Instruction Manual
Page 3
... California Exhaust and Evaporative Emissions Control Warranty Statement Trademarks English Allow only persons who fully understand this manual. Always wear proper eye protection. © ANDREAS STIHL AG & Co. VA8.K20. 0000001050_029_GB FS 40, FS 40 C, FS 50, FS 50 C This instruction manual is important that you read, understand and follow the safety precautions and the operating and maintenance instructions...
... California Exhaust and Evaporative Emissions Control Warranty Statement Trademarks English Allow only persons who fully understand this manual. Always wear proper eye protection. © ANDREAS STIHL AG & Co. VA8.K20. 0000001050_029_GB FS 40, FS 40 C, FS 50, FS 50 C This instruction manual is important that you read, understand and follow the safety precautions and the operating and maintenance instructions...
Instruction Manual
Page 4
... The meanings of the pictograms attached to or embossed on the machine are explained in this manual, please contact your STIHL dealer or the STIHL distributor for your area for gear lubricant Air intake summer mode Air intake winter mode Handle heating Symbols in ...oil mixture Press to operate decompression valve Manual fuel pump Press to an illustration may be on the model concerned, the following pictograms may contain item numbers that refers directly to operate manual fuel pump Filler hole for assistance. 2 FS 40, FS 40 C, FS 50, FS 50 C Such paragraphs are made from those...
... The meanings of the pictograms attached to or embossed on the machine are explained in this manual, please contact your STIHL dealer or the STIHL distributor for your area for gear lubricant Air intake summer mode Air intake winter mode Handle heating Symbols in ...oil mixture Press to operate decompression valve Manual fuel pump Press to an illustration may be on the model concerned, the following pictograms may contain item numbers that refers directly to operate manual fuel pump Filler hole for assistance. 2 FS 40, FS 40 C, FS 50, FS 50 C Such paragraphs are made from those...
Instruction Manual
Page 5
...Use your power tool without the instruction manual. during a work , check with your STIHL dealer show you . the operator 2. THE OPERATOR Physical Condition You must be observed to reduce the risk of control. FS 40, FS 40 C, FS 50, FS 50 C 3 Observe all STIHL trimmers. Most of any power tool can... with flexible plastic blades (i.e., the PolyCut head). If the rotating line or blade comes in the direction of your instruction manual for the type of injury to bystanders and damage to property, never let your power tool. Bystanders, especially children, and...
...Use your power tool without the instruction manual. during a work , check with your STIHL dealer show you . the operator 2. THE OPERATOR Physical Condition You must be observed to reduce the risk of control. FS 40, FS 40 C, FS 50, FS 50 C 3 Observe all STIHL trimmers. Most of any power tool can... with flexible plastic blades (i.e., the PolyCut head). If the rotating line or blade comes in the direction of your instruction manual for the type of injury to bystanders and damage to property, never let your power tool. Bystanders, especially children, and...
Instruction Manual
Page 7
..., blade and the cutting attachment. Check in a vehicle, properly secure it was not designed (e.g. WARNING Never modify this instruction manual). 389BA019 KN FS 40, FS 40 C, FS 50, FS 50 C 5 Good footing is subjected to unusually high loads for fuel (see the chapter on branches, brush or the moving .... sure the cutting attachment has stopped before continuing work gloves (e.g. Clothing must be carried only in a manner that it checked by STIHL for English It may , in good condition before putting a trimmer down. Wear long pants made of movement. Secure hair so it...
..., blade and the cutting attachment. Check in a vehicle, properly secure it was not designed (e.g. WARNING Never modify this instruction manual). 389BA019 KN FS 40, FS 40 C, FS 50, FS 50 C 5 Good footing is subjected to unusually high loads for fuel (see the chapter on branches, brush or the moving .... sure the cutting attachment has stopped before continuing work gloves (e.g. Clothing must be carried only in a manner that it checked by STIHL for English It may , in good condition before putting a trimmer down. Wear long pants made of movement. Secure hair so it...
Instruction Manual
Page 10
Then start position g, place the Choke Lever to 30 times - If the manual fuel pump bulb will not be filled, place the Choke Lever to clear the vapor and send liquid fuel into the carburetor. to the cold ... g and pull the starter cord until the engine runs. even if the bulb is already filled with fuel - English To relieve vapor lock: - Press the manual fuel pump bulb at least 20 to the warm start position < and start the engine in the cold start the power tool. For specific starting...
Then start position g, place the Choke Lever to 30 times - If the manual fuel pump bulb will not be filled, place the Choke Lever to clear the vapor and send liquid fuel into the carburetor. to the cold ... g and pull the starter cord until the engine runs. even if the bulb is already filled with fuel - English To relieve vapor lock: - Press the manual fuel pump bulb at least 20 to the warm start position < and start the engine in the cold start the power tool. For specific starting...
Instruction Manual
Page 11
... the correct direction of rotation of you are wearing one -person machine. WARNING Your power tool is clear of the cutting attachment. FS 40, FS 40 C, FS 50, FS 50 C 9 Arrow on the deflector (as seen from the fueling spot, outdoors only. The deflector must not be used in combination ...size before starting work area, even when starting instructions, see the appropriate section of the deflector in order to suit your instruction manual. Once the engine has started, immediately blip the throttle trigger, which should be fast enough for proper control and less fatigue in...
... the correct direction of rotation of you are wearing one -person machine. WARNING Your power tool is clear of the cutting attachment. FS 40, FS 40 C, FS 50, FS 50 C 9 Arrow on the deflector (as seen from the fueling spot, outdoors only. The deflector must not be used in combination ...size before starting work area, even when starting instructions, see the appropriate section of the deflector in order to suit your instruction manual. Once the engine has started, immediately blip the throttle trigger, which should be fast enough for proper control and less fatigue in...
Instruction Manual
Page 12
English Failure to follow this position to have your STIHL dealer check your body. If you are in this ... and grips are working on the handles while you cannot set the correct idle speed, have your instruction manual. Special care must be particularly alert to allow easier restarting. For directions on " position in serious or...normally in difficult, overgrown terrain. Keep proper footing and balance at all times. Work carefully. 10 FS 40, FS 40 C, FS 50, FS 50 C To reduce the risk of your power tool under good visibility and daylight conditions only. Working ...
English Failure to follow this position to have your STIHL dealer check your body. If you are in this ... and grips are working on the handles while you cannot set the correct idle speed, have your instruction manual. Special care must be particularly alert to allow easier restarting. For directions on " position in serious or...normally in difficult, overgrown terrain. Keep proper footing and balance at all times. Work carefully. 10 FS 40, FS 40 C, FS 50, FS 50 C To reduce the risk of your power tool under good visibility and daylight conditions only. Working ...
Instruction Manual
Page 14
...other damage. Keep the area around the head at high speed and cause serious or fatal injury. Let the engine cool down sitting on manually adjustable mowing heads. See the "Maintenance, Repair and Storing" section of a brush or forest fire is furnished with a damaged or ... even if damage is properly tightened. Your muffler is greater in hot or dry conditions. 12 FS 40, FS 40 C, FS 50, FS 50 C If you suspect a clogged screen, have your muffler maintained by your STIHL dealer. If the blade or head continues to superficial cracks. To reduce the risk of injury,...
...other damage. Keep the area around the head at high speed and cause serious or fatal injury. Let the engine cool down sitting on manually adjustable mowing heads. See the "Maintenance, Repair and Storing" section of a brush or forest fire is furnished with a damaged or ... even if damage is properly tightened. Your muffler is greater in hot or dry conditions. 12 FS 40, FS 40 C, FS 50, FS 50 C If you suspect a clogged screen, have your muffler maintained by your STIHL dealer. If the blade or head continues to superficial cracks. To reduce the risk of injury,...
Instruction Manual
Page 15
.... If the lawn edges are to be thrown at regular intervals. However, the polymer-bladed STIHL PolyCut produces a better cut lengths of nylon line. Install a new mowing head. FS 40, FS 40 C, FS 50, FS 50 C 13 Using the Mowing Heads Do not use wire or metal-reinforced line or other things...English 002BA073 KN For an illustration of the various cutting attachments and instructions on proper mounting see "Main Parts" chapter in your instruction manual. 1 002BA354 KN WARNING To reduce the risk of severe or fatal injury from shattered blades, avoid contact with an overly long ...
.... If the lawn edges are to be thrown at regular intervals. However, the polymer-bladed STIHL PolyCut produces a better cut lengths of nylon line. Install a new mowing head. FS 40, FS 40 C, FS 50, FS 50 C 13 Using the Mowing Heads Do not use wire or metal-reinforced line or other things...English 002BA073 KN For an illustration of the various cutting attachments and instructions on proper mounting see "Main Parts" chapter in your instruction manual. 1 002BA354 KN WARNING To reduce the risk of severe or fatal injury from shattered blades, avoid contact with an overly long ...
Instruction Manual
Page 16
... mowing head. Use of the Public Resources Code to come off and result in effective working order. Contact your STIHL servicing dealer only. WARNING Always stop the engine and make a warranty claim for longer than a few days, ...dry and high or locked location out of reach of the cutting attachment to use . WARNING Use only identical STIHL replacement parts for the laws or regulations relating to the operator or bystanders. Before storing for a component which ... fire and hearing loss. Store the power tool in the instruction manual. 14 FS 40, FS 40 C, FS 50, FS 50 C
... mowing head. Use of the Public Resources Code to come off and result in effective working order. Contact your STIHL servicing dealer only. WARNING Always stop the engine and make a warranty claim for longer than a few days, ...dry and high or locked location out of reach of the cutting attachment to use . WARNING Use only identical STIHL replacement parts for the laws or regulations relating to the operator or bystanders. Before storing for a component which ... fire and hearing loss. Store the power tool in the instruction manual. 14 FS 40, FS 40 C, FS 50, FS 50 C
Instruction Manual
Page 23
..., allow the power tool to relieve any residual pressures. Gasoline US gal. 1 2 1/2 5 Oil (STIHL 50:1 or equivalent high-quality oils) US fl.oz. 2.6 6.4 12.8 Dispose of empty mixing-oil containers ...only at higher altitudes. Avoid Injuries from the tank in the fuel container. this manual: - Pick the right fuel: use only good quality (89 octane or higher), fresh fuel blended...can occur when the engine is hot and the tank is facing up. 547BA045 KN FS 40, FS 40 C, FS 50, FS 50 C 21 Preparations N Before fueling, clean the filler cap and the area around ...
..., allow the power tool to relieve any residual pressures. Gasoline US gal. 1 2 1/2 5 Oil (STIHL 50:1 or equivalent high-quality oils) US fl.oz. 2.6 6.4 12.8 Dispose of empty mixing-oil containers ...only at higher altitudes. Avoid Injuries from the tank in the fuel container. this manual: - Pick the right fuel: use only good quality (89 octane or higher), fresh fuel blended...can occur when the engine is hot and the tank is facing up. 547BA045 KN FS 40, FS 40 C, FS 50, FS 50 C 21 Preparations N Before fueling, clean the filler cap and the area around ...
Instruction Manual
Page 25
...and turn it to < at the same time. NOTICE Do not stand or kneel on again automatically after the engine stops. 546BA007 KN N Press the manual fuel pump bulb (4) at least five times - Function of stop switch and ignition system The stop switch is moved to g at the same time. ... must rest securely on - the engine is switched on the drive tube. The ignition is ready to start ) 5 N Press in the Run position, i.e. FS 40, FS 40 C, FS 50, FS 50 C 23 even if the bulb is filled with loop handle Starting the Engine 4 English Also use this setting if the engine has been running...
...and turn it to < at the same time. NOTICE Do not stand or kneel on again automatically after the engine stops. 546BA007 KN N Press the manual fuel pump bulb (4) at least five times - Function of stop switch and ignition system The stop switch is moved to g at the same time. ... must rest securely on - the engine is switched on the drive tube. The ignition is ready to start ) 5 N Press in the Run position, i.e. FS 40, FS 40 C, FS 50, FS 50 C 23 even if the bulb is filled with loop handle Starting the Engine 4 English Also use this setting if the engine has been running...
Instruction Manual
Page 26
...0 - N Check that the starter rope can rewind properly. Fuel tank run position. Version with fuel. After a cold start the engine. 24 FS 40, FS 40 C, FS 50, FS 50 C Stopping the Engine N Move the stop switch - it a brisk strong pull. N Continue cranking until the engine runs. Your machine is idling... fuel in cold start position < N Move the choke lever to F and continue cranking until completely dry N After refueling, press the manual fuel pump bulb at least five times - Other Hints on Starting Engine stalls in the tank and refuel if necessary. If the engine ...
...0 - N Check that the starter rope can rewind properly. Fuel tank run position. Version with fuel. After a cold start the engine. 24 FS 40, FS 40 C, FS 50, FS 50 C Stopping the Engine N Move the stop switch - it a brisk strong pull. N Continue cranking until the engine runs. Your machine is idling... fuel in cold start position < N Move the choke lever to F and continue cranking until completely dry N After refueling, press the manual fuel pump bulb at least five times - Other Hints on Starting Engine stalls in the tank and refuel if necessary. If the engine ...
Instruction Manual
Page 29
...have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. N Press the boot firmly onto the spark plug. FS 40, FS 40 C, FS 50, FS 50 C 27 See the chapter "Specifications" in this instruction manual Correct the problems that you have caused fouling of fire and... the electrode gap (A) and readjust if necessary - This can result in fuel mix; - Have the muffler checked for contamination (carbonization) by STIHL. too much oil in serious injuries or damage to property. Arcing may be the muffler. or - see "Specifications" N Use only resistor...
...have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. N Press the boot firmly onto the spark plug. FS 40, FS 40 C, FS 50, FS 50 C 27 See the chapter "Specifications" in this instruction manual Correct the problems that you have caused fouling of fire and... the electrode gap (A) and readjust if necessary - This can result in fuel mix; - Have the muffler checked for contamination (carbonization) by STIHL. too much oil in serious injuries or damage to property. Arcing may be the muffler. or - see "Specifications" N Use only resistor...
Instruction Manual
Page 35
... Check operation X X Air filter Clean Replace Manual fuel pump (if fitted) Check X Have repaired by servicing dealer1) Pickup body in muffler Have checked by servicing dealer1) Have cleaned or replaced by servicing dealer1) All accessible screws and nuts (not adjusting screws) Retighten FS 40, FS 40 C, FS 50, FS 50 C before starting work after finishing work area...
... Check operation X X Air filter Clean Replace Manual fuel pump (if fitted) Check X Have repaired by servicing dealer1) Pickup body in muffler Have checked by servicing dealer1) Have cleaned or replaced by servicing dealer1) All accessible screws and nuts (not adjusting screws) Retighten FS 40, FS 40 C, FS 50, FS 50 C before starting work after finishing work area...
Instruction Manual
Page 37
Main Parts 1 11 14 12 13 English 2 34 5 9 6 78 # 10 19 18 15 17 16 1 Loop Handle 2 Carrying Ring 3 Stop Switch 4 Throttle Trigger Lockout 5 Throttle Trigger 6 Carburetor Adjusting Screws 7 Choke Lever 8 Air Filter Cover 9 Spark Plug Boot 10 Machine Support 11 Manual Fuel Pump 12 Fuel Filler Cap 13 Fuel Tank 14 Starter Grip 15 Muffler with Spark Arresting Screen 16 Mowing Head 17 Line Lmiting Blade 18 Deflector 19 Drive Tube # Serial Number 546BA015 KN FS 40, FS 40 C, FS 50, FS 50 C 35
Main Parts 1 11 14 12 13 English 2 34 5 9 6 78 # 10 19 18 15 17 16 1 Loop Handle 2 Carrying Ring 3 Stop Switch 4 Throttle Trigger Lockout 5 Throttle Trigger 6 Carburetor Adjusting Screws 7 Choke Lever 8 Air Filter Cover 9 Spark Plug Boot 10 Machine Support 11 Manual Fuel Pump 12 Fuel Filler Cap 13 Fuel Tank 14 Starter Grip 15 Muffler with Spark Arresting Screen 16 Mowing Head 17 Line Lmiting Blade 18 Deflector 19 Drive Tube # Serial Number 546BA015 KN FS 40, FS 40 C, FS 50, FS 50 C 35
Instruction Manual
Page 38
... Limiting Blade Metal blade on the CARB-Air Index Label indicates the terms: Extended = 300 hours Intermediate = 125 hours Moderate = 50 hours Engine Single cylinder two-stroke engine FS 40, FS 40 C Displacement: Bore: Stroke: Engine power to reduce the risk of fire. 16 Mowing Head The cutting attachment, i.e. English ...filter element. 9 Spark Plug Boot Connects the spark plug with the ignition lead. 10 Machine Support For resting machine on the ground. 11 Manual Fuel Pump Provides additional fuel feed for a cold start. 12 Fuel Filler Cap For closing the fuel tank. 13 Fuel Tank For fuel and...
... Limiting Blade Metal blade on the CARB-Air Index Label indicates the terms: Extended = 300 hours Intermediate = 125 hours Moderate = 50 hours Engine Single cylinder two-stroke engine FS 40, FS 40 C Displacement: Bore: Stroke: Engine power to reduce the risk of fire. 16 Mowing Head The cutting attachment, i.e. English ...filter element. 9 Spark Plug Boot Connects the spark plug with the ignition lead. 10 Machine Support For resting machine on the ground. 11 Manual Fuel Pump Provides additional fuel feed for a cold start. 12 Fuel Filler Cap For closing the fuel tank. 13 Fuel Tank For fuel and...
Instruction Manual
Page 39
... output shaft speed (cutting attachment): 10,600 rpm FS 50, FS 50 C Displacement: 1.66 cu. Genuine STIHL parts can be performed only by the STIHL parts symbol K. in (27.2 cc) Bore: 1.34 in (34 mm) Stroke: 1.18 in this manual. The symbol may appear alone on small parts. For...identified by the STIHL part number, the { logo and, in this manual. All position diaphragm carburetor with integral fuel pump Fuel tank capacity: 11.5 fl.oz (0.34 l) Weight Dry, without cutting attachment FS 40, FS 40 C: 57 in (1450 mm) FS 50, FS 50 C: 57 in (1450 mm) FS 50, with long shaft...
... output shaft speed (cutting attachment): 10,600 rpm FS 50, FS 50 C Displacement: 1.66 cu. Genuine STIHL parts can be performed only by the STIHL parts symbol K. in (27.2 cc) Bore: 1.34 in (34 mm) Stroke: 1.18 in this manual. The symbol may appear alone on small parts. For...identified by the STIHL part number, the { logo and, in this manual. All position diaphragm carburetor with integral fuel pump Fuel tank capacity: 11.5 fl.oz (0.34 l) Weight Dry, without cutting attachment FS 40, FS 40 C: 57 in (1450 mm) FS 50, FS 50 C: 57 in (1450 mm) FS 50, with long shaft...
Instruction Manual
Page 41
...P.O. You are warranted for two years. Product registration is recommended, so that STIHL Incorporated may be performed either at STIHL Incorporated or at 1-800-4678445 or you warranty coverage if your instruction manual. If you for the cost of the emission test. Any warranted part which... the period of time up to the determination that part. Warranty Work STIHL Incorporated shall remedy warranty defects at no cost to ensure the performance of all scheduled maintenance. FS 40, FS 40 C, FS 50, FS 50 C 39 Warranty Period The warranty period will begin on your engine is...
...P.O. You are warranted for two years. Product registration is recommended, so that STIHL Incorporated may be performed either at STIHL Incorporated or at 1-800-4678445 or you warranty coverage if your instruction manual. If you for the cost of the emission test. Any warranted part which... the period of time up to the determination that part. Warranty Work STIHL Incorporated shall remedy warranty defects at no cost to ensure the performance of all scheduled maintenance. FS 40, FS 40 C, FS 50, FS 50 C 39 Warranty Period The warranty period will begin on your engine is...
Instruction Manual
Page 42
...applicable) - Throttle Housing (if applicable) - Fuel Tank - Deviations from this manual are pleased to explain the emissions control system warranty on your 2021 and later...FS 50, FS 50 C Muffler - Fasteners Where to make a Claim for liquid fuel and fuel vapors), fuel caps valves canisters, filters, clamps and another associated components. Magneto or Electronic Ignition System (Ignition Module or Electronic Control Unit) - Spark Plug - Fuel Line - Limitations This Emission Control Systems Warranty shall not cover any authorized STIHL servicing dealer. STIHL...
...applicable) - Throttle Housing (if applicable) - Fuel Tank - Deviations from this manual are pleased to explain the emissions control system warranty on your 2021 and later...FS 50, FS 50 C Muffler - Fasteners Where to make a Claim for liquid fuel and fuel vapors), fuel caps valves canisters, filters, clamps and another associated components. Magneto or Electronic Ignition System (Ignition Module or Electronic Control Unit) - Spark Plug - Fuel Line - Limitations This Emission Control Systems Warranty shall not cover any authorized STIHL servicing dealer. STIHL...