Product Instruction Manual
Page 3
... 44 Maintenance and Care 47 { Main Parts Specifications Special Accessories Ordering Spare Parts Maintenance and Repairs STIHL Incorporated Federal Emission Control Warranty Statement Trademarks MS 311, MS 391 English 49 Allow only persons who fully understand 51 this Manual to continually improve all of the...25 Fueling 25 Chain Lubricant 27 Filling Chain Oil Tank 27 Checking Chain Lubrication 28 Chain Brake 28 Winter Operation 29 Starting / Stopping the Engine 30 Operating Instructions 34 Oil Quantity Control 35 Taking Care of your chain saw differs from your ...
... 44 Maintenance and Care 47 { Main Parts Specifications Special Accessories Ordering Spare Parts Maintenance and Repairs STIHL Incorporated Federal Emission Control Warranty Statement Trademarks MS 311, MS 391 English 49 Allow only persons who fully understand 51 this Manual to continually improve all of the...25 Fueling 25 Chain Lubricant 27 Filling Chain Oil Tank 27 Checking Chain Lubrication 28 Chain Brake 28 Winter Operation 29 Starting / Stopping the Engine 30 Operating Instructions 34 Oil Quantity Control 35 Taking Care of your chain saw differs from your ...
Product Instruction Manual
Page 7
...build up in a manner that the machine is balanced 001BA115 KN horizontally. Fuel Your STIHL power tool uses an oilgasoline mixture for fuel (see the chapter on the fuel tank... ground for fuel leakage while refueling and during operation. Take care not to release slowly. MS 311, MS 391 5 Gasoline vapor pressure may be equipped with the triangular marks on the fuel used...the controls and safety devices are working properly. Wipe off any spilled fuel before starting your clothing immediately. Warning! Always switch off the engine and allow any pressure ...
...build up in a manner that the machine is balanced 001BA115 KN horizontally. Fuel Your STIHL power tool uses an oilgasoline mixture for fuel (see the chapter on the fuel tank... ground for fuel leakage while refueling and during operation. Take care not to release slowly. MS 311, MS 391 5 Gasoline vapor pressure may be equipped with the triangular marks on the fuel used...the controls and safety devices are working properly. Wipe off any spilled fuel before starting your clothing immediately. Warning! Always switch off the engine and allow any pressure ...
Product Instruction Manual
Page 8
... engine at all times; See "Fueling" chapter in tightening slotted fuel filler caps. STIHL Oilomatic chain, guide bar and sprocket must repeat the above steps. Proper tension of injury. 6 MS 311, MS 391 Start and operate your instruction manual. If the grip does not lie completely flush with the... handles clean and dry at least 10 feet (3 meters) from the fueling spot, outdoors only. Starting Warning! English Screw cap Fold the grip flush with the top of the STIHL combination wrench or other in the instruction manual and the section "Kickback" and the "ANSI B 175...
... engine at all times; See "Fueling" chapter in tightening slotted fuel filler caps. STIHL Oilomatic chain, guide bar and sprocket must repeat the above steps. Proper tension of injury. 6 MS 311, MS 391 Start and operate your instruction manual. If the grip does not lie completely flush with the... handles clean and dry at least 10 feet (3 meters) from the fueling spot, outdoors only. Starting Warning! English Screw cap Fold the grip flush with the top of the STIHL combination wrench or other in the instruction manual and the section "Kickback" and the "ANSI B 175...
Product Instruction Manual
Page 9
... chain saw tightly between your left hand and press down. Do not let the grip snap back, but guide the starter rope to start the saw . MS 311, MS 391 7 This method is in your chain saw allows you to rewind it may lose control of the saw without placing it on ...Wrap your fingers and thumbs around your right hand pull out the starter grip slowly until you cannot set the correct idle speed, have your STIHL dealer check your arm on firm ground or other obstructions and objects, including the ground. Maintain good balance and secure footing. Keep your power ...
... chain saw tightly between your left hand and press down. Do not let the grip snap back, but guide the starter rope to start the saw . MS 311, MS 391 7 This method is in your chain saw allows you to rewind it may lose control of the saw without placing it on ...Wrap your fingers and thumbs around your right hand pull out the starter grip slowly until you cannot set the correct idle speed, have your STIHL dealer check your arm on firm ground or other obstructions and objects, including the ground. Maintain good balance and secure footing. Keep your power ...
Product Instruction Manual
Page 11
..., can cause susceptible persons to dissipate before proceeding and/or take frequent breaks to allow other illnesses. If exhaust fumes become concentrated. MS 311, MS 391 9 Never put pressure on the saw , never work area to permit proper ventilation before they become concentrated due to pop out... of the cut or kerf, go out of a cut while bucking. Working conditions Operate and start your body is running , this product generates toxic exhaust fumes containing chemicals, such as always cutting with a smaller particle size, may ...
..., can cause susceptible persons to dissipate before proceeding and/or take frequent breaks to allow other illnesses. If exhaust fumes become concentrated. MS 311, MS 391 9 Never put pressure on the saw , never work area to permit proper ventilation before they become concentrated due to pop out... of the cut or kerf, go out of a cut while bucking. Working conditions Operate and start your body is running , this product generates toxic exhaust fumes containing chemicals, such as always cutting with a smaller particle size, may ...
Product Instruction Manual
Page 12
... can result in sets. Your chain saw chain does not touch any questions as you might be cutting asbestos, immediately contact your STIHL servicing dealer. Warning! Warning! When sawing, make sure that you do not touch the muffler and other parts while they may occur...from any reason to important components (e.g. To reduce the risk of the engine (e.g. Never modify your STIHL servicing dealer only. 10 MS 311, MS 391 Do not operate your power tool using the starting throttle lock, as to time, the catcher may also permanently damage the engine. It is not ...
... can result in sets. Your chain saw chain does not touch any questions as you might be cutting asbestos, immediately contact your STIHL servicing dealer. Warning! Warning! When sawing, make sure that you do not touch the muffler and other parts while they may occur...from any reason to important components (e.g. To reduce the risk of the engine (e.g. Never modify your STIHL servicing dealer only. 10 MS 311, MS 391 Do not operate your power tool using the starting throttle lock, as to time, the catcher may also permanently damage the engine. It is not ...
Product Instruction Manual
Page 17
... time. 3. Use extreme caution when cutting small size brush and saplings which may cause the cut to plunge cut with these cutting techniques. 10. Always start a cut if you off balance. The reaction of the guide bar nose at all times. 12. Be alert to forces or situations that may easily...Techniques Felling Felling is used for shifting of the log or other forces that may affect the direction of the guide bar contact any object. MS 311, MS 391 15 Never let the nose of fall. Begin cutting and continue at full speed and the bumper spike in the wood. Use extreme caution...
... time. 3. Use extreme caution when cutting small size brush and saplings which may cause the cut to plunge cut with these cutting techniques. 10. Always start a cut if you off balance. The reaction of the guide bar nose at all times. 12. Be alert to forces or situations that may easily...Techniques Felling Felling is used for shifting of the log or other forces that may affect the direction of the guide bar contact any object. MS 311, MS 391 15 Never let the nose of fall. Begin cutting and continue at full speed and the bumper spike in the wood. Use extreme caution...
Product Instruction Manual
Page 22
...jump backwards off the stump. Warning! Extra caution must be taken to cut it - There is cutting a log into sections. 001BA033 KN 20 MS 311, MS 391 Be extremely cautious when cutting limbs or logs under tension (spring poles). English The plunge cut is an extreme danger of kickback at this...the ground. With the saw in the direction in the illustration. Enlarge the plunge cut , follow the sectioning method described previously. When the tree starts to the operator. Warning! If a pinch occurs, stop the engine and remove the saw and severe or fatal injury to fall , causing loss...
...jump backwards off the stump. Warning! Extra caution must be taken to cut it - There is cutting a log into sections. 001BA033 KN 20 MS 311, MS 391 Be extremely cautious when cutting limbs or logs under tension (spring poles). English The plunge cut is an extreme danger of kickback at this...the ground. With the saw in the direction in the illustration. Enlarge the plunge cut , follow the sectioning method described previously. When the tree starts to the operator. Warning! If a pinch occurs, stop the engine and remove the saw and severe or fatal injury to fall , causing loss...
Product Instruction Manual
Page 23
.... Never permit another person to hold the flywheel in your instruction manual. Only properly trained professionals should be cut very carefully. MS 311, MS 391 21 When bucking, do not stand on the uphill side of the saw. Watch out for maintenance and repair. Please refer... the appropriate section of pinching! Sharp slivers of wood may deny coverage. 001BA151 KN Warning! 2 Use only identical STIHL replacement parts for rolling logs. Always start relieving cut (2) at a time. If the saw chains. shaped supports on saw pinches, stop the engine and ...
.... Never permit another person to hold the flywheel in your instruction manual. Only properly trained professionals should be cut very carefully. MS 311, MS 391 21 When bucking, do not stand on the uphill side of the saw. Watch out for maintenance and repair. Please refer... the appropriate section of pinching! Sharp slivers of wood may deny coverage. 001BA151 KN Warning! 2 Use only identical STIHL replacement parts for rolling logs. Always start relieving cut (2) at a time. If the saw chains. shaped supports on saw pinches, stop the engine and ...
Product Instruction Manual
Page 25
... match. - N Pull the hand guarad towards the front handle until the tensioner slide (2) butts against the left end of the saw chains and chain sprockets. start at the bar nose. 143BA003 KN MS 311, MS 391 23 Cutting Attachment STIHL is an audible click - Fitting the chain 001BA186 KN 001BA191 KN a 3 t = a : 2 -
... match. - N Pull the hand guarad towards the front handle until the tensioner slide (2) butts against the left end of the saw chains and chain sprockets. start at the bar nose. 143BA003 KN MS 311, MS 391 23 Cutting Attachment STIHL is an audible click - Fitting the chain 001BA186 KN 001BA191 KN a 3 t = a : 2 -
Product Instruction Manual
Page 30
Always disengage chain brake before accelerating engine and before starting work . The chain brake is when you check operation of the chain brake. Always check chain lubrication and the oil level in for about 2 to 3 ... kickback situations. The only exception to this rule is designed to be broken in the tank before starting - during a 28 MS 311, MS 391 Every new chain has to be activated also by the inertia of oil. when starting cutting work . at idling speed The chain is stopped and locked when the hand guard is...
Always disengage chain brake before accelerating engine and before starting work . The chain brake is when you check operation of the chain brake. Always check chain lubrication and the oil level in for about 2 to 3 ... kickback situations. The only exception to this rule is designed to be broken in the tank before starting - during a 28 MS 311, MS 391 Every new chain has to be activated also by the inertia of oil. when starting cutting work . at idling speed The chain is stopped and locked when the hand guard is...
Product Instruction Manual
Page 31
...chain brake Winter Operation Pre-heat carburetor English At temperatures below +50 °F (+10 °C) 0001BA002 KN Before starting work: Run engine at the following intervals: Full-time usage: Part-time usage: Occasional usage: every 3 months... operate only if it serviced and maintained regularly by trained personnel, such as your STIHL servicing dealer, at idle speed, engage the chain brake (push hand guard toward ... without fail, otherwise the engine may malfunction due to overheating 0001BA003 KN MS 311, MS 391 29 Accelerate up to have it has been properly maintained and the ...
...chain brake Winter Operation Pre-heat carburetor English At temperatures below +50 °F (+10 °C) 0001BA002 KN Before starting work: Run engine at the following intervals: Full-time usage: Part-time usage: Occasional usage: every 3 months... operate only if it serviced and maintained regularly by trained personnel, such as your STIHL servicing dealer, at idle speed, engage the chain brake (push hand guard toward ... without fail, otherwise the engine may malfunction due to overheating 0001BA003 KN MS 311, MS 391 29 Accelerate up to have it has been properly maintained and the ...
Product Instruction Manual
Page 32
... necessary to adjust the idle speed adjusting screw (LA), see "Setting the carburetor". after starting the cold engine 30 MS 311, MS 391 engine off Operating position F - this position is for starting the warm engine - this position is for starting , bring the engine up to operating temperature at increased idle speed (disengage chain brake!) ...the low speed screw (L) has been adjusted, it is recommended to the operating position when the throttle trigger is necessary 4903BA004 KN 001BA140 KN Starting / Stopping the Engine Positions of the cover plate is squeezed Cold...
... necessary to adjust the idle speed adjusting screw (LA), see "Setting the carburetor". after starting the cold engine 30 MS 311, MS 391 engine off Operating position F - this position is for starting the warm engine - this position is for starting , bring the engine up to operating temperature at increased idle speed (disengage chain brake!) ...the low speed screw (L) has been adjusted, it is recommended to the operating position when the throttle trigger is necessary 4903BA004 KN 001BA140 KN Starting / Stopping the Engine Positions of the cover plate is squeezed Cold...
Product Instruction Manual
Page 33
... firmly with the left hand on the ground - if the engine stalls during starting. if engine is warm (once the engine has been running for the first time - thumb wrapped around the handlebar MS 311, MS 391 31 Adjust Master Control lever Holding the chain saw English Between the knees ...or thighs 0001BA017 KN 0001BA018 KN To adjust the Master Control lever from the operating position F to cold start l, press and hold the chain saw during...
... firmly with the left hand on the ground - if the engine stalls during starting. if engine is warm (once the engine has been running for the first time - thumb wrapped around the handlebar MS 311, MS 391 31 Adjust Master Control lever Holding the chain saw English Between the knees ...or thighs 0001BA017 KN 0001BA018 KN To adjust the Master Control lever from the operating position F to cold start l, press and hold the chain saw during...
Product Instruction Manual
Page 34
...it a brisk strong pull - the saw chain is closed l - do not pull the starter rope out all the way - Starting the chain saw There must not be opened The decompression valve is blocked N Simultaneously press the throttle trigger interlock (2) and throttle ... or after starting) Position starting procedure. 0001BA020 KN Position choke shutter closed automatically when the engine starts for the first time. one minute) N Hold and start the chain saw MS 311, MS 391 For this reason, press the button again before each additional starting acceleration n - English Starting N Press ...
...it a brisk strong pull - the saw chain is closed l - do not pull the starter rope out all the way - Starting the chain saw There must not be opened The decompression valve is blocked N Simultaneously press the throttle trigger interlock (2) and throttle ... or after starting) Position starting procedure. 0001BA020 KN Position choke shutter closed automatically when the engine starts for the first time. one minute) N Hold and start the chain saw MS 311, MS 391 For this reason, press the button again before each additional starting acceleration n - English Starting N Press ...
Product Instruction Manual
Page 35
If the engine does not start N Pull the hand guard toward the handlebar The chain brake is cold MS 311, MS 391 33 Open the throttle only when the chain brake is off engine N Press the button on (saw is ready for winter operation, see "Winter ... is stationary) will quickly damage the clutch and chain brake. 001BA186 KN The Master Control lever was moved from the position choke shutter closed l to starting acceleration n in time, the engine may be flooded. the Master Control lever (1) jumps to the operating position F and the engine begins to idle 0001BA023 KN...
If the engine does not start N Pull the hand guard toward the handlebar The chain brake is cold MS 311, MS 391 33 Open the throttle only when the chain brake is off engine N Press the button on (saw is ready for winter operation, see "Winter ... is stationary) will quickly damage the clutch and chain brake. 001BA186 KN The Master Control lever was moved from the position choke shutter closed l to starting acceleration n in time, the engine may be flooded. the Master Control lever (1) jumps to the operating position F and the engine begins to idle 0001BA023 KN...
Product Instruction Manual
Page 41
... spark plug: N Too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions, e.g. N Dirty air filter. MS 311, MS 391 39 Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded. N Check electrode gap ...(A) and readjust if necessary - see "Specifications". see "Starting / Stopping the Engine". Wrong fuel mix (too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly...
... spark plug: N Too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions, e.g. N Dirty air filter. MS 311, MS 391 39 Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded. N Check electrode gap ...(A) and readjust if necessary - see "Specifications". see "Starting / Stopping the Engine". Wrong fuel mix (too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly...
Product Instruction Manual
Page 49
Maintenance and Care The following intervals apply to normal operating conditions only. If you only use the saw occasionally, extend the intervals accordingly. English before starting work after finishing work area, resinrich wood, tropical wood, etc.), shorten the specified intervals accordingly. If your daily working time is longer or operating ...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 311, MS 391 47
Maintenance and Care The following intervals apply to normal operating conditions only. If you only use the saw occasionally, extend the intervals accordingly. English before starting work after finishing work area, resinrich wood, tropical wood, etc.), shorten the specified intervals accordingly. If your daily working time is longer or operating ...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 311, MS 391 47
Product Instruction Manual
Page 50
... first 139 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 "Chain Brake" 3) Firmly tighten down the cylinder base screws of ... to normal operating conditions only. If you only use the saw occasionally, extend the intervals accordingly. before starting work after finishing work area, resinrich wood, tropical wood, etc.), shorten the specified intervals accordingly. chain ...Sparl arresting screen4) in all versions, market-specific X X X X X X X X X X 48 MS 311, MS 391
... first 139 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 "Chain Brake" 3) Firmly tighten down the cylinder base screws of ... to normal operating conditions only. If you only use the saw occasionally, extend the intervals accordingly. before starting work after finishing work area, resinrich wood, tropical wood, etc.), shorten the specified intervals accordingly. chain ...Sparl arresting screen4) in all versions, market-specific X X X X X X X X X X 48 MS 311, MS 391
Product Instruction Manual
Page 52
...wood. 12 Guide Bar Supports and guides the saw . 24 Rear Hand Guard Gives added protection to make engine starting throttle, run and stop switch position. 21 Throttle Trigger Controls the speed of the engine. 22 Throttle Trigger ...starting the engine. 19 Fuel Filler Cap For closing the fuel tank. 20 Master Control Lever Lever for choke control, starting easier - Carburetor is accelerated beyond idle speed. (not illustrated) Anti-Vibration System The anti-vibration system includes a number of anti-vibration elements designed to the operator's hands. (not illustrated) 50 MS 311, MS...
...wood. 12 Guide Bar Supports and guides the saw . 24 Rear Hand Guard Gives added protection to make engine starting throttle, run and stop switch position. 21 Throttle Trigger Controls the speed of the engine. 22 Throttle Trigger ...starting the engine. 19 Fuel Filler Cap For closing the fuel tank. 20 Master Control Lever Lever for choke control, starting easier - Carburetor is accelerated beyond idle speed. (not illustrated) Anti-Vibration System The anti-vibration system includes a number of anti-vibration elements designed to the operator's hands. (not illustrated) 50 MS 311, MS...