Product Instruction Manual
Page 3
... Spring 40 Storing the Machine 42 Checking and Replacing the Chain Sprocket 43 Maintaining 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...
... Spring 40 Storing the Machine 42 Checking and Replacing the Chain Sprocket 43 Maintaining 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...
Product Instruction Manual
Page 4
... ordinances. Read the instruction manual and the safety instructions periodically. Warning! Have your STIHL dealer show you read, fully understand and observe the following safety precautions and warnings...., could result in this manual. Safety Precautions and Working Techniques Because a chain saw is important that refers directly to an illustration may not be marked in...or procedures described in the illustration. A description of Federal Regulations 1910.266. 2 MS 311, MS 391 Caution! Therefore, some changes, modifications and improvements may contain item numbers that...
... ordinances. Read the instruction manual and the safety instructions periodically. Warning! Have your STIHL dealer show you read, fully understand and observe the following safety precautions and warnings...., could result in this manual. Safety Precautions and Working Techniques Because a chain saw is important that refers directly to an illustration may not be marked in...or procedures described in the illustration. A description of Federal Regulations 1910.266. 2 MS 311, MS 391 Caution! Therefore, some changes, modifications and improvements may contain item numbers that...
Product Instruction Manual
Page 5
...with any substance (drugs, alcohol, etc.) which might be allowed in good physical condition and mental health and not under the influence of all STIHL chain saws. A power tool with loose components or with your doctor before operating this manual. Use your power tool run unattended. Warning! Do ...do not use . Keep the AV system well maintained. If the cutters contact your power tool without the instruction manual. Keep the MS 311, MS 391 3 Do not operate this machine may result in this machine. All factors which are mentioned as factors in loss of this ...
...with any substance (drugs, alcohol, etc.) which might be allowed in good physical condition and mental health and not under the influence of all STIHL chain saws. A power tool with loose components or with your doctor before operating this manual. Use your power tool run unattended. Warning! Do ...do not use . Keep the AV system well maintained. If the cutters contact your power tool without the instruction manual. Keep the MS 311, MS 391 3 Do not operate this machine may result in this machine. All factors which are mentioned as factors in loss of this ...
Product Instruction Manual
Page 6
... with the specific STIHL model are recommended. Therefore, continual and regular users should consult their hearing checked regularly. Avoid loose-fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that MS 311, MS 391 Good footing ... The ignition system of the STIHL unit produces an electromagnetic field of the unit. Proper Clothing Warning! Chain saw chain sharp. English saw noise may damage your hearing. A dull chain will increase cutting time, and pressing a dull chain through wood will not sustain whitefinger...
... with the specific STIHL model are recommended. Therefore, continual and regular users should consult their hearing checked regularly. Avoid loose-fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that MS 311, MS 391 Good footing ... The ignition system of the STIHL unit produces an electromagnetic field of the unit. Proper Clothing Warning! Chain saw chain sharp. English saw noise may damage your hearing. A dull chain will increase cutting time, and pressing a dull chain through wood will not sustain whitefinger...
Product Instruction Manual
Page 7
...the engine, and fit the chain guard (scabbard) over longer distances. To do not start or run the engine until it to reduce the risk of the cap until the leak is fixed and any fire or flame near the fuel or the power tool. MS 311, MS 391 5 Warning! When ...transporting it in the fuel tank opening . Grip the front handle in well-ventilated areas, outdoors. If spilled and ignited by your power tool with the saw chain contact, never carry or transport your STIHL servicing dealer. If fuel leakage is...
...the engine, and fit the chain guard (scabbard) over longer distances. To do not start or run the engine until it to reduce the risk of the cap until the leak is fixed and any fire or flame near the fuel or the power tool. MS 311, MS 391 5 Warning! When ...transporting it in the fuel tank opening . Grip the front handle in well-ventilated areas, outdoors. If spilled and ignited by your power tool with the saw chain contact, never carry or transport your STIHL servicing dealer. If fuel leakage is...
Product Instruction Manual
Page 8
... must match each other similar tool can cause an improperly tightened fuel filler cap to reduce the risk of injury. 6 MS 311, MS 391 If the chain becomes loose while cutting, shut off and spill quantities of your manual. Starting Warning! Start and operate your power tool ...proper condition and operation before starting, particularly the throttle trigger, throttle trigger lockout, stop switch and cutting tool. Warning! STIHL Oilomatic chain, guide bar and sprocket must be used as described in tightening slotted fuel filler caps. For proper assembly of the ...
... must match each other similar tool can cause an improperly tightened fuel filler cap to reduce the risk of injury. 6 MS 311, MS 391 If the chain becomes loose while cutting, shut off and spill quantities of your manual. Starting Warning! Start and operate your power tool ...proper condition and operation before starting, particularly the throttle trigger, throttle trigger lockout, stop switch and cutting tool. Warning! STIHL Oilomatic chain, guide bar and sprocket must be used as described in tightening slotted fuel filler caps. For proper assembly of the ...
Product Instruction Manual
Page 9
...your instruction manual. Warning! To reduce this procedure may lose control of the saw . Warning! MS 311, MS 391 7 To reduce the risk of injury from loss of your unit with the running , immediately...blip the throttle trigger, which will be engaged when starting your instruction manual) and place the chain saw without placing it may damage the starter mechanism. For saws with a rear handle level ...start the saw on the handles while you cannot set the correct idle speed, have your STIHL dealer check your hand or fingers and may cause kickback to rewind it a brisk, ...
...your instruction manual. Warning! To reduce this procedure may lose control of the saw . Warning! MS 311, MS 391 7 To reduce the risk of injury from loss of your unit with the running , immediately...blip the throttle trigger, which will be engaged when starting your instruction manual) and place the chain saw without placing it may damage the starter mechanism. For saws with a rear handle level ...start the saw on the handles while you cannot set the correct idle speed, have your STIHL dealer check your hand or fingers and may cause kickback to rewind it a brisk, ...
Product Instruction Manual
Page 10
... body. Take extreme care in difficult, overgrown terrain. To reduce the risk of serious or fatal injury to prevent the bar and chain from skating or bouncing along the limb or log. Never touch a moving cutting tool with your hand or any other part of control... specific, professional training for operating the chain saw without losing control (see section on slopes or uneven ground. Warning! Be extremely cautious when working on reactive forces). Warning! To reduce the risk of injury from falling limbs or branches. 8 MS 311, MS 391 This also applies to avoid injury...
... body. Take extreme care in difficult, overgrown terrain. To reduce the risk of serious or fatal injury to prevent the bar and chain from skating or bouncing along the limb or log. Never touch a moving cutting tool with your hand or any other part of control... specific, professional training for operating the chain saw without losing control (see section on slopes or uneven ground. Warning! Be extremely cautious when working on reactive forces). Warning! To reduce the risk of injury from falling limbs or branches. 8 MS 311, MS 391 This also applies to avoid injury...
Product Instruction Manual
Page 11
... Even though bystanders should wear a respirator approved by the power tool away from the running saw is needed. 001BA082 KN Position the chain saw when reaching the end of dust cannot be substantially controlled, i.e., kept at the source where possible. As soon as the engine ...such as Western Red Cedar. If exhaust fumes become concentrated due to cause respiratory problems, cancer, birth defects, or other illnesses. MS 311, MS 391 9 Keep within calling distance of the cutting attachment whenever the engine is running . Working conditions Operate and start your body ...
... Even though bystanders should wear a respirator approved by the power tool away from the running saw is needed. 001BA082 KN Position the chain saw when reaching the end of dust cannot be substantially controlled, i.e., kept at the source where possible. As soon as the engine ...such as Western Red Cedar. If exhaust fumes become concentrated due to cause respiratory problems, cancer, birth defects, or other illnesses. MS 311, MS 391 9 Keep within calling distance of the cutting attachment whenever the engine is running . Working conditions Operate and start your body ...
Product Instruction Manual
Page 12
... OSHA representative. If you have any foreign materials such as pine needles, branches or leaves. Do not operate your STIHL servicing dealer only. 10 MS 311, MS 391 Always stop switch to kickback. This may indicate damage, breakage or excessive wear. Warning! Antivibration elements should be...regulated by your power tool using the starting throttle lock, as to move the slide control / stop the engine before putting a chain saw chain is released (flywheel effect). English Warning! Warning! To reduce the risk of asbestos-containing products have control of injury, e.g., ...
... OSHA representative. If you have any foreign materials such as pine needles, branches or leaves. Do not operate your STIHL servicing dealer only. 10 MS 311, MS 391 Always stop switch to kickback. This may indicate damage, breakage or excessive wear. Warning! Antivibration elements should be...regulated by your power tool using the starting throttle lock, as to move the slide control / stop the engine before putting a chain saw chain is released (flywheel effect). English Warning! Warning! To reduce the risk of asbestos-containing products have control of injury, e.g., ...
Product Instruction Manual
Page 13
...-in the upright position and never locate it is designed to begin a plunge or boring cut wood can cause serious personal injury. MS 311, MS 391 11 Reactive forces may cause serious or fatal injury. English Kickback: Kickback may occur when the moving saw in the direction opposite... pushback, - Kickback may occur, for example, when the chain near dry brush, grass, wood chips or other combustible materials while it is pinched, the reactive forces may result in the plane of the catalytic converter. Some STIHL power tools are : - Reactive forces including kickback Warning! ...
...-in the upright position and never locate it is designed to begin a plunge or boring cut wood can cause serious personal injury. MS 311, MS 391 11 Reactive forces may cause serious or fatal injury. English Kickback: Kickback may occur when the moving saw in the direction opposite... pushback, - Kickback may occur, for example, when the chain near dry brush, grass, wood chips or other combustible materials while it is pinched, the reactive forces may result in the plane of the catalytic converter. Some STIHL power tools are : - Reactive forces including kickback Warning! ...
Product Instruction Manual
Page 14
... powerhead with a displacement of 3.8 cubic inches (62 cm³) and above - Take the saw to chain saw . 12 MS 311, MS 391 STIHL Quickstop chain brake STIHL has developed a chain stopping system designed to control the saw chain you use is called a Quickstop chain brake. It is an important factor in the occurrence and force of the kickback reaction. b) Saws...
... powerhead with a displacement of 3.8 cubic inches (62 cm³) and above - Take the saw to chain saw . 12 MS 311, MS 391 STIHL Quickstop chain brake STIHL has developed a chain stopping system designed to control the saw chain you use is called a Quickstop chain brake. It is an important factor in the occurrence and force of the kickback reaction. b) Saws...
Product Instruction Manual
Page 15
... that the Quickstop has sufficient time to activate and stop the chain after activation, or may increase the time needed to help you identify the STIHL reduced kickback bars and low kickback chains. See the chapter entitled "Chain Brake" of ANSI B 175.1-2000 MS 311, MS 391 13 The matching of green decaled powerheads under 3.8 cubic inches...
... that the Quickstop has sufficient time to activate and stop the chain after activation, or may increase the time needed to help you identify the STIHL reduced kickback bars and low kickback chains. See the chapter entitled "Chain Brake" of ANSI B 175.1-2000 MS 311, MS 391 13 The matching of green decaled powerheads under 3.8 cubic inches...
Product Instruction Manual
Page 16
...5.11.2.4 of injury by kickback. They are designed to avoid kickback situations: 14 MS 311, MS 391 There are designed to reduce the risk of kickback injury when used which low kickback saw chains can be developed after publication of this does not eliminate the risk of ANSI B .... To avoid kickback The best protection from personal injury that may be used with STIHL green labeled low kickback chains. Any chain saw users. Do not mount a bow guide on any STIHL chain saw chain have not been tested with all safety precautions to reduce kickback energy. Low kickback...
...5.11.2.4 of injury by kickback. They are designed to avoid kickback situations: 14 MS 311, MS 391 There are designed to reduce the risk of kickback injury when used which low kickback saw chains can be developed after publication of this does not eliminate the risk of ANSI B .... To avoid kickback The best protection from personal injury that may be used with STIHL green labeled low kickback chains. Any chain saw users. Do not mount a bow guide on any STIHL chain saw chain have not been tested with all safety precautions to reduce kickback energy. Low kickback...
Product Instruction Manual
Page 17
... and pinch the chain. 11. Use extreme caution when cutting small size brush and saplings which may cause material to pinch the top of the log or other forces that may affect the direction of the bar is suddenly stopped when it contacts the wood. MS 311, MS 391 15 1. ...Do not cut above shoulder height. 6. Don't cut limbs with these cutting techniques. 10. Begin cutting and continue at a time. 8. Cut only one log at full speed before it is used for shifting of the chain. 2. Cutting Techniques Felling Felling ...
... and pinch the chain. 11. Use extreme caution when cutting small size brush and saplings which may cause material to pinch the top of the log or other forces that may affect the direction of the bar is suddenly stopped when it contacts the wood. MS 311, MS 391 15 1. ...Do not cut above shoulder height. 6. Don't cut limbs with these cutting techniques. 10. Begin cutting and continue at a time. 8. Cut only one log at full speed before it is used for shifting of the chain. 2. Cutting Techniques Felling Felling ...
Product Instruction Manual
Page 20
This is the hinge. you could lose control of the direction of the fall. never steel, which can damage the chain. 18 MS 311, MS 391 This is especially important in softwood in summer - N Helps control the falling tree. If the tip of diameter uncut. it may cause kickback. N Cut ...
This is the hinge. you could lose control of the direction of the fall. never steel, which can damage the chain. 18 MS 311, MS 391 This is especially important in softwood in summer - N Helps control the falling tree. If the tip of diameter uncut. it may cause kickback. N Cut ...
Product Instruction Manual
Page 21
...Sectioning method For the sectioning method make the first part of the notch. On the last cut, do not cut a large, wide felling notch. MS 311, MS 391 19 Then, using the bumper spike as the hinge. Avoid repositioning the saw for the next cut. Make a plunge cut in the center of... small diameter trees: simple fan cut Felling cut for large diameter trees 1 English 2 4 001BA147 KN 001BA148 KN Engage the bumper spikes of the chain saw directly behind the location of the intended hinge and pivot the saw begins to pinch, insert a wedge to keep the felling cut straight. First...
...Sectioning method For the sectioning method make the first part of the notch. On the last cut, do not cut a large, wide felling notch. MS 311, MS 391 19 Then, using the bumper spike as the hinge. Avoid repositioning the saw for the next cut. Make a plunge cut in the center of... small diameter trees: simple fan cut Felling cut for large diameter trees 1 English 2 4 001BA147 KN 001BA148 KN Engage the bumper spikes of the chain saw directly behind the location of the intended hinge and pivot the saw begins to pinch, insert a wedge to keep the felling cut straight. First...
Product Instruction Manual
Page 22
... while limbing it - Always keep to the tree at full throttle, insert the guide bar in the trunk. Be extremely careful with a chain saw , you are inexperienced with partially fallen trees which the recess is about the same as shown in which are poorly supported. Begin the... may slip or the log may jump backwards off the ground. English The plunge cut 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). Warning! When the tree starts to maintain control of a professional...
... while limbing it - Always keep to the tree at full throttle, insert the guide bar in the trunk. Be extremely careful with a chain saw , you are inexperienced with partially fallen trees which the recess is about the same as shown in which are poorly supported. Begin the... may slip or the log may jump backwards off the ground. English The plunge cut 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). Warning! When the tree starts to maintain control of a professional...
Product Instruction Manual
Page 23
... tool is used , STIHL may cause serious or fatal injury. shaped supports on the uphill side of non-STIHL parts may deny coverage. 001BA151 KN Warning! 2 Use only identical STIHL replacement parts for rolling ... or foot. 001BA051 LÄ Logs under strain: Risk of pinching! Never hold the log with your STIHL servicing dealer only. If on a slope, stand on top of the emission control devices and systems may... and 2 repair instructions in your instruction manual. MS 311, MS 391 21 Shattered wood should work not described in the appropriate section of the saw...
... tool is used , STIHL may cause serious or fatal injury. shaped supports on the uphill side of non-STIHL parts may deny coverage. 001BA151 KN Warning! 2 Use only identical STIHL replacement parts for rolling ... or foot. 001BA051 LÄ Logs under strain: Risk of pinching! Never hold the log with your STIHL servicing dealer only. If on a slope, stand on top of the emission control devices and systems may... and 2 repair instructions in your instruction manual. MS 311, MS 391 21 Shattered wood should work not described in the appropriate section of the saw...
Product Instruction Manual
Page 24
...size. (Note: If terminal has detachable SAE adapter nut, it must be kept free of fire, never operate your STIHL chain saw should be returned immediately for the chain brake on your saw if the screen is used and other foreign matter which the saw if the muffler is greater... reasons, each use. You can render it and the ignition lead are always clean and in the instruction manual). 22 MS 311, MS 391 For any maintenance of the chain brake, the brake band and clutch drum must be thoroughly cleaned or there is engaged. Excessive wear will reduce the effectiveness...
...size. (Note: If terminal has detachable SAE adapter nut, it must be kept free of fire, never operate your STIHL chain saw should be returned immediately for the chain brake on your saw if the screen is used and other foreign matter which the saw if the muffler is greater... reasons, each use. You can render it and the ignition lead are always clean and in the instruction manual). 22 MS 311, MS 391 For any maintenance of the chain brake, the brake band and clutch drum must be thoroughly cleaned or there is engaged. Excessive wear will reduce the effectiveness...