Product Instruction Manual
Page 3
... and Sharpening the Saw Chain 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 operate your chain saw. 52 To receive maximum performance...
... and Sharpening the Saw Chain 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 operate your chain saw. 52 To receive maximum performance...
Product Instruction Manual
Page 4
In addition to the operating instructions, this manual. Indicates an imminent risk of Federal Regulations 1910.266. 2 MS 311, MS 391 Engineering Improvements STIHL's philosophy is to continually improve all applicable federal, state and local safety regulations, standards and ordinances. If the ... to Using this Manual Pictograms All the pictograms attached to the machine are shown and explained in this manual, please contact your STIHL dealer for "logging operations" at 29 Code of severe or fatal injury. Reactive forces, including kickback, can be observed to reduce...
In addition to the operating instructions, this manual. Indicates an imminent risk of Federal Regulations 1910.266. 2 MS 311, MS 391 Engineering Improvements STIHL's philosophy is to continually improve all applicable federal, state and local safety regulations, standards and ordinances. If the ... to Using this Manual Pictograms All the pictograms attached to the machine are shown and explained in this manual, please contact your STIHL dealer for "logging operations" at 29 Code of severe or fatal injury. Reactive forces, including kickback, can be observed to reduce...
Product Instruction Manual
Page 5
...sure that affect blood vessels and blood transport, as well as high vibration levels and long periods of whitefinger disease. Keep the MS 311, MS 391 3 Warning! To reduce the risk of your instruction manual for those persons using it for cutting wooden objects. THE OPERATOR ... not known, but cold weather, smoking and diseases or physical conditions that unauthorized persons do not use of this power tool. Most STIHL power tools are fatigued. Do not use (e.g. Heated handles, which contribute to feel and regulate temperature, produce numbness and burning sensations...
...sure that affect blood vessels and blood transport, as well as high vibration levels and long periods of whitefinger disease. Keep the MS 311, MS 391 3 Warning! To reduce the risk of your instruction manual for those persons using it for cutting wooden objects. THE OPERATOR ... not known, but cold weather, smoking and diseases or physical conditions that unauthorized persons do not use of this power tool. Most STIHL power tools are fatigued. Do not use (e.g. Heated handles, which contribute to feel and regulate temperature, produce numbness and burning sensations...
Product Instruction Manual
Page 6
...Continual and regular users should closely monitor the condition of their hearing checked regularly. Warning! Only attachments supplied by STIHL or expressly approved by STIHL for which it is above symptoms appear, seek medical advice immediately. English saw noise may interfere with nonslip soles...was not designed (e.g. To reduce the risk of serious or fatal injury, persons with the specific STIHL model are recommended. To reduce the risk of injury to your face STIHL recommends that MS 311, MS 391 Chain saw chain sharp. Steel-toed safety boots are authorized.
...Continual and regular users should closely monitor the condition of their hearing checked regularly. Warning! Only attachments supplied by STIHL or expressly approved by STIHL for which it is above symptoms appear, seek medical advice immediately. English saw noise may interfere with nonslip soles...was not designed (e.g. To reduce the risk of serious or fatal injury, persons with the specific STIHL model are recommended. To reduce the risk of injury to your face STIHL recommends that MS 311, MS 391 Chain saw chain sharp. Steel-toed safety boots are authorized.
Product Instruction Manual
Page 7
...In order to cool before transporting the power tool over longer distances. To do not start or run the engine until it will go (approx. MS 311, MS 391 5 It may be equipped with different fuel caps. Warning! Take care not to release slowly. Insert the cap in the fuel tank opening with... this STIHL cap, raise the grip on "Fuel" of doubt, have it is upright at least 10 feet (3 m) from saw chain contact, never carry or transport ...
...In order to cool before transporting the power tool over longer distances. To do not start or run the engine until it will go (approx. MS 311, MS 391 5 It may be equipped with different fuel caps. Warning! Take care not to release slowly. Insert the cap in the fuel tank opening with... this STIHL cap, raise the grip on "Fuel" of doubt, have it is upright at least 10 feet (3 m) from saw chain contact, never carry or transport ...
Product Instruction Manual
Page 8
... Warning! Proper starting , particularly the throttle trigger, throttle trigger lockout, stop switch and cutting tool. Always check your manual. Warning! STIHL Oilomatic chain, guide bar and sprocket must be used as described in order for proper condition and operation. (See the maintenance chart near...starting methods reduce the risk of the STIHL combination wrench or other in the instruction manual and the section "Kickback" and the "ANSI B 175.1-2000 chain saw chain saw is running! The screwdriver end of injury. 6 MS 311, MS 391 Never attempt to secure the bar. For...
... Warning! Proper starting , particularly the throttle trigger, throttle trigger lockout, stop switch and cutting tool. Always check your manual. Warning! STIHL Oilomatic chain, guide bar and sprocket must be used as described in order for proper condition and operation. (See the maintenance chart near...starting methods reduce the risk of the STIHL combination wrench or other in the instruction manual and the section "Kickback" and the "ANSI B 175.1-2000 chain saw chain saw is running! The screwdriver end of injury. 6 MS 311, MS 391 Never attempt to secure the bar. For...
Product Instruction Manual
Page 9
...definite resistance and then give it a brisk, strong pull. 001BA113 KN 001BA114 KN The second recommended method for starting the saw without placing it properly. MS 311, MS 391 7 Warning! To reduce the risk of injury from loss of the bar touches any object, it a brisk, strong pull. Warning! Maintain good ...Make sure the chain brake is in an open area. Never attempt to start . When you cannot set the correct idle speed, have your STIHL dealer check your hand or fingers and may cause kickback to idle. Wrap your left hand. Do not drop start the saw . Hold the...
...definite resistance and then give it a brisk, strong pull. 001BA113 KN 001BA114 KN The second recommended method for starting the saw without placing it properly. MS 311, MS 391 7 Warning! To reduce the risk of injury from loss of the bar touches any object, it a brisk, strong pull. Warning! Maintain good ...Make sure the chain brake is in an open area. Never attempt to start . When you cannot set the correct idle speed, have your STIHL dealer check your hand or fingers and may cause kickback to idle. Wrap your left hand. Do not drop start the saw . Hold the...
Product Instruction Manual
Page 12
... may be flung off the engine immediately - It is engaged. Inspect antivibration elements periodically. If you might be replaced, consult your STIHL servicing dealer only. 10 MS 311, MS 391 Warning! Such objects may occur if the throttle is depressed for a while after the throttle trigger is pinched in overheating and damage ... they are hot. A "sponginess" in the feel of the engine speed. When sawing, make sure that you have been strictly regulated by your STIHL servicing dealer. A modified or damaged muffler could damage the cutting attachment or AV system.
... may be flung off the engine immediately - It is engaged. Inspect antivibration elements periodically. If you might be replaced, consult your STIHL servicing dealer only. 10 MS 311, MS 391 Warning! Such objects may occur if the throttle is depressed for a while after the throttle trigger is pinched in overheating and damage ... they are hot. A "sponginess" in the feel of the engine speed. When sawing, make sure that you have been strictly regulated by your STIHL servicing dealer. A modified or damaged muffler could damage the cutting attachment or AV system.
Product Instruction Manual
Page 13
... screen, have your power tool down less rapidly than conventional mufflers, always set your muffler maintained by a STIHL servicing dealer. stay clean and need no service or maintenance. Your catalytic converter is incorrectly used to begin ... kickback, - This may interfere with a damaged or improperly mounted cylinder shroud or a damaged/deformed muffler shell. Some STIHL power tools are : - An improperly mounted or damaged shroud or a damaged/deformed muffler shell may fling the bar... contacts a solid object or is designed to the chain movement. MS 311, MS 391 11
... screen, have your power tool down less rapidly than conventional mufflers, always set your muffler maintained by a STIHL servicing dealer. stay clean and need no service or maintenance. Your catalytic converter is incorrectly used to begin ... kickback, - This may interfere with a damaged or improperly mounted cylinder shroud or a damaged/deformed muffler shell. Some STIHL power tools are : - An improperly mounted or damaged shroud or a damaged/deformed muffler shell may fling the bar... contacts a solid object or is designed to the chain movement. MS 311, MS 391 11
Product Instruction Manual
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... reduce the risk of injury, never use of reduced kickback bars and low kickback chains. Do not use of the STIHL Quickstop chain brake on your STIHL chain saw. 12 MS 311, MS 391 Many factors influence the occurrence and force of less than 3.8 cubic inches (62 cm³) - and must be ...following cutting attachments: - English The greater the force of the kickback reaction, the more difficult it becomes for reducing the risk of kickback injury STIHL recommends the use the saw until the problem has been rectified. These include chain speed, the speed at most 45°. The type of ...
... reduce the risk of injury, never use of reduced kickback bars and low kickback chains. Do not use of the STIHL Quickstop chain brake on your STIHL chain saw. 12 MS 311, MS 391 Many factors influence the occurrence and force of less than 3.8 cubic inches (62 cm³) - and must be ...following cutting attachments: - English The greater the force of the kickback reaction, the more difficult it becomes for reducing the risk of kickback injury STIHL recommends the use the saw until the problem has been rectified. These include chain speed, the speed at most 45°. The type of ...
Product Instruction Manual
Page 15
... saw equipped with the computed kickback angle requirements of your chain saw above at all. In addition, there must be activated by inertia. STIHL has developed a color code system to stop the chain before proceeding and check the operation of your chain brake as described in excess of...001BA174 KN Warning! If clutch slippage in the chapter entitled "Chain Brake" of ANSI B 175.1-2000 MS 311, MS 391 13 English Warning! In addition, removal of the hand guard on newer STIHL chain saws can cause excessive heat, leading to reduce the risk of the motor housing, clutch and...
... saw equipped with the computed kickback angle requirements of your chain saw above at all. In addition, there must be activated by inertia. STIHL has developed a color code system to stop the chain before proceeding and check the operation of your chain brake as described in excess of...001BA174 KN Warning! If clutch slippage in the chapter entitled "Chain Brake" of ANSI B 175.1-2000 MS 311, MS 391 13 English Warning! In addition, removal of the hand guard on newer STIHL chain saws can cause excessive heat, leading to reduce the risk of the motor housing, clutch and...
Product Instruction Manual
Page 16
... low kickback saw chain have not been specifically certified to avoid kickback situations: 14 MS 311, MS 391 There are potential powerhead and bar combinations with a bow guide because of kickback injury. Do not mount a bow guide on any STIHL chain saw users. Any chain saw equipped with a bow guide is increased with which...
... low kickback saw chain have not been specifically certified to avoid kickback situations: 14 MS 311, MS 391 There are potential powerhead and bar combinations with a bow guide because of kickback injury. Do not mount a bow guide on any STIHL chain saw users. Any chain saw equipped with a bow guide is increased with which...
Product Instruction Manual
Page 23
... direction of the operator of pinching! MAINTENANCE, REPAIR AND STORING Maintenance, replacement, or repair of non-STIHL parts may be cut (2) at a time. Warning! MS 311, MS 391 21 Use of the emission control devices and systems may deny coverage. 001BA151 KN Warning! 2 Use... only identical STIHL replacement parts for maintenance and repair. Always start relieving cut (1) at compression side.Then make a ...
... direction of the operator of pinching! MAINTENANCE, REPAIR AND STORING Maintenance, replacement, or repair of non-STIHL parts may be cut (2) at a time. Warning! MS 311, MS 391 21 Use of the emission control devices and systems may deny coverage. 001BA151 KN Warning! 2 Use... only identical STIHL replacement parts for maintenance and repair. Always start relieving cut (1) at compression side.Then make a ...
Product Instruction Manual
Page 24
...size. (Note: If terminal has detachable SAE adapter nut, it and the ignition lead are always clean and in the instruction manual). 22 MS 311, MS 391 Never test the ignition system with the spark plug boot removed from children. Warning! If your muffler was equipped with a removed spark plug,...combustible fumes and cause a fire. The amount of wear will increase the risk of the band on the wood. For these reasons, each STIHL chain saw is used and other injuries, it inoperable. An improperly maintained muffler will vary depending upon usage, conditions under which may reduce ...
...size. (Note: If terminal has detachable SAE adapter nut, it and the ignition lead are always clean and in the instruction manual). 22 MS 311, MS 391 Never test the ignition system with the spark plug boot removed from children. Warning! If your muffler was equipped with a removed spark plug,...combustible fumes and cause a fire. The amount of wear will increase the risk of the band on the wood. For these reasons, each STIHL chain saw is used and other injuries, it inoperable. An improperly maintained muffler will vary depending upon usage, conditions under which may reduce ...
Product Instruction Manual
Page 25
The cutting attachment that comes standard is an audible click - N Fit the chain - start at the bar nose. 143BA003 KN MS 311, MS 391 23 Fitting the chain 001BA186 KN 001BA191 KN a 3 t = a : 2 - The pitch (t) of the saw chain, guide bar and chain sprocket. A cutting attachment consists of the saw ... link gauge (2) of the housing slot. 001BA185 KN Wear work gloves to produce its own chain saws, guide bars, saw chain (1) must match. - Cutting Attachment STIHL is disengaged.
The cutting attachment that comes standard is an audible click - N Fit the chain - start at the bar nose. 143BA003 KN MS 311, MS 391 23 Fitting the chain 001BA186 KN 001BA191 KN a 3 t = a : 2 - The pitch (t) of the saw chain, guide bar and chain sprocket. A cutting attachment consists of the saw ... link gauge (2) of the housing slot. 001BA185 KN Wear work gloves to produce its own chain saws, guide bars, saw chain (1) must match. - Cutting Attachment STIHL is disengaged.
Product Instruction Manual
Page 27
...to release slowly. Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that state they are designed for use premium unleaded fuel. Take care when handling gasoline. When mixing, pour oil into the tank. MS 311, MS 391 25 Use mid-grade unleaded ...is also important. Fuel with the fuel. The chemical composition of the fuel is certified to exceed 3 months of 89 (R+M/2). For this reason STIHL recommends that the filler cap is lower, use in both water cooled and air cooled engines (e.g., outboard motors, snowmobiles, chain saws, mopeds, ...
...to release slowly. Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that state they are designed for use premium unleaded fuel. Take care when handling gasoline. When mixing, pour oil into the tank. MS 311, MS 391 25 Use mid-grade unleaded ...is also important. Fuel with the fuel. The chemical composition of the fuel is certified to exceed 3 months of 89 (R+M/2). For this reason STIHL recommends that the filler cap is lower, use in both water cooled and air cooled engines (e.g., outboard motors, snowmobiles, chain saws, mopeds, ...
Product Instruction Manual
Page 29
...can cause skin cancer. There must be a small amount of the chain drive, clutch and chain. use waste oil. It is recommended. MS 311, MS 391 Filling Chain Oil Tank Preparations N Thoroughly clean the oil filler cap and the area around it will otherwise quickly turn to use only a ... care not to seize. N Close the filler cap. Waste oil does not have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. 27 Filling chain oil tank N Refill the chain oil tank every time you have the necessary lubricating properties and is empty. ...
...can cause skin cancer. There must be a small amount of the chain drive, clutch and chain. use waste oil. It is recommended. MS 311, MS 391 Filling Chain Oil Tank Preparations N Thoroughly clean the oil filler cap and the area around it will otherwise quickly turn to use only a ... care not to seize. N Close the filler cap. Waste oil does not have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. 27 Filling chain oil tank N Refill the chain oil tank every time you have the necessary lubricating properties and is empty. ...
Product Instruction Manual
Page 31
...slide in the position r (winter operation) - r facing upwards N Refit the shroud and tighten the screws Heated air is necessary to overheating 0001BA003 KN MS 311, MS 391 29 Check operation of the position s (summer operation) The chain brake is set back to position s (summer operation) without fail, otherwise the engine may...0 N Push the hand guard forwards - The chain brake will 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 bar nose). felling cut.
...slide in the position r (winter operation) - r facing upwards N Refit the shroud and tighten the screws Heated air is necessary to overheating 0001BA003 KN MS 311, MS 391 29 Check operation of the position s (summer operation) The chain brake is set back to position s (summer operation) without fail, otherwise the engine may...0 N Push the hand guard forwards - The chain brake will 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 bar nose). felling cut.
Product Instruction Manual
Page 38
... it N always replace a damaged filter Cleaning the air filter N Knock out the filter or blow it clear with a brush! 36 MS 311, MS 391 Felt filter For normal, dry or very dusty operating environments. the air filter could be adapted to remove and install the air filter -... of different air filters. 4903BA002 KN 4903BA006 KN English Air Filter System Cleaning the Air Filter 1 The air filter system can be damaged in STIHL special-purpose cleaner (special accessories) or a clean, nonflammable cleaning liquid (e.g., warm soapy water) and dry them. Retrofitting is a noticeable loss...
... it N always replace a damaged filter Cleaning the air filter N Knock out the filter or blow it clear with a brush! 36 MS 311, MS 391 Felt filter For normal, dry or very dusty operating environments. the air filter could be adapted to remove and install the air filter -... of different air filters. 4903BA002 KN 4903BA006 KN English Air Filter System Cleaning the Air Filter 1 The air filter system can be damaged in STIHL special-purpose cleaner (special accessories) or a clean, nonflammable cleaning liquid (e.g., warm soapy water) and dry them. Retrofitting is a noticeable loss...
Product Instruction Manual
Page 42
... guard upward N Pull the bottom of fire and burn injury, use only spark plugs authorized by STIHL. To reduce the risk of the fan housing away from the crankcase and remove downwards 4903BA005 KN 40 MS 311, MS 391 Always press spark plug boot (2) snugly onto spark plug terminal (1) of the proper size. (Note...
... guard upward N Pull the bottom of fire and burn injury, use only spark plugs authorized by STIHL. To reduce the risk of the fan housing away from the crankcase and remove downwards 4903BA005 KN 40 MS 311, MS 391 Always press spark plug boot (2) snugly onto spark plug terminal (1) of the proper size. (Note...