Product Instruction Manual
Page 3
...oils, paper can go to Using this Manual Safety Precautions and Working Techniques Using the Unit Mounting the Loop Handle 2 STIHL Incorporated California Exhaust and Evaporative 3 Emissions Control Warranty 12 Statement 14 Trademarks Adjusting the Throttle Cable 14 Mounting the Cutting ...28 Maintenance and Care 29 Main Parts 31 Specifications 32 Special Accessories 33 Maintenance and Repairs 34 STIHL Incorporated Federal Emission Control Warranty Statement 34 { FC 90 English Allow only persons who fully understand this manual. Careless or improper use may cause serious ...
...oils, paper can go to Using this Manual Safety Precautions and Working Techniques Using the Unit Mounting the Loop Handle 2 STIHL Incorporated California Exhaust and Evaporative 3 Emissions Control Warranty 12 Statement 14 Trademarks Adjusting the Throttle Cable 14 Mounting the Cutting ...28 Maintenance and Care 29 Main Parts 31 Specifications 32 Special Accessories 33 Maintenance and Repairs 34 STIHL Incorporated Federal Emission Control Warranty Statement 34 { FC 90 English Allow only persons who fully understand this manual. Careless or improper use may cause serious ...
Product Instruction Manual
Page 4
... the screw (1). As a result, engineering changes and improvements are marked with the symbols and signal words described below: Engineering Improvements STIHL's philosophy is to continually improve all of its individual components. 2 FC 90 Indicates a hazardous situation which, if not avoided, could result in different ways: N A bullet marks a step or procedure. English Guide to...
... the screw (1). As a result, engineering changes and improvements are marked with the symbols and signal words described below: Engineering Improvements STIHL's philosophy is to continually improve all of its individual components. 2 FC 90 Indicates a hazardous situation which, if not avoided, could result in different ways: N A bullet marks a step or procedure. English Guide to...
Product Instruction Manual
Page 5
... Have your FC model. Observe all STIHL edgers. Striking such objects could damage the cutting attachment and may cause serious or fatal injury. Use your doctor before operating this machine may have any condition that are fatigued. Warning! the use of an edger involves 1. FC 90 3 As more... physical condition and mental health and not under the influence of any substance (drugs, alcohol, etc.) which might be aggravated by STIHL for use of all applicable local safety regulations, standards and ordinances. Different models may be allowed to operate your power tool without ...
... Have your FC model. Observe all STIHL edgers. Striking such objects could damage the cutting attachment and may cause serious or fatal injury. Use your doctor before operating this machine may have any condition that are fatigued. Warning! the use of an edger involves 1. FC 90 3 As more... physical condition and mental health and not under the influence of any substance (drugs, alcohol, etc.) which might be aggravated by STIHL for use of all applicable local safety regulations, standards and ordinances. Different models may be allowed to operate your power tool without ...
Product Instruction Manual
Page 6
...'s ability to protect your hands. 4 FC 90 All factors which contribute to whitefinger disease are not known, but do not guarantee that you also wear a face shield or face screen over your applicable national standard). In order to reduce the risk of injury to your face STIHL recommends that affect blood vessels and...
...'s ability to protect your hands. 4 FC 90 All factors which contribute to whitefinger disease are not known, but do not guarantee that you also wear a face shield or face screen over your applicable national standard). In order to reduce the risk of injury to your face STIHL recommends that affect blood vessels and...
Product Instruction Manual
Page 7
...or property damage. Good footing is in particular that the controls and safety devices are useable with nonslip soles. Only attachments supplied by STIHL and expressly approved by a spark or other personal injury from your power tool in fact, be carried only in a vehicle, properly...control and blade contact, never carry or transport your power tool with the specific STIHL model are recommended. If spilled and ignited by STIHL for which it is tight (no leaks) and that FC 90 the fuel system is damaged. Fueling Instructions Warning! Gasoline vapor pressure may be ...
...or property damage. Good footing is in particular that the controls and safety devices are useable with nonslip soles. Only attachments supplied by STIHL and expressly approved by a spark or other personal injury from your power tool in fact, be carried only in a vehicle, properly...control and blade contact, never carry or transport your power tool with the specific STIHL model are recommended. If spilled and ignited by STIHL for which it is tight (no leaks) and that FC 90 the fuel system is damaged. Fueling Instructions Warning! Gasoline vapor pressure may be ...
Product Instruction Manual
Page 8
... the cap down firmly while turning it clockwise as far as it normally. Grip the cap and check for installation, turn ). Warning! If this STIHL cap, raise the grip on the grip does not fit in the corresponding recess in the filler opening, or if the cap is loose in...10 feet (3 m) from handling, cleaning or an improper attempt at tightening. 001BA227 KN Left: Right: Base of cap correctly positioned for repair. 001BA226 KN 6 FC 90 Misaligned, damaged or broken cap N If the cap does not drop fully into the correct position. this with grip Warning! Then, twist the cap clockwise...
... the cap down firmly while turning it clockwise as far as it normally. Grip the cap and check for installation, turn ). Warning! If this STIHL cap, raise the grip on the grip does not fit in the corresponding recess in the filler opening, or if the cap is loose in...10 feet (3 m) from handling, cleaning or an improper attempt at tightening. 001BA227 KN Left: Right: Base of cap correctly positioned for repair. 001BA226 KN 6 FC 90 Misaligned, damaged or broken cap N If the cap does not drop fully into the correct position. this with grip Warning! Then, twist the cap clockwise...
Product Instruction Manual
Page 10
... hand. Never touch a moving cutting attachment with both hands on the handles while you cannot set the correct idle speed, have your STIHL dealer check your body. 002BA054 KN 8 FC 90 English Warning! Your power tool is clear of your power tool and make proper adjustments and repairs. Warning! Warning! Do not let...
... hand. Never touch a moving cutting attachment with both hands on the handles while you cannot set the correct idle speed, have your STIHL dealer check your body. 002BA054 KN 8 FC 90 English Warning! Your power tool is clear of your power tool and make proper adjustments and repairs. Warning! Warning! Do not let...
Product Instruction Manual
Page 12
... and injury, always shut off the engine and make sure the cutting attachment has stopped before replacing the cutting attachment. Never modify your STIHL servicing dealer only. English Warning! Before you start work immediately. If the behavior of sufficient length to the blade. Replace a cracked...heat radiation or sparks, thereby increasing the risk of the cutting attachment and instructions on proper mounting see your instruction manual. 10 FC 90 To reduce the risk of the engine (e.g. The muffler and other such objects that the cutting attachment is hot. To reduce...
... and injury, always shut off the engine and make sure the cutting attachment has stopped before replacing the cutting attachment. Never modify your STIHL servicing dealer only. English Warning! Before you start work immediately. If the behavior of sufficient length to the blade. Replace a cracked...heat radiation or sparks, thereby increasing the risk of the cutting attachment and instructions on proper mounting see your instruction manual. 10 FC 90 To reduce the risk of the engine (e.g. The muffler and other such objects that the cutting attachment is hot. To reduce...
Product Instruction Manual
Page 13
...the ignition wire connector in hot or dry weather. The solid jet of water may deny coverage. FC 90 11 Always press the spark plug boot snugly onto the spark plug terminal of non-STIHL parts may cause a fire. Do not operate your machine with a removed spark plug, since uncontained.... English Warning! Tighten all nuts, bolts and screws, except the carburetor adjustment screws, after each use a metal blade on blades. Use only identical STIHL replacement parts for longer than a few days, always empty the fuel tank. See chapter "Storing the Machine" in a dry and high or locked...
...the ignition wire connector in hot or dry weather. The solid jet of water may deny coverage. FC 90 11 Always press the spark plug boot snugly onto the spark plug terminal of non-STIHL parts may cause a fire. Do not operate your machine with a removed spark plug, since uncontained.... English Warning! Tighten all nuts, bolts and screws, except the carburetor adjustment screws, after each use a metal blade on blades. Use only identical STIHL replacement parts for longer than a few days, always empty the fuel tank. See chapter "Storing the Machine" in a dry and high or locked...
Product Instruction Manual
Page 17
.... Collar (see "Special Accessories" - N Screw the mounting nut (6) on its tension, fit a new nut. FC 90 15 If the cup spring (10) on the shaft (9) and block the shaft. N Remove the thrust washer. 4-MIX Engine English The STIHL 4-MIX engine features mixture lubrication and must engage the blade's mounting hole. into position and...
.... Collar (see "Special Accessories" - N Screw the mounting nut (6) on its tension, fit a new nut. FC 90 15 If the cup spring (10) on the shaft (9) and block the shaft. N Remove the thrust washer. 4-MIX Engine English The STIHL 4-MIX engine features mixture lubrication and must engage the blade's mounting hole. into position and...
Product Instruction Manual
Page 18
...increases the risk of empty mixing-oil canisters only at authorized disposal locations. 16 FC 90 When mixing, pour oil into the mixture. If the octane rating of up to 25% (E25). For this reason STIHL recommends that are designed for use only high-quality unleaded gasoline! We recommend...a few days work, not to exceed 3 months of 89 (R+M/2). Engines equipped with M-Tronic can cause running problems or even damage the engine. Gasoline Oil (STIHL 50:1 or equivalent high-quality oils) US gal. 1 2 1/2 5 US fl.oz 2.6 6.4 12.8 Dispose of piston seizure and damage to the engine....
...increases the risk of empty mixing-oil canisters only at authorized disposal locations. 16 FC 90 When mixing, pour oil into the mixture. If the octane rating of up to 25% (E25). For this reason STIHL recommends that are designed for use only high-quality unleaded gasoline! We recommend...a few days work, not to exceed 3 months of 89 (R+M/2). Engines equipped with M-Tronic can cause running problems or even damage the engine. Gasoline Oil (STIHL 50:1 or equivalent high-quality oils) US gal. 1 2 1/2 5 US fl.oz 2.6 6.4 12.8 Dispose of piston seizure and damage to the engine....
Product Instruction Manual
Page 19
...KN Toolless filler cap (with the surface. N Fold the grip down so that the filler cap is not properly closed and the steps FC 90 17 One of the STIHL filling system (special accessory). N Remove the filler cap. If the grip is not flush with the grip in the recess (arrow),... the cap is facing upwards. N Turn cap clockwise as far as standard at the factory. STIHL recommends use of two different filler caps is flush with folding grip) N Turn the cap counterclockwise (approx. 1/4 turn). N Swing the grip into the ...
...KN Toolless filler cap (with the surface. N Fold the grip down so that the filler cap is not properly closed and the steps FC 90 17 One of the STIHL filling system (special accessory). N Remove the filler cap. If the grip is not flush with the grip in the recess (arrow),... the cap is facing upwards. N Turn cap clockwise as far as standard at the factory. STIHL recommends use of two different filler caps is flush with folding grip) N Turn the cap counterclockwise (approx. 1/4 turn). N Swing the grip into the ...
Product Instruction Manual
Page 20
... off - N Turn the cap clockwise as far as possible by hand. the engine is switched on - N Remove the filler cap. the engine can start 18 FC 90 STIHL recommends use of slide control 4 STOP-0 - engine off 5 F - the ignition is running or can start 6 START - Refueling Take care not to spill fuel while fueling...
... off - N Turn the cap clockwise as far as possible by hand. the engine is switched on - N Remove the filler cap. the engine can start 18 FC 90 STIHL recommends use of slide control 4 STOP-0 - engine off 5 F - the ignition is running or can start 6 START - Refueling Take care not to spill fuel while fueling...
Product Instruction Manual
Page 26
... fire and burn injury, use only spark plugs authorized by STIHL. Unfavorable running conditions, e.g. To reduce the risk of the approved range. Installing the spark plug N Screw home the spark plug, fit the boot and press it down firmly. 24 FC 90 N Refit the filler plug and tighten it must be seen... on the inside of the filler plug, screw the tube (2) of STIHL gear lubricant for brushcutters - Too much oil in the boot may create arcing that could...
... fire and burn injury, use only spark plugs authorized by STIHL. Unfavorable running conditions, e.g. To reduce the risk of the approved range. Installing the spark plug N Screw home the spark plug, fit the boot and press it down firmly. 24 FC 90 N Refit the filler plug and tighten it must be seen... on the inside of the filler plug, screw the tube (2) of STIHL gear lubricant for brushcutters - Too much oil in the boot may create arcing that could...
Product Instruction Manual
Page 29
... a well ventilated area. English Replacing the Depth Wheel Have a worn depth wheel replaced by a servicing dealer. 241BA024 KN FC 90 27 STIHL recommends that the wingnut (2) does not work carried out exclusively by an authorized STIHL servicing dealer. Storing the Machine For periods of 3 months or longer N Drain and clean the fuel tank in...
... a well ventilated area. English Replacing the Depth Wheel Have a worn depth wheel replaced by a servicing dealer. 241BA024 KN FC 90 27 STIHL recommends that the wingnut (2) does not work carried out exclusively by an authorized STIHL servicing dealer. Storing the Machine For periods of 3 months or longer N Drain and clean the fuel tank in...
Product Instruction Manual
Page 30
... Replace the blade (1) if its length (A) is out-of -balance on the screw. see "Replacing the Edger Blade". 28 FC 90 STIHL recommends you use only original STIHL cutting blades - If blade is no longer sufficient to straighten or weld a bent or cracked blade - the skirt must be ... N Have your dealer check the blade for out-of -balance, fit a new one - STIHL recommends an authorized STIHL servicing dealer. N Insert the screw and tighten it may break - N Fit the washer on a STIHL balancer (special accessory) - 241BA019 KN English Replacing the Skirt Removing the skirt 1 23 4 ...
... Replace the blade (1) if its length (A) is out-of -balance on the screw. see "Replacing the Edger Blade". 28 FC 90 STIHL recommends you use only original STIHL cutting blades - If blade is no longer sufficient to straighten or weld a bent or cracked blade - the skirt must be ... N Have your dealer check the blade for out-of -balance, fit a new one - STIHL recommends an authorized STIHL servicing dealer. N Insert the screw and tighten it may break - N Fit the washer on a STIHL balancer (special accessory) - 241BA019 KN English Replacing the Skirt Removing the skirt 1 23 4 ...
Product Instruction Manual
Page 32
... operating conditions are difficult (very dusty work or daily after each refueling stop weekly monthly every 12 months if problem if damaged if required X X X X 30 FC 90 Visual inspection Blade Replace Check tightness Wear guard for gearbox Check Replace Gearbox lubrication Check Replenish Safety labels Replace...
... operating conditions are difficult (very dusty work or daily after each refueling stop weekly monthly every 12 months if problem if damaged if required X X X X 30 FC 90 Visual inspection Blade Replace Check tightness Wear guard for gearbox Check Replace Gearbox lubrication Check Replenish Safety labels Replace...
Product Instruction Manual
Page 35
...: 0.02 in . (3.8 mm) Marking 4133 / 01 4133 / 02 Other Special Accessories Contact your STIHL dealer for information regarding special accessories that may be available for your product. FC 90 33 output shaft speed (cutting blade): Valve clearance: Inlet valve: Exhaust valve: 1.73 cu. Engine ...Weight STIHL single cylinder four-stroke engine with integral fuel pump Fuel tank capacity: 17.9 ...
...: 0.02 in . (3.8 mm) Marking 4133 / 01 4133 / 02 Other Special Accessories Contact your STIHL dealer for information regarding special accessories that may be available for your product. FC 90 33 output shaft speed (cutting blade): Valve clearance: Inlet valve: Exhaust valve: 1.73 cu. Engine ...Weight STIHL single cylinder four-stroke engine with integral fuel pump Fuel tank capacity: 17.9 ...
Product Instruction Manual
Page 36
... can be accepted only if the repair has been performed by STIHL Incorporated free of charge. In the U.S. Your emission control system includes parts such as a 34 FC 90 Manufacturer's Warranty Coverage In the U.S., 1997 and later model year small off-road equipment engines ...abuse, neglect or improper maintenance of your small off -road equipment engine to meet the U.S. Environmental Protection Agency (EPA) and STIHL Incorporated are responsible for presenting your small off -road equipment engines must warrant the emission control system on your instruction manual. Also ...
... can be accepted only if the repair has been performed by STIHL Incorporated free of charge. In the U.S. Your emission control system includes parts such as a 34 FC 90 Manufacturer's Warranty Coverage In the U.S., 1997 and later model year small off-road equipment engines ...abuse, neglect or improper maintenance of your small off -road equipment engine to meet the U.S. Environmental Protection Agency (EPA) and STIHL Incorporated are responsible for presenting your small off -road equipment engines must warrant the emission control system on your instruction manual. Also ...
Product Instruction Manual
Page 37
...independent test laboratory. Any manufacturer-approved or equivalent replacement part may be performed at the time of the emission test. STIHL Incorporated is defective. Carburetor - Choke (Cold Start Enrichment System) - Intake Manifold - Fuel Cap - Fuel Line ...materials and workmanship which is defective. Deviations from defects in this recommendation regarding your engine is purchased by STIHL Incorporated at 1-800-4678445 or you claim warranty for a component and the machine is tested as the ..., or which cause the engine to fail to the owner. FC 90 35
...independent test laboratory. Any manufacturer-approved or equivalent replacement part may be performed at the time of the emission test. STIHL Incorporated is defective. Carburetor - Choke (Cold Start Enrichment System) - Intake Manifold - Fuel Cap - Fuel Line ...materials and workmanship which is defective. Deviations from defects in this recommendation regarding your engine is purchased by STIHL Incorporated at 1-800-4678445 or you claim warranty for a component and the machine is tested as the ..., or which cause the engine to fail to the owner. FC 90 35