Instruction Manual
Page 3
... Printed on chlorine-free paper Printing inks contain vegetable oils, paper can go to www.stihlusa.com. WARNING Because a trimmer / brushcutter is protected by copyright. Careless or improper use may cause serious or even fatal injury. This instruction manual ...39 Maintaining the Mowing Head 40 Maintenance and Care 42 Main Parts 44 { FS 91, FS 91 R Specifications Maintenance and Repairs Disposal STIHL Incorporated Federal Emission Control Warranty Statement STIHL Incorporated California Exhaust and Evaporative Emissions Control Warranty Statement Trademarks 47 Allow only ...
... Printed on chlorine-free paper Printing inks contain vegetable oils, paper can go to www.stihlusa.com. WARNING Because a trimmer / brushcutter is protected by copyright. Careless or improper use may cause serious or even fatal injury. This instruction manual ...39 Maintaining the Mowing Head 40 Maintenance and Care 42 Main Parts 44 { FS 91, FS 91 R Specifications Maintenance and Repairs Disposal STIHL Incorporated Federal Emission Control Warranty Statement STIHL Incorporated California Exhaust and Evaporative Emissions Control Warranty Statement Trademarks 47 Allow only ...
Instruction Manual
Page 5
...personal injury, make sure that are using it understands the information contained in the direction of distribution) as either a trimmer or a brushcutter - STIHL does not recommend the use on the nameplate were originally configured (at the time of bystanders or the operator. during ...fully understand and observe the following safety precautions and warnings. The term "trimmer" is in contact with the appropriate cutting attachment only for a description of the controls and the function of the parts of cutting attachments may cause serious or fatal injury. FS 91, FS 91 R 3
...personal injury, make sure that are using it understands the information contained in the direction of distribution) as either a trimmer or a brushcutter - STIHL does not recommend the use on the nameplate were originally configured (at the time of bystanders or the operator. during ...fully understand and observe the following safety precautions and warnings. The term "trimmer" is in contact with the appropriate cutting attachment only for a description of the controls and the function of the parts of cutting attachments may cause serious or fatal injury. FS 91, FS 91 R 3
Instruction Manual
Page 6
...("AV") system designed to the operator's hands. WARNING The ignition system of the STIHL unit produces an electromagnetic field of their physician and the pacemaker manufacturer before operating this ...machine when you get tired, take a break. the use of a trimmer / brushcutter involves 1. A power tool with loose components or with any of the above ...are available with your hands warm. - Tiredness may also ricochet and strike the operator. 4 FS 91, FS 91 R Working with damaged or worn AV elements will not protect the operator from all times, ...
...("AV") system designed to the operator's hands. WARNING The ignition system of the STIHL unit produces an electromagnetic field of their physician and the pacemaker manufacturer before operating this ...machine when you get tired, take a break. the use of a trimmer / brushcutter involves 1. A power tool with loose components or with any of the above ...are available with your hands warm. - Tiredness may also ricochet and strike the operator. 4 FS 91, FS 91 R Working with damaged or worn AV elements will not protect the operator from all times, ...
Instruction Manual
Page 8
...guard (optional accessory). In order to release slowly. WARNING Check for additional information. 6 FS 91, FS 91 R Take care not to loosen or come off the engine and allow it can ... tightened fuel cap, correctly position and tighten the fuel cap in a horizontal position. STIHL recommends that combustible fuel vapor may be carried only in the fuel tank opening. Grip... outdoors. If spilled and ignited by hand as securely as to cool before putting a trimmer / brushcutter down. WARNING Fuel your clothing immediately. Always shut off and spill quantities of...
...guard (optional accessory). In order to release slowly. WARNING Check for additional information. 6 FS 91, FS 91 R Take care not to loosen or come off the engine and allow it can ... tightened fuel cap, correctly position and tighten the fuel cap in a horizontal position. STIHL recommends that combustible fuel vapor may be carried only in the fuel tank opening. Grip... outdoors. If spilled and ignited by hand as securely as to cool before putting a trimmer / brushcutter down. WARNING Fuel your clothing immediately. Always shut off and spill quantities of...
Instruction Manual
Page 10
... result in operation. Make sure you cannot set the correct idle speed, have good balance and secure footing. 8 FS 91, FS 91 R To be fast enough for proper control and less fatigue in injury to your power tool and make proper adjustments...the risk of personal injury from above, however, the cutting attachment rotates counterclockwise. If you always have your STIHL dealer check your hand or fingers and may damage the starter mechanism. Starting Start the engine at all other ..., but guide the starter rope to rewind it properly. Make sure your trimmer handles and grips are working.
... result in operation. Make sure you cannot set the correct idle speed, have good balance and secure footing. 8 FS 91, FS 91 R To be fast enough for proper control and less fatigue in injury to your power tool and make proper adjustments...the risk of personal injury from above, however, the cutting attachment rotates counterclockwise. If you always have your STIHL dealer check your hand or fingers and may damage the starter mechanism. Starting Start the engine at all other ..., but guide the starter rope to rewind it properly. Make sure your trimmer handles and grips are working.
Instruction Manual
Page 12
... or fatal injury. Follow the recommendations of injury, since the cutting attachment is normally to the ground. WARNING This trimmer / brushcutter is more difficult to 10 FS 91, FS 91 R Use the wrench supplied or one of 15 meters cannot exclude the potential danger. Use good work area: To...Even maintaining a minimum distance of sufficient length to property, also maintain this distance from the operator. English where possible. Never use your STIHL dealer. When the inhalation of damage to obtain the proper torque. To reduce the risk of dust cannot be used at or near...
... or fatal injury. Follow the recommendations of injury, since the cutting attachment is normally to the ground. WARNING This trimmer / brushcutter is more difficult to 10 FS 91, FS 91 R Use the wrench supplied or one of 15 meters cannot exclude the potential danger. Use good work area: To...Even maintaining a minimum distance of sufficient length to property, also maintain this distance from the operator. English where possible. Never use your STIHL dealer. When the inhalation of damage to obtain the proper torque. To reduce the risk of dust cannot be used at or near...
Instruction Manual
Page 14
... never attempt to use a metal blade on the engine and reduces its proper length. STIHL PolyCut mowing head Uses either nylon lines or nonrigid, pivoting polymer blades. Observe wear indicators. 12 FS 91, FS 91 R WARNING To reduce the risk of severe or fatal injury from blade contact and /... materials while it is still hot. To reduce the risk of damaging tree bark etc. STIHL TrimCut mowing head Frayed line is replaced by a simple adjustment (see the chapter on trimmers / brushcutters equipped with less risk of fire and burn injuries when using a catalytic converter,...
... never attempt to use a metal blade on the engine and reduces its proper length. STIHL PolyCut mowing head Uses either nylon lines or nonrigid, pivoting polymer blades. Observe wear indicators. 12 FS 91, FS 91 R WARNING To reduce the risk of severe or fatal injury from blade contact and /... materials while it is still hot. To reduce the risk of damaging tree bark etc. STIHL TrimCut mowing head Frayed line is replaced by a simple adjustment (see the chapter on trimmers / brushcutters equipped with less risk of fire and burn injuries when using a catalytic converter,...
Instruction Manual
Page 16
...be removed and 14 FS 91, FS 91 R Use the power tool like a scythe to cut wild growth and scrub, lower the rotating brush knife down small trees, STIHL recommends that the blade will crack and / or break, avoid all times. Sharpen blades in an arc. When a trimmer / brushcutter with stones,... in.) in diameter, use the left side of kickout (blade thrust) with a larger diameter, since the blade may catch or jerk the trimmer / brushcutter forward. This may seriously or fatally injure the operator or bystanders. sweep it has dulled noticeably). To reduce the risk of the power...
...be removed and 14 FS 91, FS 91 R Use the power tool like a scythe to cut wild growth and scrub, lower the rotating brush knife down small trees, STIHL recommends that the blade will crack and / or break, avoid all times. Sharpen blades in an arc. When a trimmer / brushcutter with stones,... in.) in diameter, use the left side of kickout (blade thrust) with a larger diameter, since the blade may catch or jerk the trimmer / brushcutter forward. This may seriously or fatally injure the operator or bystanders. sweep it has dulled noticeably). To reduce the risk of the power...
Instruction Manual
Page 17
..., be sure to remount the standard deflector when no longer using the lighter shaded areas of the stop helps to keep the trimmer / brushcutter against the tree during the cutting operation and will reduce the risk of loss of control and possible kickout (described ...the darker shaded area. Have such work or cleaning the power tool. STIHL recommends that the cutting attachment is highest when cutting in good condition. Always press the spark plug boot snugly onto FS 91, FS 91 R 15 Inexperienced users should only be performed by experienced operators with uniform...
..., be sure to remount the standard deflector when no longer using the lighter shaded areas of the stop helps to keep the trimmer / brushcutter against the tree during the cutting operation and will reduce the risk of loss of control and possible kickout (described ...the darker shaded area. Have such work or cleaning the power tool. STIHL recommends that the cutting attachment is highest when cutting in good condition. Always press the spark plug boot snugly onto FS 91, FS 91 R 15 Inexperienced users should only be performed by experienced operators with uniform...
Instruction Manual
Page 21
...trimmer Pole pruners Bristle brush PowerSweep 1) not approved for bike-handled machines 2) shoulder strap not necessary Mounting the Bike Handle Mounting Bike Handle with Swiveling Handle Support The machine is no more than 15 cm (6 in the lower clamp. hold both clamp moldings together. Approved Power Tool Attachments The following STIHL... (6) remains on the shaft. the springs (4 and 5) remain in ). They are loose once the wing screw has been released. FS 91, FS 91 R 19 Securing the handlebar A 7 250BA046 KN 1 N Place the handlebar (7) in the lower clamp (1) so that distance A ...
...trimmer Pole pruners Bristle brush PowerSweep 1) not approved for bike-handled machines 2) shoulder strap not necessary Mounting the Bike Handle Mounting Bike Handle with Swiveling Handle Support The machine is no more than 15 cm (6 in the lower clamp. hold both clamp moldings together. Approved Power Tool Attachments The following STIHL... (6) remains on the shaft. the springs (4 and 5) remain in ). They are loose once the wing screw has been released. FS 91, FS 91 R 19 Securing the handlebar A 7 250BA046 KN 1 N Place the handlebar (7) in the lower clamp (1) so that distance A ...
Instruction Manual
Page 47
FS 91, FS 91 R English 45 Spark arresting screen is designed to the harness. 16 Choke Knob Eases engine starting the engine. 4 Manual Fuel Pump Provides additional fuel feed .... 13 Wing Screw Locks handlebar in selected position. 14 Throttle Cable Retainer Secures the throttle cable to the drive tube. 15 Carrying Ring Connects the trimmer/brushcutter to reduce the risk of fire. 7 Machine Support For resting machine on the ground. 8 Throttle Trigger Controls the speed of the engine. 9. Stop Switch...
FS 91, FS 91 R English 45 Spark arresting screen is designed to the harness. 16 Choke Knob Eases engine starting the engine. 4 Manual Fuel Pump Provides additional fuel feed .... 13 Wing Screw Locks handlebar in selected position. 14 Throttle Cable Retainer Secures the throttle cable to the drive tube. 15 Carrying Ring Connects the trimmer/brushcutter to reduce the risk of fire. 7 Machine Support For resting machine on the ground. 8 Throttle Trigger Controls the speed of the engine. 9. Stop Switch...