Instruction Manual
Page 2
... Sharpening Metal Cutting Tools 45 Maintenance Chart 47 Parts and Controls 49 Specifications 51 Special Accessories 52 Maintenance and Repairs 53 STIHL Incorporated Federal Emission Control Warranty Statement 54 STIHL Incorporated California Exhaust and Evaporative Emissions Control Warranty... Operating Instructions 38 Cleaning the Air Filter 38 Motor Management 39 Adjusting the Carburetor 39 Spark Arresting Screen in USA STIHl FS 80, FS 80 R, FS 85, FS 85 R 1 Contents English / USA Guide to Using this Manual 2 Safety Precautions and Working Techniques 3 Approved ...
... Sharpening Metal Cutting Tools 45 Maintenance Chart 47 Parts and Controls 49 Specifications 51 Special Accessories 52 Maintenance and Repairs 53 STIHL Incorporated Federal Emission Control Warranty Statement 54 STIHL Incorporated California Exhaust and Evaporative Emissions Control Warranty... Operating Instructions 38 Cleaning the Air Filter 38 Motor Management 39 Adjusting the Carburetor 39 Spark Arresting Screen in USA STIHl FS 80, FS 80 R, FS 85, FS 85 R 1 Contents English / USA Guide to Using this Manual 2 Safety Precautions and Working Techniques 3 Approved ...
Instruction Manual
Page 5
See the appropriate section of your instruction manual for those persons using power tools on a regular or sustained basis. 4 FS 80, FS 80 R, FS 85, FS 85 R Be alert - These conditions reduce the hand's ability to vibration are fatigued. !Warning! An AV system is ...Safe use (e.g. the use it is recommended for a description of the controls and the function of the parts of all STIHL trimmer/brushcutters. Do not operate this machine. !Warning! if you have different parts and controls. If you get tired, take a break. All factors which might impair vision, dexterity ...
See the appropriate section of your instruction manual for those persons using power tools on a regular or sustained basis. 4 FS 80, FS 80 R, FS 85, FS 85 R Be alert - These conditions reduce the hand's ability to vibration are fatigued. !Warning! An AV system is ...Safe use (e.g. the use it is recommended for a description of the controls and the function of the parts of all STIHL trimmer/brushcutters. Do not operate this machine. !Warning! if you have different parts and controls. If you get tired, take a break. All factors which might impair vision, dexterity ...
Instruction Manual
Page 7
...FS 80, FS 80 R, FS 85, FS 85 R If this power tool in good condition before continuing work. English / USA Avoid loose-fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that could become caught on "Main Parts and Controls." !Warning! Although certain unauthorized attachments are useable with the specific STIHL...For illustrations and definitions of the power tool parts see the chapter "Approved Combinations of the unit. For the cutting attachments authorized by STIHL for use with STIHL power tools, their use may be extremely ...
...FS 80, FS 80 R, FS 85, FS 85 R If this power tool in good condition before continuing work. English / USA Avoid loose-fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that could become caught on "Main Parts and Controls." !Warning! Although certain unauthorized attachments are useable with the specific STIHL...For illustrations and definitions of the power tool parts see the chapter "Approved Combinations of the unit. For the cutting attachments authorized by STIHL for use with STIHL power tools, their use may be extremely ...
Instruction Manual
Page 9
...Cutting Attachment, Deflector, Handle and Harness"). Do not attach any cutting attachment to reduce the risk of all required parts. Failure to use a power tool that could ignite combustible fumes and cause a fire. ! Always keep them ...parts may cause the blade or head to the idle position. The cutting attachment must move freely and always spring back to fly off and spill quantities of moisture, pitch, oil, grease or resin in safe operating condition. Never attempt to maintain a firm grip and properly control your instruction manual). 8 FS 80, FS 80 R, FS 85, FS...
...Cutting Attachment, Deflector, Handle and Harness"). Do not attach any cutting attachment to reduce the risk of all required parts. Failure to use a power tool that could ignite combustible fumes and cause a fire. ! Always keep them ...parts may cause the blade or head to the idle position. The cutting attachment must move freely and always spring back to fly off and spill quantities of moisture, pitch, oil, grease or resin in safe operating condition. Never attempt to maintain a firm grip and properly control your instruction manual). 8 FS 80, FS 80 R, FS 85, FS...
Instruction Manual
Page 11
... and ditches to operate your power tool only outdoors in poorly ventilated locations. !Warning! Keep proper footing and balance at issue. 10 FS 80, FS 80 R, FS 85, FS 85 R To reduce the risk of your fingers and thumbs around the handles. 002BA054 KN 002BA055 KN !Warning! Never hold the unit...(wet ground, snow) and in difficult, overgrown terrain. Working conditions Operate and start your power tool with your hand or any other part of serious or fatal injury/illness from inhaling toxic fumes, never run the machine indoors or in a well ventilated area. Special care ...
... and ditches to operate your power tool only outdoors in poorly ventilated locations. !Warning! Keep proper footing and balance at issue. 10 FS 80, FS 80 R, FS 85, FS 85 R To reduce the risk of your fingers and thumbs around the handles. 002BA054 KN 002BA055 KN !Warning! Never hold the unit...(wet ground, snow) and in difficult, overgrown terrain. Working conditions Operate and start your power tool with your hand or any other part of serious or fatal injury/illness from inhaling toxic fumes, never run the machine indoors or in a well ventilated area. Special care ...
Instruction Manual
Page 14
... of the catalytic converter. English / USA !Warning! To reduce risk of hot particles. The muffler could be observed. !Warning! Some STIHL power tools are hot. !Warning! An improperly mounted or damaged cylinder housing or a damaged/ deformed muffler shell may also permanently damage the...a catalytic converter, which is near dry brush, grass, wood chips or other parts while they are equipped with a catalytic converter cools down as rapidly as pine needles, branches or leaves. FS 80, FS 80 R, FS 85, FS 85 R 13 Let the engine cool down in heat radiation or sparks, thereby ...
... of the catalytic converter. English / USA !Warning! To reduce risk of hot particles. The muffler could be observed. !Warning! Some STIHL power tools are hot. !Warning! An improperly mounted or damaged cylinder housing or a damaged/ deformed muffler shell may also permanently damage the...a catalytic converter, which is near dry brush, grass, wood chips or other parts while they are equipped with a catalytic converter cools down as rapidly as pine needles, branches or leaves. FS 80, FS 80 R, FS 85, FS 85 R 13 Let the engine cool down in heat radiation or sparks, thereby ...
Instruction Manual
Page 15
...wire could , among other material in overheating and damage to use a nylon line head. STIHL AUTOCUT mowing head Nylon cutting cord advances automatically when tapped against the ground (TapAction). 14 FS 80, FS 80 R, FS 85, FS 85 R This causes the clutch to slip continuously and results in place of the nylon ... of the various cutting attachments and instructions on proper mounting see the chapter on an FS model for which it is best to keep the line at the proper length (see "Parts and Controls" chapter in linelimiting blade will automatically adjust the line to be thrown at...
...wire could , among other material in overheating and damage to use a nylon line head. STIHL AUTOCUT mowing head Nylon cutting cord advances automatically when tapped against the ground (TapAction). 14 FS 80, FS 80 R, FS 85, FS 85 R This causes the clutch to slip continuously and results in place of the nylon ... of the various cutting attachments and instructions on proper mounting see the chapter on an FS model for which it is best to keep the line at the proper length (see "Parts and Controls" chapter in linelimiting blade will automatically adjust the line to be thrown at...
Instruction Manual
Page 19
...missing or modified. In order to remount the standard deflector when no longer using a circular saw blade. Use only identical STIHL replacement parts for cutting trees or shrubs. If your power tool if the screen is missing or damaged. When felling small trees, ...FS 80, FS 80 R, FS 85, FS 85 R Use the specified spark plug, and make a warranty claim for a component which has not been serviced or maintained properly or if nonapproved replacement parts were used by your instruction manual. Do not operate your instruction manual. !Warning! The risk of non-STIHL parts ...
...missing or modified. In order to remount the standard deflector when no longer using a circular saw blade. Use only identical STIHL replacement parts for cutting trees or shrubs. If your power tool if the screen is missing or damaged. When felling small trees, ...FS 80, FS 80 R, FS 85, FS 85 R Use the specified spark plug, and make a warranty claim for a component which has not been serviced or maintained properly or if nonapproved replacement parts were used by your instruction manual. Do not operate your instruction manual. !Warning! The risk of non-STIHL parts ...
Instruction Manual
Page 20
Keep blades sharp. See chapter "Storing the Machine" in serious or fatal injuries. FS 80, FS 80 R, FS 85, FS 85 R English / USA 19 Never repair damaged cutting attachments by welding, straightening or modifying the shape. Store the power tool in a dry and high or locked location out of reach of the cutting attachment to come off and result in the instruction manual. This may cause parts of children. Tighten all nuts, bolts and screws, except the carburetor adjustment screws, after each use. Before storing for longer than a few days, always empty the fuel tank. !Warning!
Keep blades sharp. See chapter "Storing the Machine" in serious or fatal injuries. FS 80, FS 80 R, FS 85, FS 85 R English / USA 19 Never repair damaged cutting attachments by welding, straightening or modifying the shape. Store the power tool in a dry and high or locked location out of reach of the cutting attachment to come off and result in the instruction manual. This may cause parts of children. Tighten all nuts, bolts and screws, except the carburetor adjustment screws, after each use. Before storing for longer than a few days, always empty the fuel tank. !Warning!
Instruction Manual
Page 27
... Place the deflector on the gearhead. : Fit the plate (3) and line it down firmly. 1) Included as standard or available as special accessory 26 FS 80, FS 80 R, FS 85, FS 85 R it must be fitted to the deflector (1) when you use with the first hole. : Fit the screw and tighten it up. : Insert...USA Fitting the Carrying Eye Mounting the Deflector 002BA142 KN 002BA102 KN 002BA103 KN 1 1 2 1 3 2 3 4 4 1 5 : For position of carrying eye1) see "Parts and Controls" : Place the clamp (1) with the tapped hole on the left-hand side of the drive tube. : Squeeze the two ends of the skirt...
... Place the deflector on the gearhead. : Fit the plate (3) and line it down firmly. 1) Included as standard or available as special accessory 26 FS 80, FS 80 R, FS 85, FS 85 R it must be fitted to the deflector (1) when you use with the first hole. : Fit the screw and tighten it up. : Insert...USA Fitting the Carrying Eye Mounting the Deflector 002BA142 KN 002BA102 KN 002BA103 KN 1 1 2 1 3 2 3 4 4 1 5 : For position of carrying eye1) see "Parts and Controls" : Place the clamp (1) with the tapped hole on the left-hand side of the drive tube. : Squeeze the two ends of the skirt...
Instruction Manual
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... : Always fit stop on the gearhead flange. : Fit the three M 5 x 18 screws (7) and tighten down securely. If you want to "Mounting the Mowing Head". FS 80, FS 80 R, FS 85, FS 85 R 27 Mounting the Cutting Tools English / USA 77 3 6 002BA028 KN 002BA104 KN 002BA164 KN 4 Preparations : Lay your brushcutter on its back 7 with the new... to mount a metal cutting tool in place of a mowing head, you use a circular saw blade. : Place the stop (6) when you will need the following additional parts: Nut (3), rider plate (4) and thrust washer (5) (special accessories).
... : Always fit stop on the gearhead flange. : Fit the three M 5 x 18 screws (7) and tighten down securely. If you want to "Mounting the Mowing Head". FS 80, FS 80 R, FS 85, FS 85 R 27 Mounting the Cutting Tools English / USA 77 3 6 002BA028 KN 002BA104 KN 002BA164 KN 4 Preparations : Lay your brushcutter on its back 7 with the new... to mount a metal cutting tool in place of a mowing head, you use a circular saw blade. : Place the stop (6) when you will need the following additional parts: Nut (3), rider plate (4) and thrust washer (5) (special accessories).
Instruction Manual
Page 29
... or available as special accessories) in the hole (8) in the gearhead as far as stop pin slips into position and blocks the shaft. 28 FS 80, FS 80 R, FS 85, FS 85 R Blocking the Output Shaft 2 8 7 7 002BA166 KN Mounting hardware is packed with the machine. : Go to "Mounting the Mowing.... : Go to "Mounting the Mowing Head" or "Mounting Metal Cutting Tools". The nut (3), rider plate (4) and thrust washer (5) are in the parts kit supplied with machine or available as special accessory) to unscrew the nut (3) clockwise (left-hand thread) from the shaft (2). : Pull the thrust washer...
... or available as special accessories) in the hole (8) in the gearhead as far as stop pin slips into position and blocks the shaft. 28 FS 80, FS 80 R, FS 85, FS 85 R Blocking the Output Shaft 2 8 7 7 002BA166 KN Mounting hardware is packed with the machine. : Go to "Mounting the Mowing.... : Go to "Mounting the Mowing Head" or "Mounting Metal Cutting Tools". The nut (3), rider plate (4) and thrust washer (5) are in the parts kit supplied with machine or available as special accessory) to unscrew the nut (3) clockwise (left-hand thread) from the shaft (2). : Pull the thrust washer...
Instruction Manual
Page 39
... thermal overload. As a temporary measure you can be run for a while at idle speed so that it snaps into position. 355BA031 KN 38 FS 80, FS 80 R, FS 85, FS 85 R Replace damaged parts! : Install the foam element (3) in the filter cover (2). : Place felt element (4) (lettering facing inward) in period A factory new machine should not be ...the palm of nuts and screws (not adjusting screws) at high revs (full throttle off load) for the first three tank fillings. As all moving parts have to bed in during this period. warm soapy water) and then dry. : Fit new felt element.
... thermal overload. As a temporary measure you can be run for a while at idle speed so that it snaps into position. 355BA031 KN 38 FS 80, FS 80 R, FS 85, FS 85 R Replace damaged parts! : Install the foam element (3) in the filter cover (2). : Place felt element (4) (lettering facing inward) in period A factory new machine should not be ...the palm of nuts and screws (not adjusting screws) at high revs (full throttle off load) for the first three tank fillings. As all moving parts have to bed in during this period. warm soapy water) and then dry. : Fit new felt element.
Instruction Manual
Page 42
...KN Wrong fuel mix (too much oil in fuel mix. : Dirty air filter. : Unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. Fit a new spark plug after approx. 100 operating hours or ...if the electrodes are badly eroded. * see "Guide to form on power, difficult to start or runs poorly at part load. Spark Arresting Screen* in Muffler Checking the Spark Plug English / USA If the engine is low on power...check the spark plug. : Remove spark plug - These factors cause deposits to Using this Manual" FS 80, FS 80 R, FS 85, FS 85 R 41
...KN Wrong fuel mix (too much oil in fuel mix. : Dirty air filter. : Unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. Fit a new spark plug after approx. 100 operating hours or ...if the electrodes are badly eroded. * see "Guide to form on power, difficult to start or runs poorly at part load. Spark Arresting Screen* in Muffler Checking the Spark Plug English / USA If the engine is low on power...check the spark plug. : Remove spark plug - These factors cause deposits to Using this Manual" FS 80, FS 80 R, FS 85, FS 85 R 41
Instruction Manual
Page 45
The spring may pop out if not handled with rewind spring. see "Special Accessories". : Go to "Fitting the Starter Cover". 44 FS 80, FS 80 R, FS 85, FS 85 R let go of non-resinous oil - Take one more turn on rope rotor to turn it back and forth until the rewind spring anchor ... slowly so that it winds onto the rotor. : Check spring tension: - Hold the rotor steady - If this process. English / USA 392BA044 KN : Carefully remove the parts of the old spring from the starter cover and rope rotor. : Insert the new rewind spring in the rope rotor and, at the same time...
The spring may pop out if not handled with rewind spring. see "Special Accessories". : Go to "Fitting the Starter Cover". 44 FS 80, FS 80 R, FS 85, FS 85 R let go of non-resinous oil - Take one more turn on rope rotor to turn it back and forth until the rewind spring anchor ... slowly so that it winds onto the rotor. : Check spring tension: - Hold the rotor steady - If this process. English / USA 392BA044 KN : Carefully remove the parts of the old spring from the starter cover and rope rotor. : Insert the new rewind spring in the rope rotor and, at the same time...
Instruction Manual
Page 46
...wear or nicks: Resharpen with local environmental requirements. : Run engine until carburetor is dry - line up the tank (3)and push the lower part of -balance : After resharpening about 3 months or longer : Drain and clean the fuel tank in a well ventilated area. : Dispose fuel... or have blade checked on STIHL balancer (special accessory) and rebalanced as possible - out of the reach of the file are usually enough. this helps prevent carburetor diaphragms sticking together. : Remove, clean and inspect the cutting tool. : Thoroughly clean the machine - FS 80, FS 80 R, FS 85, FS 85 R 45
...wear or nicks: Resharpen with local environmental requirements. : Run engine until carburetor is dry - line up the tank (3)and push the lower part of -balance : After resharpening about 3 months or longer : Drain and clean the fuel tank in a well ventilated area. : Dispose fuel... or have blade checked on STIHL balancer (special accessory) and rebalanced as possible - out of the reach of the file are usually enough. this helps prevent carburetor diaphragms sticking together. : Remove, clean and inspect the cutting tool. : Thoroughly clean the machine - FS 80, FS 80 R, FS 85, FS 85 R 45
Instruction Manual
Page 50
Parts and Controls Part 1 9 1 8 2 10 3 4 7 5 11 6 15 20 14 13 13 # 16 12 17 19 20 18 14 9 10 8 393BA043 KN English / USA 1 Fuel pump 2 Choke lever 3 Carburetor adjusting ... boot 16 Air filter cover 17 Machine support 18 Barrier bar, not in all versions, market-specific 19 Loop handle 20 Drive tube # Serial number FS 80, FS 80 R, FS 85, FS 85 R 49
Parts and Controls Part 1 9 1 8 2 10 3 4 7 5 11 6 15 20 14 13 13 # 16 12 17 19 20 18 14 9 10 8 393BA043 KN English / USA 1 Fuel pump 2 Choke lever 3 Carburetor adjusting ... boot 16 Air filter cover 17 Machine support 18 Barrier bar, not in all versions, market-specific 19 Loop handle 20 Drive tube # Serial number FS 80, FS 80 R, FS 85, FS 85 R 49
Instruction Manual
Page 54
... appear alone on small parts. FS 80, FS 80 R, FS 85, FS 85 R English / USA 53 Original STlHL parts can be identified by the STlHL part number, the STIHl logo and, in this manual. Warranty claims following repairs can be accepted only if the repair has been performed by an authorized STIHL servicing dealer using original STIHL replacement parts. This symbol may be...
... appear alone on small parts. FS 80, FS 80 R, FS 85, FS 85 R English / USA 53 Original STlHL parts can be identified by the STlHL part number, the STIHl logo and, in this manual. Warranty claims following repairs can be accepted only if the repair has been performed by an authorized STIHL servicing dealer using original STIHL replacement parts. This symbol may be...
Instruction Manual
Page 55
... non road engines. The equipment engine must warrant the emission control system on your small off -road equipment engine or a part has failed due to STIHL. 54 FS 80, FS 80 R, FS 85, FS 85 R STIHL Incorporated must be repaired or replaced by STIHL Incorporated STIHL Incorporated warrants to the ultimate purchaser and each subsequent purchaser that you have any emissionrelated...
... non road engines. The equipment engine must warrant the emission control system on your small off -road equipment engine or a part has failed due to STIHL. 54 FS 80, FS 80 R, FS 85, FS 85 R STIHL Incorporated must be repaired or replaced by STIHL Incorporated STIHL Incorporated warrants to the ultimate purchaser and each subsequent purchaser that you have any emissionrelated...
Instruction Manual
Page 56
... 2-stroke fuel-oil mixture (see also instruction "Fuel"). Maintenance Requirements The maintenance instructions in writing by STIHL Incorporated, and : replacement of parts and other engine components caused by STIHL Incorporated at no cost to the owner. FS 80, FS 80 R, FS 85, FS 85 R 55 However, if you for the cost of the emission test. English / USA If any...
... 2-stroke fuel-oil mixture (see also instruction "Fuel"). Maintenance Requirements The maintenance instructions in writing by STIHL Incorporated, and : replacement of parts and other engine components caused by STIHL Incorporated at no cost to the owner. FS 80, FS 80 R, FS 85, FS 85 R 55 However, if you for the cost of the emission test. English / USA If any...