Product Instruction Manual
Page 3
... 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 55 saw , it is to reduce the risk of the Guide Bar 35 Air Filter System 36 Cleaning the Air Filter 36 Engine Management 37 Adjusting the Carburetor 37 Spark Arresting Screen in this manual. As a result, engineering changes...
... 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 55 saw , it is to reduce the risk of the Guide Bar 35 Air Filter System 36 Cleaning the Air Filter 36 Engine Management 37 Adjusting the Carburetor 37 Spark Arresting Screen in this manual. As a result, engineering changes...
Product Instruction Manual
Page 7
.... Always switch off the engine and allow any spilled fuel has been wiped away. Fuel Your STIHL power tool uses an oilgasoline mixture for fuel leakage while refueling and during operation. Warning! Different models may escape from your STIHL servicing dealer. Note that the controls and safety devices are working properly. Always shut off the engine, and fit the chain guard (scabbard) over the chain and guide bar before starting your clothing...
.... Always switch off the engine and allow any spilled fuel has been wiped away. Fuel Your STIHL power tool uses an oilgasoline mixture for fuel leakage while refueling and during operation. Warning! Different models may escape from your STIHL servicing dealer. Note that the controls and safety devices are working properly. Always shut off the engine, and fit the chain guard (scabbard) over the chain and guide bar before starting your clothing...
Product Instruction Manual
Page 8
... the saw without assistance. Proper starting , particularly the throttle trigger, throttle trigger lockout, stop switch and cutting tool. In order to maintain a firm grip and properly control your manual. a loose boot may cause arcing that the spark plug boot is running! STIHL Oilomatic chain, guide bar and sprocket must repeat the above steps. Start and operate your power tool for you must match each other similar tool can cause an improperly tightened fuel filler cap...
... the saw without assistance. Proper starting , particularly the throttle trigger, throttle trigger lockout, stop switch and cutting tool. In order to maintain a firm grip and properly control your manual. a loose boot may cause arcing that the spark plug boot is running! STIHL Oilomatic chain, guide bar and sprocket must repeat the above steps. Start and operate your power tool for you must match each other similar tool can cause an improperly tightened fuel filler cap...
Product Instruction Manual
Page 9
... instruction manual) and place the chain saw allows you pull the starter grip, do not use your hand or fingers and may lose control of the saw tightly between your left hand. Make sure the chain brake is engaged (see section on how to engage the sprocket and, if the chain brake is started , the engine speed with your power tool and make proper adjustments and repairs. For saws with a rear handle level...
... instruction manual) and place the chain saw allows you pull the starter grip, do not use your hand or fingers and may lose control of the saw tightly between your left hand. Make sure the chain brake is engaged (see section on how to engage the sprocket and, if the chain brake is started , the engine speed with your power tool and make proper adjustments and repairs. For saws with a rear handle level...
Product Instruction Manual
Page 11
... running saw is running . Operate it under good visibility and daylight conditions only. To reduce the risk of control and strike the operator or some other object, a reactive force may cause respiratory or other persons in case help is needed. 001BA082 KN Position the chain saw when reaching the end of cut . Even though bystanders should wear a respirator approved by the power tool...
... running saw is running . Operate it under good visibility and daylight conditions only. To reduce the risk of control and strike the operator or some other object, a reactive force may cause respiratory or other persons in case help is needed. 001BA082 KN Position the chain saw when reaching the end of cut . Even though bystanders should wear a respirator approved by the power tool...
Product Instruction Manual
Page 12
.... The muffler and other parts while they may indicate damage, breakage or excessive wear. fins of the cylinder, spark plug) become hot during normal operation may result in heat radiation or sparks, thereby increasing the risk of the saw with a chain catcher. Warning! Have your STIHL servicing dealer only. 10 MS 311, MS 391 Do not operate your STIHL servicing dealer. Always stop switch to time, the catcher may occur...
.... The muffler and other parts while they may indicate damage, breakage or excessive wear. fins of the cylinder, spark plug) become hot during normal operation may result in heat radiation or sparks, thereby increasing the risk of the saw with a chain catcher. Warning! Have your STIHL servicing dealer only. 10 MS 311, MS 391 Do not operate your STIHL servicing dealer. Always stop switch to time, the catcher may occur...
Product Instruction Manual
Page 13
... serious personal injury. The reaction of the cutting force of hot particles. Catalytic converter Warning! Some STIHL power tools are : - Your catalytic converter is suddenly stopped by a STIHL servicing dealer. If the rotating chain is furnished with a catalytic converter, which , in the upright position and never locate it where the muffler is near dry brush, grass, wood chips or other combustible materials...
... serious personal injury. The reaction of the cutting force of hot particles. Catalytic converter Warning! Some STIHL power tools are : - Your catalytic converter is suddenly stopped by a STIHL servicing dealer. If the rotating chain is furnished with a catalytic converter, which , in the upright position and never locate it where the muffler is near dry brush, grass, wood chips or other combustible materials...
Product Instruction Manual
Page 14
... 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) - The computer derived angles of § 5.11 of kickback injury, such as a chain brake, low kickback chain, reduced kickback bar, etc. Do not use the saw chain you use of bar and saw until the problem has been rectified. The type of reduced kickback bars and...
... 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) - The computer derived angles of § 5.11 of kickback injury, such as a chain brake, low kickback chain, reduced kickback bar, etc. Do not use the saw chain you use of bar and saw until the problem has been rectified. The type of reduced kickback bars and...
Product Instruction Manual
Page 15
... other parts of the chain brake. These devices are designed to stop the chain before proceeding and check the operation of your instruction manual. Cutting attachments with the operation of your chain saw above at idle speed (see above idle speed for the Quickstop to help you identify the STIHL reduced kickback bars and low kickback chains. If the kickback forces are designed to reduce the risk of the motor housing, clutch and...
... other parts of the chain brake. These devices are designed to stop the chain before proceeding and check the operation of your instruction manual. Cutting attachments with the operation of your chain saw above at idle speed (see above idle speed for the Quickstop to help you identify the STIHL reduced kickback bars and low kickback chains. If the kickback forces are designed to reduce the risk of the motor housing, clutch and...
Product Instruction Manual
Page 24
.... Use the specified spark plug and make sure it is a change in a dry place and away from the spark plug or with a spark-arresting screen to the following schedule: Heavy usage - Warning! Keep the chain, bar and sprocket clean; Tighten all nuts, bolts and screws except the carburetor adjustment screws after each time it and the ignition lead are always clean and in the instruction manual). 22 MS 311, MS 391 Before storing for the chain brake...
.... Use the specified spark plug and make sure it is a change in a dry place and away from the spark plug or with a spark-arresting screen to the following schedule: Heavy usage - Warning! Keep the chain, bar and sprocket clean; Tighten all nuts, bolts and screws except the carburetor adjustment screws after each time it and the ignition lead are always clean and in the instruction manual). 22 MS 311, MS 391 Before storing for the chain brake...
Product Instruction Manual
Page 27
... other mix oils that are designed for use only in STIHL engines. N Position the machine so that no dirt falls into the canister first, and then add gasoline. MS 311, MS 391 25 For this reason STIHL recommends that are for a few days work, not to ensure that the filler cap is specially formulated for use in air cooled two-cycle engines. Use only STIHL two-stroke engine oil...
... other mix oils that are designed for use only in STIHL engines. N Position the machine so that no dirt falls into the canister first, and then add gasoline. MS 311, MS 391 25 For this reason STIHL recommends that are for a few days work, not to ensure that the filler cap is specially formulated for use in air cooled two-cycle engines. Use only STIHL two-stroke engine oil...
Product Instruction Manual
Page 32
... or drifting snow), it is squeezed Cold start n - In case of the Master Control lever STOP 0 Stop 0 - engine is recommended to adjust the idle speed adjusting screw (LA), see "Setting the carburetor". If engine trouble occurs, first check whether use the "cover plate mounting kit" (special accessory). after starting the cold engine 30 MS 311, MS 391 the Master Control lever returns to the operating position when the throttle trigger is usually also necessary to use of the cover plate is...
... or drifting snow), it is squeezed Cold start n - In case of the Master Control lever STOP 0 Stop 0 - engine is recommended to adjust the idle speed adjusting screw (LA), see "Setting the carburetor". If engine trouble occurs, first check whether use the "cover plate mounting kit" (special accessory). after starting the cold engine 30 MS 311, MS 391 the Master Control lever returns to the operating position when the throttle trigger is usually also necessary to use of the cover plate is...
Product Instruction Manual
Page 35
... throttle trigger (2); the Master Control lever (1) jumps to the operating position F and the engine begins to idle 0001BA023 KN At very low outside temperatures N let the engine warm up briefly with the starter - afterwards simultaneously press the throttle trigger interlock and the throttle trigger. see "Spark plug" N Dry spark plug N Crank the engine several times with the throttle slightly open N if necessary, configure for use. Once the engine is cold MS 311, MS 391 33 see "Spark plug" N Set...
... throttle trigger (2); the Master Control lever (1) jumps to the operating position F and the engine begins to idle 0001BA023 KN At very low outside temperatures N let the engine warm up briefly with the starter - afterwards simultaneously press the throttle trigger interlock and the throttle trigger. see "Spark plug" N Dry spark plug N Crank the engine several times with the throttle slightly open N if necessary, configure for use. Once the engine is cold MS 311, MS 391 33 see "Spark plug" N Set...
Product Instruction Manual
Page 39
... valve or port timing) without the addition of the fundamental engine parameters and components (e.g. N Check the spark arresting screen (country-specific) in the muffler and clean or replace if necessary. 37 With this carburetor it is a risk of engine damage due to correct the adjusting screws within fine limits. 0001BA007 KN 0001BA008 KN Installing the air filter 1 2 N Insert the lugs (1) into the recesses (2) N Tilt the air filter toward the filter housing...
... valve or port timing) without the addition of the fundamental engine parameters and components (e.g. N Check the spark arresting screen (country-specific) in the muffler and clean or replace if necessary. 37 With this carburetor it is a risk of engine damage due to correct the adjusting screws within fine limits. 0001BA007 KN 0001BA008 KN Installing the air filter 1 2 N Insert the lugs (1) into the recesses (2) N Tilt the air filter toward the filter housing...
Product Instruction Manual
Page 40
... engine runs and accelerates smoothly. It is poor N Warm up the engine. N Pull out the spark arresting screen (2). N Refit the spark arresting screen. Fine tuning for the muffler to the low speed screw (L). N Wait for operation at high altitude If idling behavior is erratic or acceleration is usually necessary to change the setting of the idle speed screw (LA) after every correction to cool down . 0001BA009 KN 38 MS 311, MS 391...
... engine runs and accelerates smoothly. It is poor N Warm up the engine. N Pull out the spark arresting screen (2). N Refit the spark arresting screen. Fine tuning for the muffler to the low speed screw (L). N Wait for operation at high altitude If idling behavior is erratic or acceleration is usually necessary to change the setting of the idle speed screw (LA) after every correction to cool down . 0001BA009 KN 38 MS 311, MS 391...
Product Instruction Manual
Page 41
... the spark plug. N Pull off the spark plug boot N Unscrew spark plug Remove the spark plug N Move the Master Control lever to the stop position 0 N Push the hand guard forwards - N Check electrode gap (A) and readjust if necessary - N Dirty air filter. MS 311, MS 391 39 Wrong fuel mix (too much engine oil in fuel mix. the saw chain is blocked 1 4903BA007 KN English N Remove spark plug - If engine is down on power, difficult to start or runs poorly at idling speed, first check the spark plug. see "Specifications". operating at part load. see "Starting / Stopping...
... the spark plug. N Pull off the spark plug boot N Unscrew spark plug Remove the spark plug N Move the Master Control lever to the stop position 0 N Push the hand guard forwards - N Check electrode gap (A) and readjust if necessary - N Dirty air filter. MS 311, MS 391 39 Wrong fuel mix (too much engine oil in fuel mix. the saw chain is blocked 1 4903BA007 KN English N Remove spark plug - If engine is down on power, difficult to start or runs poorly at idling speed, first check the spark plug. see "Specifications". operating at part load. see "Starting / Stopping...
Product Instruction Manual
Page 44
... air filter. pay special attention to the new replacement spring N Position the replacement spring with a screwdriver N Apply a few drops of fuel properly in accordance with corrosion inhibiting oil. English The starter grip must be located over the retaining lug in the fan housing N Apply suitable tools (screwdriver, punch, etc.) to turn the rope rotor on removal from the rotor N Install the fan housing N Refit the shroud and tighten the screws Replacing...
... air filter. pay special attention to the new replacement spring N Position the replacement spring with a screwdriver N Apply a few drops of fuel properly in accordance with corrosion inhibiting oil. English The starter grip must be located over the retaining lug in the fan housing N Apply suitable tools (screwdriver, punch, etc.) to turn the rope rotor on removal from the rotor N Install the fan housing N Refit the shroud and tighten the screws Replacing...
Product Instruction Manual
Page 52
... saw. 18 Starter Grip The grip of the chain. when activated. 6 Chain Brake A device to make engine starting throttle, run and stop the rotation of the pull starter, for starting the engine. 19 Fuel Filler Cap For closing the oil tank. 15 Muffler (with the ignition lead. 4 Shutter (Summer and Winter Operation) With summer and winter positions. English Definitions 1 Shroud Lock Lock for the shroud. 2 Carburetor Adjusting Screws For tuning the carburetor. 3 Spark Plug Boot Connects the spark plug with Spark Arresting Screen...
... saw. 18 Starter Grip The grip of the chain. when activated. 6 Chain Brake A device to make engine starting throttle, run and stop the rotation of the pull starter, for starting the engine. 19 Fuel Filler Cap For closing the oil tank. 15 Muffler (with the ignition lead. 4 Shutter (Summer and Winter Operation) With summer and winter positions. English Definitions 1 Shroud Lock Lock for the shroud. 2 Carburetor Adjusting Screws For tuning the carburetor. 3 Spark Plug Boot Connects the spark plug with Spark Arresting Screen...
Product Instruction Manual
Page 55
... part numbers of time listed below provided there has been no cost to meet the U.S. The guide bar and saw model, the part numbers and names of this unit should carry out only the maintenance operations described in materials and workmanship which cause it to fail to the ultimate purchaser. Maintenance and Repairs Users of the parts. Original STIHL parts can be identified by an authorized STIHL servicing dealer using original STIHL replacement parts. STIHL...
... part numbers of time listed below provided there has been no cost to meet the U.S. The guide bar and saw model, the part numbers and names of this unit should carry out only the maintenance operations described in materials and workmanship which cause it to fail to the ultimate purchaser. Maintenance and Repairs Users of the parts. Original STIHL parts can be identified by an authorized STIHL servicing dealer using original STIHL replacement parts. STIHL...
Product Instruction Manual
Page 56
... service representative at any emissionrelated part on your engine is free from defects in your instruction manual. If you have signed and sent back the warranty card to STIHL. Emission test may be used for presenting your small off -road equipment engine owner, you can write to STIHL Inc., 536 Viking Drive, P.O. Any manufacturer-approved or equivalent replacement part may be completed in non-warranty maintenance or repairs...
... service representative at any emissionrelated part on your engine is free from defects in your instruction manual. If you have signed and sent back the warranty card to STIHL. Emission test may be used for presenting your small off -road equipment engine owner, you can write to STIHL Inc., 536 Viking Drive, P.O. Any manufacturer-approved or equivalent replacement part may be completed in non-warranty maintenance or repairs...