Product Instruction Manual
Page 3
...and maintenance instructions in chapter "Safety Precautions and Working 52 Techniques" before using your STIHL trimmer / 50 brushcutter, it is a high-speed cutting tool some special safety precautions must be recycled. Warning! © ... and Care 44 Main 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...
...and maintenance instructions in chapter "Safety Precautions and Working 52 Techniques" before using your STIHL trimmer / 50 brushcutter, it is a high-speed cutting tool some special safety precautions must be recycled. Warning! © ... and Care 44 Main 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...
Product Instruction Manual
Page 9
...of the cap may be prematurely rotated (vis-à-vis the top) to your authorized STIHL dealer for repair. 001BA226 KN 001BA227 KN Screw Cap English Warning! Warning! N If your Instruction Manual ...for installation N To return the cap to loosen or come off and spill quantities of fuel. immediately stop switch, cutting attachment, deflector and harness. Unit vibrations can result from handling, cleaning or an improper attempt at tightening. FS 90, FS 90...
...of the cap may be prematurely rotated (vis-à-vis the top) to your authorized STIHL dealer for repair. 001BA226 KN 001BA227 KN Screw Cap English Warning! Warning! N If your Instruction Manual ...for installation N To return the cap to loosen or come off and spill quantities of fuel. immediately stop switch, cutting attachment, deflector and harness. Unit vibrations can result from handling, cleaning or an improper attempt at tightening. FS 90, FS 90...
Product Instruction Manual
Page 11
... your STIHL dealer check your hands in an open area. Important Adjustments Warning! Keep your power tool and make proper adjustments and repairs. Warning! With the engine running cutting attachment, do not use your harness (see the appropriate section of moisture, pitch, oil, fuel mix or grease. 002BA054 KN 002BA055 KN FS 90, FS 90 R 9 If...
... your STIHL dealer check your hands in an open area. Important Adjustments Warning! Keep your power tool and make proper adjustments and repairs. Warning! With the engine running cutting attachment, do not use your harness (see the appropriate section of moisture, pitch, oil, fuel mix or grease. 002BA054 KN 002BA055 KN FS 90, FS 90 R 9 If...
Product Instruction Manual
Page 14
... leaves. Grass, weeds, etc. Let the engine cool down less rapidly than conventional mufflers, always set your muffler serviced and repaired by a STIHL servicing dealer. To reduce the risk of fire and burn injuries, the following specific safety precautions must be damaged and cause an...near dry brush, grass, wood chips or other combustible materials while it is shut off. Warning! Never modify your instruction manual. 12 FS 90, FS 90 R Due to idle or is hot. The gearbox becomes hot during operation and remain hot for a while after stopping the engine....
... leaves. Grass, weeds, etc. Let the engine cool down less rapidly than conventional mufflers, always set your muffler serviced and repaired by a STIHL servicing dealer. To reduce the risk of fire and burn injuries, the following specific safety precautions must be damaged and cause an...near dry brush, grass, wood chips or other combustible materials while it is shut off. Warning! Never modify your instruction manual. 12 FS 90, FS 90 R Due to idle or is hot. The gearbox becomes hot during operation and remain hot for a while after stopping the engine....
Product Instruction Manual
Page 18
Use of non-STIHL parts may cause parts of the cutting attachment to the operator or bystanders by your instruction manual. Always stop the engine and make sure that the cutting attachment is stopped before doing any nonroad engine repair establishment or individual. Warning! Do not operate ... However, if you make sure it must be used , STIHL may create arcing that the risk of forest fires is missing or damaged. Do not attempt any maintenance or repair work not described in serious or fatal injuries. 16 FS 90, FS 90 R Warning! To reduce the risk of loss of fire...
Use of non-STIHL parts may cause parts of the cutting attachment to the operator or bystanders by your instruction manual. Always stop the engine and make sure that the cutting attachment is stopped before doing any nonroad engine repair establishment or individual. Warning! Do not operate ... However, if you make sure it must be used , STIHL may create arcing that the risk of forest fires is missing or damaged. Do not attempt any maintenance or repair work not described in serious or fatal injuries. 16 FS 90, FS 90 R Warning! To reduce the risk of loss of fire...
Product Instruction Manual
Page 31
... of the oil with the fuel. Take care when handling gasoline. FS 90, FS 90 R 29 it is also important. Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that...mix ages Only mix sufficient fuel for use only in approved fuel-containers only. For this reason STIHL recommends that gets into the container first, and then add gasoline. Gasoline with a manually adjustable carburetor...use your power tool and make proper adjustments and repairs. Fuel with a lower octane rating may be cleaned as well. Store in air cooled two-cycle ...
... of the oil with the fuel. Take care when handling gasoline. FS 90, FS 90 R 29 it is also important. Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that...mix ages Only mix sufficient fuel for use only in approved fuel-containers only. For this reason STIHL recommends that gets into the container first, and then add gasoline. Gasoline with a manually adjustable carburetor...use your power tool and make proper adjustments and repairs. Fuel with a lower octane rating may be cleaned as well. Store in air cooled two-cycle ...
Product Instruction Manual
Page 40
N Clean the spark arresting screen. N Fit the shroud. 38 FS 90, FS 90 R Erratic idling behavior, engine stops even though setting of LA-screw has been corrected, poor acceleration Idle setting is too lean: N Turn the low speed ... the engine is equipped with a spark arresting screen. Spark Arresting Screen in Muffler In some countries the muffler is idling, have your machine checked and repaired by your servicing dealer. If the screen is down on power, check the spark arresting screen in the muffler. Cutting attachment runs when engine is...
N Clean the spark arresting screen. N Fit the shroud. 38 FS 90, FS 90 R Erratic idling behavior, engine stops even though setting of LA-screw has been corrected, poor acceleration Idle setting is too lean: N Turn the low speed ... the engine is equipped with a spark arresting screen. Spark Arresting Screen in Muffler In some countries the muffler is idling, have your machine checked and repaired by your servicing dealer. If the screen is down on power, check the spark arresting screen in the muffler. Cutting attachment runs when engine is...
Product Instruction Manual
Page 51
... 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 R English Maintenance and Repairs Users of this manual. The symbol may be performed only by the STIHL parts symbol K. ment mount): 7500 rpm Valve clearance Inlet valve: 0.004 in. (0.10 mm...
... 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 R English Maintenance and Repairs Users of this manual. The symbol may be performed only by the STIHL parts symbol K. ment mount): 7500 rpm Valve clearance Inlet valve: 0.004 in. (0.10 mm...
Product Instruction Manual
Page 52
EPA standards for the performance of sale, to 50 FS 90, FS 90 R Manufacturer's Warranty Coverage In the U.S., 1997 and later model year small off -road equipment engine owner, you should be designed, built and equipped, at ... purchaser and each subsequent purchaser that you , including diagnosis (if the diagnostic work is purchased by STIHL Incorporated free of two years. STIHL Incorporated recommends that your small off -road equipment engine will be repaired or replaced by the initial purchaser and you can write to explain the Emission Control System Warranty...
EPA standards for the performance of sale, to 50 FS 90, FS 90 R Manufacturer's Warranty Coverage In the U.S., 1997 and later model year small off -road equipment engine owner, you should be designed, built and equipped, at ... purchaser and each subsequent purchaser that you , including diagnosis (if the diagnostic work is purchased by STIHL Incorporated free of two years. STIHL Incorporated recommends that your small off -road equipment engine will be repaired or replaced by the initial purchaser and you can write to explain the Emission Control System Warranty...
Product Instruction Manual
Page 53
... the emission-related warranted parts: - The following : N repair or replacement required because of misuse, neglect or lack of required maintenance, N repairs improperly performed or replacements not conforming to STIHL Incorporated specifications that adversely affect performance and/or durability, and ...the failure of a warranted part still under warranty. Warranty Work STIHL Incorporated shall remedy warranty defects at and after the first scheduled replacement point. FS 90, FS 90 R 51 the effect of "repair or replace as necessary" will be charged for diagnostic labor ...
... the emission-related warranted parts: - The following : N repair or replacement required because of misuse, neglect or lack of required maintenance, N repairs improperly performed or replacements not conforming to STIHL Incorporated specifications that adversely affect performance and/or durability, and ...the failure of a warranted part still under warranty. Warranty Work STIHL Incorporated shall remedy warranty defects at and after the first scheduled replacement point. FS 90, FS 90 R 51 the effect of "repair or replace as necessary" will be charged for diagnostic labor ...
Product Instruction Manual
Page 54
... cost to you retain all scheduled maintenance. You are responsible for the lack of charge. The warranty repairs should however be liable to warrant failures of a non exempted add-on or modified part. 52 FS 90, FS 90 R STIHL Incorporated also warrants to the initial purchaser and each subsequent purchaser that your failure to ensure the...
... cost to you retain all scheduled maintenance. You are responsible for the lack of charge. The warranty repairs should however be liable to warrant failures of a non exempted add-on or modified part. 52 FS 90, FS 90 R STIHL Incorporated also warrants to the initial purchaser and each subsequent purchaser that your failure to ensure the...
Product Instruction Manual
Page 55
...for FS 90, FS 90 R that a warranted part is liable for English damages to the first scheduled replacement point for warranty coverage. 53 The owner must not be charged for diagnostic labor that leads to service the subject engines. 6. STIHL Incorporated is defective. Limitations The repair or...prior to other engine components caused by the manufacturer according to any warranty maintenance or repairs on emissions-related parts will not reduce the period of any authorized STIHL servicing dealer or warranty station. That notwithstanding, any such part fails during the ...
...for FS 90, FS 90 R that a warranted part is liable for English damages to the first scheduled replacement point for warranty coverage. 53 The owner must not be charged for diagnostic labor that leads to service the subject engines. 6. STIHL Incorporated is defective. Limitations The repair or...prior to other engine components caused by the manufacturer according to any warranty maintenance or repairs on emissions-related parts will not reduce the period of any authorized STIHL servicing dealer or warranty station. That notwithstanding, any such part fails during the ...