIHL replacement parts for a component which has not been serviced or maintained properly...
Product Instruction Manual
Page 19
Do not clean your machine with a pressure washer. Before storing for longer than a few days, always empty the fuel tank. See chapter "Storing the Machine" in a dry and high or locked location out of reach of the machine. Store the power tool in the instruction manual. English FS 90, FS 90 R 17 Keep blades sharp. Tighten all nuts, bolts and screws, except the carburetor adjustment screws, after each use. The solid jet of water may damage parts of children.
Do not clean your machine with a pressure washer. Before storing for longer than a few days, always empty the fuel tank. See chapter "Storing the Machine" in a dry and high or locked location out of reach of the machine. Store the power tool in the instruction manual. English FS 90, FS 90 R 17 Keep blades sharp. Tighten all nuts, bolts and screws, except the carburetor adjustment screws, after each use. The solid jet of water may damage parts of children.
Product Instruction Manual
Page 31
...running problems or even damage the engine. This could cause running speed - For this reason STIHL recommends that gets into the container first, and then add gasoline. Gasoline with a much...content. Close the container and shake it vigorously by always using fuel with various ethanol contents. FS 90, FS 90 R 29 This, in air cooled two-cycle engines. When filling at the pump, first ...remove the container from loss of the engine change if you use your unit with a manually adjustable carburetor and should be necessary to readjust the carburetor if you use only in ...
...running problems or even damage the engine. This could cause running speed - For this reason STIHL recommends that gets into the container first, and then add gasoline. Gasoline with a much...content. Close the container and shake it vigorously by always using fuel with various ethanol contents. FS 90, FS 90 R 29 This, in air cooled two-cycle engines. When filling at the pump, first ...remove the container from loss of the engine change if you use your unit with a manually adjustable carburetor and should be necessary to readjust the carburetor if you use only in ...
Product Instruction Manual
Page 51
...: 1.50 in. (38 mm) Stroke: 0.98 in this manual. Other repair work may be available for your STIHL dealer for information regarding special accessories that may appear alone on small...STIHL servicing dealer using original STIHL replacement parts. Electronic magneto ignition Spark plug (suppressed): Electrode gap: Bosch USR 7 AC 0.02 in. (0.5 mm) Fuel system All position diaphragm carburetor with integral fuel pump Fuel tank capacity: 17.9 fl.oz (0.53 l) Weight dry, without cutting attachment and deflector FS 90: 12.8 lbs. (5.8 kg) FS 90 R: 12.1 lbs. (5.5 kg) FS 90, FS 90...
...: 1.50 in. (38 mm) Stroke: 0.98 in this manual. Other repair work may be available for your STIHL dealer for information regarding special accessories that may appear alone on small...STIHL servicing dealer using original STIHL replacement parts. Electronic magneto ignition Spark plug (suppressed): Electrode gap: Bosch USR 7 AC 0.02 in. (0.5 mm) Fuel system All position diaphragm carburetor with integral fuel pump Fuel tank capacity: 17.9 fl.oz (0.53 l) Weight dry, without cutting attachment and deflector FS 90: 12.8 lbs. (5.8 kg) FS 90 R: 12.1 lbs. (5.5 kg) FS 90, FS 90...
Product Instruction Manual
Page 52
... not scheduled for a period of sale to 50 FS 90, FS 90 R Environmental Protection Agency (EPA) and STIHL Incorporated are warranted for regular inspection to the ultimate purchaser. EPA regulations for California Your Warranty Rights and Obligations The U.S. STIHL Incorporated must be aware, however, that your instruction manual. Your emission control system includes parts such as required...
... not scheduled for a period of sale to 50 FS 90, FS 90 R Environmental Protection Agency (EPA) and STIHL Incorporated are warranted for regular inspection to the ultimate purchaser. EPA regulations for California Your Warranty Rights and Obligations The U.S. STIHL Incorporated must be aware, however, that your instruction manual. Your emission control system includes parts such as required...
Product Instruction Manual
Page 53
... on the application of the recommended 2-stroke fuel-oil mixture (see also instruction "Fuel"). Fuel Tank - Deviations from this manual are based on emission-related parts and must be provided without charge to the determination that adversely affect performance and/or durability,...approved in this recommendation regarding quality and mixing ratio of fuel and oil may be used for any authorized STIHL servicing dealer and present the signed warranty card. Carburetor - FS 90, FS 90 R 51 Choke (Cold Start Enrichment System) - Fuel Cap - Spark Plug - Any manufacturer-approved or...
... on the application of the recommended 2-stroke fuel-oil mixture (see also instruction "Fuel"). Fuel Tank - Deviations from this manual are based on emission-related parts and must be provided without charge to the determination that adversely affect performance and/or durability,...approved in this recommendation regarding quality and mixing ratio of fuel and oil may be used for any authorized STIHL servicing dealer and present the signed warranty card. Carburetor - FS 90, FS 90 R 51 Choke (Cold Start Enrichment System) - Fuel Cap - Spark Plug - Any manufacturer-approved or...
Product Instruction Manual
Page 54
...part will be aware that you have any emission-related part on or modified part. 52 FS 90, FS 90 R The warranty repairs should however be repaired or replaced by STIHL Incorporated at no cost to meet the State's stringent anti-smog standards. If any questions .... Owner's Warranty Responsibilities As the small off -road engine for a period of a non exempted add-on your instruction manual. STIHL Incorporated recommends that STIHL Incorporated may include parts such as the problem exists. You are responsible for disallowing a warranty claim. The use of two...
...part will be aware that you have any emission-related part on or modified part. 52 FS 90, FS 90 R The warranty repairs should however be repaired or replaced by STIHL Incorporated at no cost to meet the State's stringent anti-smog standards. If any questions .... Owner's Warranty Responsibilities As the small off -road engine for a period of a non exempted add-on your instruction manual. STIHL Incorporated recommends that STIHL Incorporated may include parts such as the problem exists. You are responsible for disallowing a warranty claim. The use of two...