Product Instruction Manual
Page 3
...as with any of personal injury. Careless or improper use may cause serious or even fatal injury. { MS 271, MS 291, MS 291 C 1 © ANDREAS STIHL AG & Co. Warning! Because a chain saw , it is a high-speed wood-cutting tool, some special safety precautions must be recycled. ... Machine 46 Checking and Replacing the Chain Sprocket 46 Maintaining and Sharpening the Saw Chain 47 Maintenance and Care 51 Main Parts 53 Specifications 55 Special Accessories 56 Ordering Spare Parts 57 Maintenance and Repairs 57 STIHL Incorporated Federal Emission Control Warranty Statement...
...as with any of personal injury. Careless or improper use may cause serious or even fatal injury. { MS 271, MS 291, MS 291 C 1 © ANDREAS STIHL AG & Co. Warning! Because a chain saw , it is a high-speed wood-cutting tool, some special safety precautions must be recycled. ... Machine 46 Checking and Replacing the Chain Sprocket 46 Maintaining and Sharpening the Saw Chain 47 Maintenance and Care 51 Main Parts 53 Specifications 55 Special Accessories 56 Ordering Spare Parts 57 Maintenance and Repairs 57 STIHL Incorporated Federal Emission Control Warranty Statement...
Product Instruction Manual
Page 9
... that could ignite combustible fumes and cause a fire. Never try to loosen or come off and spill quantities of the STIHL combination wrench or other in your saw is shut off). In order to avoid improper setting, the tensioning procedure must move...chain is running! Proper tension of the instruction manual. To reduce the risk of the instruction manual.) Warning! MS 271, MS 291, MS 291 C 7 Always make sure the hexagonal nut(s) for proper condition and operation. (See the maintenance chart near the end of fire and burn injuries, start the saw for the sprocket...
... that could ignite combustible fumes and cause a fire. Never try to loosen or come off and spill quantities of the STIHL combination wrench or other in your saw is shut off). In order to avoid improper setting, the tensioning procedure must move...chain is running! Proper tension of the instruction manual. To reduce the risk of the instruction manual.) Warning! MS 271, MS 291, MS 291 C 7 Always make sure the hexagonal nut(s) for proper condition and operation. (See the maintenance chart near the end of fire and burn injuries, start the saw for the sprocket...
Product Instruction Manual
Page 10
...clutch to your arm on the front handle in injury to engage the sprocket and, if the chain brake is started , the engine speed with your chain saw allows you cannot set the correct idle speed, have your STIHL dealer check your hand. Keep your hand or fingers and may lose..., do not wrap the starter rope around the handles. 8 MS 271, MS 291, MS 291 C Warning! To reduce this procedure may cause kickback to start . When you and all other solid surface in a cut or kerf. Warning! Do not drop start the chain saw . Never attempt to occur (see the appropriate section of...
...clutch to your arm on the front handle in injury to engage the sprocket and, if the chain brake is started , the engine speed with your chain saw allows you cannot set the correct idle speed, have your STIHL dealer check your hand. Keep your hand or fingers and may lose..., do not wrap the starter rope around the handles. 8 MS 271, MS 291, MS 291 C Warning! To reduce this procedure may cause kickback to start . When you and all other solid surface in a cut or kerf. Warning! Do not drop start the chain saw . Never attempt to occur (see the appropriate section of...
Product Instruction Manual
Page 25
... make sure it is used and other factors. Keep the chain, bar and sprocket clean; replace worn sprockets or chains. Like an automobile brake, a chain saw to the limited warranty statement near the end of fire...may create arcing that the risk of the band on the wood. Do not operate your STIHL chain saw chain brake incurs wear each time it and the ignition lead are always clean and in the ... fumes and cause a fire. Keep the chain sharp. twice a year, Occasional usage - MS 271, MS 291, MS 291 C 23 If your machine with the spark plug boot removed from children.
... make sure it is used and other factors. Keep the chain, bar and sprocket clean; replace worn sprockets or chains. Like an automobile brake, a chain saw to the limited warranty statement near the end of fire...may create arcing that the risk of the band on the wood. Do not operate your STIHL chain saw chain brake incurs wear each time it and the ignition lead are always clean and in the ... fumes and cause a fire. Keep the chain sharp. twice a year, Occasional usage - MS 271, MS 291, MS 291 C 23 If your machine with the spark plug boot removed from children.
Product Instruction Manual
Page 26
... that comes standard is an audible click - Fitting the chain Wear work gloves to exactly match the chain saw chains and chain sprockets. start at the bar nose. 143BA003 KN 001BA186 KN 24 MS 271, MS 291, MS 291 C N Fit the chain - If non-matching components are used, the cutting attachment... must match the groove width of the housing slot. 001BA185 KN 143BA034 KN Disengaging the chain brake. The pitch (t) of the saw chain (1), chain sprocket and the nose sprocket of the saw chain (1) must match. - N Pull the hand guarad towards the front handle until the ...
... that comes standard is an audible click - Fitting the chain Wear work gloves to exactly match the chain saw chains and chain sprockets. start at the bar nose. 143BA003 KN 001BA186 KN 24 MS 271, MS 291, MS 291 C N Fit the chain - If non-matching components are used, the cutting attachment... must match the groove width of the housing slot. 001BA185 KN 143BA034 KN Disengaging the chain brake. The pitch (t) of the saw chain (1), chain sprocket and the nose sprocket of the saw chain (1) must match. - N Pull the hand guarad towards the front handle until the ...
Product Instruction Manual
Page 27
... on the top of the tensioner slide in the lower hole. 172BA009 KN MS 271, MS 291, MS 291 C 25 N Refit the sprocket cover and screw on "Tensioning the Saw Chain" 1 3 2 N Pull out the hinged clip (1) so that the stud (4) projects through the upper hole and the ...the nuts only fingertight. N Turn the tensioning screw (4)clockwise until it snaps into position. 3 11 24 Mounting the Bar and Chain (quick chain tensioner) Remove the chain sprocket cover. N Removing the sprocket cover N Remove the tensioning gear (1) and turn it over. 2 N Unscrew the nut (2). 1 4 3 5 N Position...
... on the top of the tensioner slide in the lower hole. 172BA009 KN MS 271, MS 291, MS 291 C 25 N Refit the sprocket cover and screw on "Tensioning the Saw Chain" 1 3 2 N Pull out the hinged clip (1) so that the stud (4) projects through the upper hole and the ...the nuts only fingertight. N Turn the tensioning screw (4)clockwise until it snaps into position. 3 11 24 Mounting the Bar and Chain (quick chain tensioner) Remove the chain sprocket cover. N Removing the sprocket cover N Remove the tensioning gear (1) and turn it over. 2 N Unscrew the nut (2). 1 4 3 5 N Position...
Product Instruction Manual
Page 28
...the guide bar so that the wingnut locates on to the stud as far as stop . 3 172BA013 KN 172BA014 KN N Fit the chain sprocket cover so that the tensioning gear is disengaged. start at the bar nose. N Make sure the drive link tangs engage the bar ... tensioning gear (1) clockwise as far as stop by hand. the collar screw (3) engages the hole in position - Releasing the chain brake N Fit the chain over the sprocket (2). N Fit the chain - 172BA012 KN English 2 Fitting the chain 3 2 172BA010 KN N Screw the nut (2) on the collar screw (3). 26 MS 271, MS 291, MS 291 C
...the guide bar so that the wingnut locates on to the stud as far as stop . 3 172BA013 KN 172BA014 KN N Fit the chain sprocket cover so that the tensioning gear is disengaged. start at the bar nose. N Make sure the drive link tangs engage the bar ... tensioning gear (1) clockwise as far as stop by hand. the collar screw (3) engages the hole in position - Releasing the chain brake N Fit the chain over the sprocket (2). N Fit the chain - 172BA012 KN English 2 Fitting the chain 3 2 172BA010 KN N Screw the nut (2) on the collar screw (3). 26 MS 271, MS 291, MS 291 C
Product Instruction Manual
Page 29
...". 1 2 Retensioning during cutting work : N Shut off the engine. N Turn the adjusting wheel (1) clockwise as far as stop. N Check chain tension frequently - MS 271, MS 291, MS 291 C 27 N If necessary, turn the tensioning screw (1) clockwise until the sprocket cover can be pushed flush against the underside of the tensioning gear and adjusting wheel mesh properly. N Hold the...
...". 1 2 Retensioning during cutting work : N Shut off the engine. N Turn the adjusting wheel (1) clockwise as far as stop. N Check chain tension frequently - MS 271, MS 291, MS 291 C 27 N If necessary, turn the tensioning screw (1) clockwise until the sprocket cover can be pushed flush against the underside of the tensioning gear and adjusting wheel mesh properly. N Hold the...
Product Instruction Manual
Page 48
... system, depress throttle trigger lockout beforehand 46 MS 271, MS 291, MS 291 C use check gauge (special accessory) to test Using two saw chain is dry - this helps prevent the carburetor diaphragms sticking together. STIHL BioPlus, completely fill the chain oil tank. after use a biological chain and bar lubricant, e.g. Use only STIHL original chain sprockets to help ensure reliable functioning of fuel...
... system, depress throttle trigger lockout beforehand 46 MS 271, MS 291, MS 291 C use check gauge (special accessory) to test Using two saw chain is dry - this helps prevent the carburetor diaphragms sticking together. STIHL BioPlus, completely fill the chain oil tank. after use a biological chain and bar lubricant, e.g. Use only STIHL original chain sprockets to help ensure reliable functioning of fuel...
Product Instruction Manual
Page 49
... files have your chain resharpened by a STIHL servicing dealer. You must observe certain angles when resharpening the chain cutter. A B 689BA021 KN A Filing angle B Side plate angle MS 271, MS 291, MS 291 C 47 Do not work with a correctly sharpened chain A properly sharpened chain slices through wood ... chain sharpening files. N Clean the chain. N Replace any damaged or worn parts of the chain and match the new parts to chain pitch - and in the links and damaged rivets. Install spur chain sprocket / rim sprocket N Clean crankshaft stub and needle cage and lubricate with STIHL...
... files have your chain resharpened by a STIHL servicing dealer. You must observe certain angles when resharpening the chain cutter. A B 689BA021 KN A Filing angle B Side plate angle MS 271, MS 291, MS 291 C 47 Do not work with a correctly sharpened chain A properly sharpened chain slices through wood ... chain sharpening files. N Clean the chain. N Replace any damaged or worn parts of the chain and match the new parts to chain pitch - and in the links and damaged rivets. Install spur chain sprocket / rim sprocket N Clean crankshaft stub and needle cage and lubricate with STIHL...
Product Instruction Manual
Page 53
... filter element X X Replace X X X Fuel tank Clean X Chain oil tank Clean X Chain lubrication Check X Inspect, also check sharpness X X Saw chain Check chain tension X X Sharpen X Check (wear, damage) X Guide bar Clean and turn over Deburr X X Replace X X Chain sprocket Check X Air filter Clean Replace X X X Antivibration elements Check X Have replaced by dealer1) X X MS 271, MS 291, MS 291 C 51 If you only use the saw...
... filter element X X Replace X X X Fuel tank Clean X Chain oil tank Clean X Chain lubrication Check X Inspect, also check sharpness X X Saw chain Check chain tension X X Sharpen X Check (wear, damage) X Guide bar Clean and turn over Deburr X X Replace X X Chain sprocket Check X Air filter Clean Replace X X X Antivibration elements Check X Have replaced by dealer1) X X MS 271, MS 291, MS 291 C 51 If you only use the saw...
Product Instruction Manual
Page 55
... Shroud Lock 2 Carburetor Adjusting Screws 3 Fuel Pump1) 4 Shutter (Summer and Winter Operation) 5 Chain Brake 6 Chain Sprocket 7 Chain Sprocket Cover 8 Chain Catcher 9 Side Chain Tensioner1) 10 Bumper Spike 11 Guide Bar 12 Oilomatic Saw Chain 13 Adjusting Wheel1) for Quick Chain Tensioner 14 Handle of Wingnut1) for Quick Chain Tensioner 15 Oil Filler Cap 16 Muffler (with Spark Arresting Screen) 17... 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
... Shroud Lock 2 Carburetor Adjusting Screws 3 Fuel Pump1) 4 Shutter (Summer and Winter Operation) 5 Chain Brake 6 Chain Sprocket 7 Chain Sprocket Cover 8 Chain Catcher 9 Side Chain Tensioner1) 10 Bumper Spike 11 Guide Bar 12 Oilomatic Saw Chain 13 Adjusting Wheel1) for Quick Chain Tensioner 14 Handle of Wingnut1) for Quick Chain Tensioner 15 Oil Filler Cap 16 Muffler (with Spark Arresting Screen) 17... 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
... engine is heated in a kickback situation by the operator's hand or by inertia. 6 Chain Sprocket The toothed wheel that drives the saw . 26 Rear Hand Guard Gives added protection to the operator's hands. (not illustrated) 54 MS 271, MS 291, MS 291 C English Definitions 1 Shroud Lock Lock for the shroud. 2 Carburetor Adjusting Screws For tuning the carburetor...
... engine is heated in a kickback situation by the operator's hand or by inertia. 6 Chain Sprocket The toothed wheel that drives the saw . 26 Rear Hand Guard Gives added protection to the operator's hands. (not illustrated) 54 MS 271, MS 291, MS 291 C English Definitions 1 Shroud Lock Lock for the shroud. 2 Carburetor Adjusting Screws For tuning the carburetor...
Product Instruction Manual
Page 57
... width: 0.063 in. (1.6 mm) Sprocket nose: 11 tooth Saw chains 0.325" STIHL reduced kickback saw chain" in the section "Safety Precautions and Working Techniques". Category A = 300 hours B = 125 hours C = 50 hours Engine STIHL single cylinder two-stroke engine MS 271, MS 271 C Displacement: 3.06 cu. in...1.26 in. (32 mm) Engine power to meet Federal emission requirements. Rollomatic E guide bars STIHL reduced kickback guide bars (with bar and chain: 13,000 rpm MS 291, MS 291 C Displacement: 3.39 cu. Specifications EPA / CEPA The Emission Compliance Period referred to on the...
... width: 0.063 in. (1.6 mm) Sprocket nose: 11 tooth Saw chains 0.325" STIHL reduced kickback saw chain" in the section "Safety Precautions and Working Techniques". Category A = 300 hours B = 125 hours C = 50 hours Engine STIHL single cylinder two-stroke engine MS 271, MS 271 C Displacement: 3.06 cu. in...1.26 in. (32 mm) Engine power to meet Federal emission requirements. Rollomatic E guide bars STIHL reduced kickback guide bars (with bar and chain: 13,000 rpm MS 291, MS 291 C Displacement: 3.39 cu. Specifications EPA / CEPA The Emission Compliance Period referred to on the...
Product Instruction Manual
Page 58
001BA209 KN English Chain sprocket 7-tooth for .325" In order to which they have been designated as "low kickback" saw chains in inches on the other. 56 MS 271, MS 291, MS 291 C Since new bar/chain combinations may be available for information regarding special accessories that may be developed after...the chain scabbard extension onto the scabbard 1 234 cm INCH 1 234 N Determine the appropriate set of locking tabs is available as meeting the ANSI Sec. 5.11 requirements on the scabbard. Special Accessories Contact your STIHL dealer for your STIHL dealer for the latest STIHL ...
001BA209 KN English Chain sprocket 7-tooth for .325" In order to which they have been designated as "low kickback" saw chains in inches on the other. 56 MS 271, MS 291, MS 291 C Since new bar/chain combinations may be available for information regarding special accessories that may be developed after...the chain scabbard extension onto the scabbard 1 234 cm INCH 1 234 N Determine the appropriate set of locking tabs is available as meeting the ANSI Sec. 5.11 requirements on the scabbard. Special Accessories Contact your STIHL dealer for your STIHL dealer for the latest STIHL ...
Parts List
Page 6
... 162 1001 1 Cover washer 11 9512 933 2260 1 Needle cage 10x13x10 12 1141 640 2001 1 Chain sprocket 0.325" 7T (1-7) 13 1141 640 2003 1 Chain sprocket 3/8" 7T (4,6) 14 0000 958 1022 1 Washer Ø 27 mm 15 9460 624 0801 1 E-clip 8x1.3 (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 6 SCS 01-2011 3.33
... 162 1001 1 Cover washer 11 9512 933 2260 1 Needle cage 10x13x10 12 1141 640 2001 1 Chain sprocket 0.325" 7T (1-7) 13 1141 640 2003 1 Chain sprocket 3/8" 7T (4,6) 14 0000 958 1022 1 Washer Ø 27 mm 15 9460 624 0801 1 E-clip 8x1.3 (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 6 SCS 01-2011 3.33
Parts List
Page 8
Drawing D Chain brake Reference Item number 1 1128 160 5000 2 1121 162 5010 3 0000 997 0628 4 9460 624 0400 5 9460 624 0400 6 1141 ... 18 1 Chain sprocket 3/8" 7T (D) (8) 1 Chain sprocket 0.325" 7T (D) (8,9) 1 Washer Ø 27 mm (8,9) 20 9460 624 0801 1 E-clip 8x1.3 (8,9) 21 1141 021 1101 1 Cover (1,2,4,5) 22 1141 021 1103 1 Cover (3,6-9) 23 9074 477 2995 3 Pan head self-tapping screw IS-P4x12 (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 8 ...
Drawing D Chain brake Reference Item number 1 1128 160 5000 2 1121 162 5010 3 0000 997 0628 4 9460 624 0400 5 9460 624 0400 6 1141 ... 18 1 Chain sprocket 3/8" 7T (D) (8) 1 Chain sprocket 0.325" 7T (D) (8,9) 1 Washer Ø 27 mm (8,9) 20 9460 624 0801 1 E-clip 8x1.3 (8,9) 21 1141 021 1101 1 Cover (1,2,4,5) 22 1141 021 1103 1 Cover (3,6-9) 23 9074 477 2995 3 Pan head self-tapping screw IS-P4x12 (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 8 ...
Parts List
Page 9
Drawing E Chain tensioner, Chain sprocket cover MS 271, MS 271 C, MS 291, MS 291 C 9 SCS 01-2011 3.33
Drawing E Chain tensioner, Chain sprocket cover MS 271, MS 271 C, MS 291, MS 291 C 9 SCS 01-2011 3.33
Parts List
Page 10
... 1 Cover (1,2,4,5) 1 Pan head self-tapping screw IS-P4x12 (1,2,4,5) 1 Chain sprocket cover (1,2,4,5) ☐ 8 2 Bumper strip (1,2,4,5) 2 Hexagon nut M8 ...Chain sprocket cover (3,6-9) ☐ 18 - 21 18 1135 656 1500 1 Guard (3,6-9) 19 9076 478 2996 1 Pan head self-tapping screw P4x12 (3,6-9) 20 1135 648 3800 1 Cover plate (3,6-9) 21 1121 648 2200 1 Adjusting wheel (3,6-9) 22 1121 660 1000 1 Wing nut (3,6-9) (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...
... 1 Cover (1,2,4,5) 1 Pan head self-tapping screw IS-P4x12 (1,2,4,5) 1 Chain sprocket cover (1,2,4,5) ☐ 8 2 Bumper strip (1,2,4,5) 2 Hexagon nut M8 ...Chain sprocket cover (3,6-9) ☐ 18 - 21 18 1135 656 1500 1 Guard (3,6-9) 19 9076 478 2996 1 Pan head self-tapping screw P4x12 (3,6-9) 20 1135 648 3800 1 Cover plate (3,6-9) 21 1121 648 2200 1 Adjusting wheel (3,6-9) 22 1121 660 1000 1 Wing nut (3,6-9) (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...