Product Instruction Manual
Page 3
... and Working Techniques" before using your chain saw . Careless or improper use may cause serious or even fatal injury. { MS 271, MS 291, MS 291 C 1 © ANDREAS STIHL AG & Co. Contents English Original Instruction Manual Printed on chlorine-free paper Printing inks contain vegetable oils, paper can go ...38 Shroud 39 Air Filter System 39 Cleaning the Air Filter 40 Engine Management 40 Adjusting the Carburetor 41 Spark Arresting Screen in Muffler 42 Spark Plug 42 Replacing the Starter Rope and Rewind Spring 43 Storing the Machine 46 Checking and Replacing the Chain ...
... and Working Techniques" before using your chain saw . Careless or improper use may cause serious or even fatal injury. { MS 271, MS 291, MS 291 C 1 © ANDREAS STIHL AG & Co. Contents English Original Instruction Manual Printed on chlorine-free paper Printing inks contain vegetable oils, paper can go ...38 Shroud 39 Air Filter System 39 Cleaning the Air Filter 40 Engine Management 40 Adjusting the Carburetor 41 Spark Arresting Screen in Muffler 42 Spark Plug 42 Replacing the Starter Rope and Rewind Spring 43 Storing the Machine 46 Checking and Replacing the Chain ...
Product Instruction Manual
Page 9
... filler caps. To reduce the risk of the STIHL combination wrench or other in the chapter "Mounting the Bar and Chain" of fuel spillage and fire, tighten the fuel filler cap by hand as securely as possible. MS 271, MS 291, MS 291 C 7 In order to the idle position....chain is (are) tightened securely after having tightened the nut(s) and thereafter at regular intervals (whenever the saw is securely mounted on the spark plug - Always make sure the hexagonal nut(s) for additional information. Proper starting , particularly the throttle trigger, throttle trigger lockout, stop switch and...
... filler caps. To reduce the risk of the STIHL combination wrench or other in the chapter "Mounting the Bar and Chain" of fuel spillage and fire, tighten the fuel filler cap by hand as securely as possible. MS 271, MS 291, MS 291 C 7 In order to the idle position....chain is (are) tightened securely after having tightened the nut(s) and thereafter at regular intervals (whenever the saw is securely mounted on the spark plug - Always make sure the hexagonal nut(s) for additional information. Proper starting , particularly the throttle trigger, throttle trigger lockout, stop switch and...
Product Instruction Manual
Page 13
... switch to 0 or STOP. Warning! To reduce the risk of a thrown or broken chain. MS 271, MS 291, MS 291 C 11 Warning! clutch, polymer housing components) - It is blocked increases the load and will cause...or the chain brake is dangerous and can then increase the risk of the cylinder, spark plug) become hot during normal operation may result in the feel of fire and burn ...). From time to time, the catcher may also permanently damage the engine. Never modify your STIHL servicing dealer only. which can cause severe or fatal injury, respiratory illness or cancer. move for...
... switch to 0 or STOP. Warning! To reduce the risk of a thrown or broken chain. MS 271, MS 291, MS 291 C 11 Warning! clutch, polymer housing components) - It is blocked increases the load and will cause...or the chain brake is dangerous and can then increase the risk of the cylinder, spark plug) become hot during normal operation may result in the feel of fire and burn ...). From time to time, the catcher may also permanently damage the engine. Never modify your STIHL servicing dealer only. which can cause severe or fatal injury, respiratory illness or cancer. move for...
Product Instruction Manual
Page 25
...boot may reduce friction of the band on your STIHL chain saw to reduce the risk of fire, never operate your machine with a removed spark plug, since uncontained sparking may damage parts of the machine. Always press spark plug boot snugly onto spark plug terminal of the proper size. (Note: If ... or modified. Store chain saw if the muffler is a change in a dry place and away from the spark plug or with a pressure washer. MS 271, MS 291, MS 291 C 23 Do not operate your STIHL servicing dealer for the chain brake on the drum. Like an automobile brake, a chain saw is engaged. ...
...boot may reduce friction of the band on your STIHL chain saw to reduce the risk of fire, never operate your machine with a removed spark plug, since uncontained sparking may damage parts of the machine. Always press spark plug boot snugly onto spark plug terminal of the proper size. (Note: If ... or modified. Store chain saw if the muffler is a change in a dry place and away from the spark plug or with a pressure washer. MS 271, MS 291, MS 291 C 23 Do not operate your STIHL servicing dealer for the chain brake on the drum. Like an automobile brake, a chain saw is engaged. ...
Product Instruction Manual
Page 39
...chain brake is off the engine N Move the Master Control Lever to the stop position 0 N Remove the spark plug - N Move the Master Control Lever to bed in during the break-in period, the frictional resistances in the... period. The engine develops its maximum power after about 5 to clear the combustion chamber N Replace the spark plug - see "Spark plug" N Dry spark plug N Crank the engine several times with the chain brake engaged (chain locked) will quickly damage the clutch... (clutch, chain brake). the chain saw chain is released - MS 271, MS 291, MS 291 C 37 this period.
...chain brake is off the engine N Move the Master Control Lever to the stop position 0 N Remove the spark plug - N Move the Master Control Lever to bed in during the break-in period, the frictional resistances in the... period. The engine develops its maximum power after about 5 to clear the combustion chamber N Replace the spark plug - see "Spark plug" N Dry spark plug N Crank the engine several times with the chain brake engaged (chain locked) will quickly damage the clutch... (clutch, chain brake). the chain saw chain is released - MS 271, MS 291, MS 291 C 37 this period.
Product Instruction Manual
Page 44
... on power, difficult to start or runs poorly at part throttle etc.) affect the condition of the spark plug. N Pull off the spark plug boot. N Use only resistor type spark plugs of spark plug: 000BA039 KN 42 MS 271, MS 291, MS 291 C N Pull out the spark arresting screen (2). N Push the combination fully home against the cylinder. N Insert the screw and tighten it as...
... on power, difficult to start or runs poorly at part throttle etc.) affect the condition of the spark plug. N Pull off the spark plug boot. N Use only resistor type spark plugs of spark plug: 000BA039 KN 42 MS 271, MS 291, MS 291 C N Pull out the spark arresting screen (2). N Push the combination fully home against the cylinder. N Insert the screw and tighten it as...
Product Instruction Manual
Page 45
...MS 271, MS 291, MS 291 C 43 N Tighten down firmly. Always press spark plug boot (1) snugly onto spark plug terminal (2) of fire and burn injury, use only spark plugs... authorized by hand. Dirty air filter. - - To reduce the risk of the proper size. (Note: If terminal has detachable SAE adapter nut, it must be attached.) A loose connection between spark plug...spark plug through the grommet and screw it down the spark plug...
...MS 271, MS 291, MS 291 C 43 N Tighten down firmly. Always press spark plug boot (1) snugly onto spark plug terminal (2) of fire and burn injury, use only spark plugs... authorized by hand. Dirty air filter. - - To reduce the risk of the proper size. (Note: If terminal has detachable SAE adapter nut, it must be attached.) A loose connection between spark plug...spark plug through the grommet and screw it down the spark plug...
Product Instruction Manual
Page 54
.... X X X X X X X X X X X X 52 MS 271, MS 291, MS 291 C English The following intervals apply to 20 hours of operating, then every 150 hours Check X Chain catcher Replace Safety labels Replace 1) STIHL recommends a STIHL servicing dealer. 2) see chapter on fan housing Clean X X Cylinder fins Clean... - chain must not rotate X X Readjust idle Spark plug Readjust electrode gap Replace after every 100 operating hours All accessible screws and nuts (not adjusting screws) 3) Retighten Spark arresting screen in muffler Check Clean or replace Combustion chamber...
.... X X X X X X X X X X X X 52 MS 271, MS 291, MS 291 C English The following intervals apply to 20 hours of operating, then every 150 hours Check X Chain catcher Replace Safety labels Replace 1) STIHL recommends a STIHL servicing dealer. 2) see chapter on fan housing Clean X X Cylinder fins Clean... - chain must not rotate X X Readjust idle Spark plug Readjust electrode gap Replace after every 100 operating hours All accessible screws and nuts (not adjusting screws) 3) Retighten Spark arresting screen in muffler Check Clean or replace Combustion chamber...
Product Instruction Manual
Page 55
... Cap 16 Muffler (with Spark Arresting Screen) 17 Front Hand Guard 18 Front Handle (Handlebar) 19 Spark Plug Boot 20 Starter Grip 21 Fuel Filler Cap 22 Master Control Lever 23 Throttle Trigger 24 Throttle Trigger Lockout 25 Rear Handle 26 Rear Hand Guard # Serial Number 2710BA002 KN MS 271, MS 291, MS 291 C 1) Depending on Model 53
... Cap 16 Muffler (with Spark Arresting Screen) 17 Front Hand Guard 18 Front Handle (Handlebar) 19 Spark Plug Boot 20 Starter Grip 21 Fuel Filler Cap 22 Master Control Lever 23 Throttle Trigger 24 Throttle Trigger Lockout 25 Rear Handle 26 Rear Hand Guard # Serial Number 2710BA002 KN MS 271, MS 291, MS 291 C 1) Depending on Model 53
Product Instruction Manual
Page 56
...to be activated. 25 Rear Handle The support handle for the right hand, located at the front of the saw. 19 Spark Plug Boot Connects the spark plug with Spark Arresting Screen) Muffler reduces engine exhaust noise and diverts exhaust gases away from touching the chain if it breaks or comes off...the engine. 24 Throttle Trigger Lockout Must be depressed before the throttle trigger can be released to the operator's hands. (not illustrated) 54 MS 271, MS 291, MS 291 C It also serves as the lever for chain brake activation. 18 Front Handle (Handlebar) Handlebar for the left hand at the rear ...
...to be activated. 25 Rear Handle The support handle for the right hand, located at the front of the saw. 19 Spark Plug Boot Connects the spark plug with Spark Arresting Screen) Muffler reduces engine exhaust noise and diverts exhaust gases away from touching the chain if it breaks or comes off...the engine. 24 Throttle Trigger Lockout Must be depressed before the throttle trigger can be released to the operator's hands. (not illustrated) 54 MS 271, MS 291, MS 291 C It also serves as the lever for chain brake activation. 18 Front Handle (Handlebar) Handlebar for the left hand at the rear ...
Product Instruction Manual
Page 57
...25 mm) Drive link gauge: 0.063 in. (1.6 mm) MS 271, MS 291, MS 291 C 55 in. (55.5 cm3) Bore: 1.85 in. (47.0 mm) Stroke: 1.26 in the section "Safety Precautions and Working Techniques". Rollomatic E guide bars STIHL reduced kickback guide bars (with Sec. 5.11 of operating hours...MS 291, MS 291 C Displacement: 3.39 cu. in. (50.2 cm3) Bore: 1.76 in. (44.7 mm) Stroke: 1.26 in. (32 mm) Engine power to ISO 7293: 3.5 hp (2.6 kW) at 9,500 rpm Idle speed: 2,800 rpm Maximum permissible speed with bar and chain: 13,000 rpm Ignition system Electronic magneto ignition Spark plug...
...25 mm) Drive link gauge: 0.063 in. (1.6 mm) MS 271, MS 291, MS 291 C 55 in. (55.5 cm3) Bore: 1.85 in. (47.0 mm) Stroke: 1.26 in the section "Safety Precautions and Working Techniques". Rollomatic E guide bars STIHL reduced kickback guide bars (with Sec. 5.11 of operating hours...MS 291, MS 291 C Displacement: 3.39 cu. in. (50.2 cm3) Bore: 1.76 in. (44.7 mm) Stroke: 1.26 in. (32 mm) Engine power to ISO 7293: 3.5 hp (2.6 kW) at 9,500 rpm Idle speed: 2,800 rpm Maximum permissible speed with bar and chain: 13,000 rpm Ignition system Electronic magneto ignition Spark plug...
Product Instruction Manual
Page 61
... by the failure of a warranted part still under warranty. Carburetor - Spark Plug - Fuel Line - Clamps - Limitations This Emission Control Systems Warranty shall not cover any authorized STIHL servicing dealer and present the signed warranty card. damages to other engine ...® EASYSTART® FARM BOSS® iCademy® OILOMATIC® STIHL Cutquik® STIHL DUROMATIC® STIHL Quickstop® STIHL ROLLOMATIC® STIHL WOOD BOSS® TIMBERSPORTS® WOOD BOSS® YARD BOSS® MS 271, MS 291, MS 291 C 59 Registrations #2,821,860; #3,010,057, #3,010,058, #3,...
... by the failure of a warranted part still under warranty. Carburetor - Spark Plug - Fuel Line - Clamps - Limitations This Emission Control Systems Warranty shall not cover any authorized STIHL servicing dealer and present the signed warranty card. damages to other engine ...® EASYSTART® FARM BOSS® iCademy® OILOMATIC® STIHL Cutquik® STIHL DUROMATIC® STIHL Quickstop® STIHL ROLLOMATIC® STIHL WOOD BOSS® TIMBERSPORTS® WOOD BOSS® YARD BOSS® MS 271, MS 291, MS 291 C 59 Registrations #2,821,860; #3,010,057, #3,010,058, #3,...
Parts List
Page 4
... - 25 2 Plug 24 1141 140 8100 1 Spark arresting screen (2,5,7,9) USA 25 9039 475 0656 1 Self-tapping screw M4x9.6 (2,5,7,9) USA 26 9075 478 4085 2 Pan head self-tapping screw IS-D5x18 27 0783 830 2000 1 Tube of sealant Dirko HT red (B) (1) MS 271, (2) MS 271-Z, (3) MS 271 C-BE, (4) MS 291, (5) MS 291-Z, (6) MS 291 C-BE, (7) MS 291 C-BE Z, (8) MS 291 C-BEQ, (9) MS 291 C-BEQ Z MS 271, MS 271 C, MS 291, MS 291 C 4 SCS 01...
... - 25 2 Plug 24 1141 140 8100 1 Spark arresting screen (2,5,7,9) USA 25 9039 475 0656 1 Self-tapping screw M4x9.6 (2,5,7,9) USA 26 9075 478 4085 2 Pan head self-tapping screw IS-D5x18 27 0783 830 2000 1 Tube of sealant Dirko HT red (B) (1) MS 271, (2) MS 271-Z, (3) MS 271 C-BE, (4) MS 291, (5) MS 291-Z, (6) MS 291 C-BE, (7) MS 291 C-BE Z, (8) MS 291 C-BEQ, (9) MS 291 C-BEQ Z MS 271, MS 271 C, MS 291, MS 291 C 4 SCS 01...
Parts List
Page 12
... 0603 1 Torsion spring 9 1106 405 1000 1 Spark plug boot 10 9075 478 3018 2 Pan head self-tapping screw IS-D4x18 11 9291 021 0100 2 Washer 4.3 12 0000 400 7000 1 Spark plug NGK BPMR7A 13 1141 440 3000 1 Wiring harness (1) MS 271, (2) MS 271-Z, (3) MS 271 C-BE, (4) MS 291, (5) MS 291-Z, (6) MS 291 C-BE, (7) MS 291 C-BE Z, (8) MS 291 C-BEQ, (9) MS 291 C-BEQ Z MS 271, MS 271 C, MS 291, MS 291 C 12 SCS 01-2011 3.33
... 0603 1 Torsion spring 9 1106 405 1000 1 Spark plug boot 10 9075 478 3018 2 Pan head self-tapping screw IS-D4x18 11 9291 021 0100 2 Washer 4.3 12 0000 400 7000 1 Spark plug NGK BPMR7A 13 1141 440 3000 1 Wiring harness (1) MS 271, (2) MS 271-Z, (3) MS 271 C-BE, (4) MS 291, (5) MS 291-Z, (6) MS 291 C-BE, (7) MS 291 C-BE Z, (8) MS 291 C-BEQ, (9) MS 291 C-BEQ Z MS 271, MS 271 C, MS 291, MS 291 C 12 SCS 01-2011 3.33