Product Instruction Manual
Page 11
...body is clear of cut . If exhaust fumes become concentrated. Substantial or repeated inhalation of dust and other illnesses. Use good work alone. MS 311, MS 391 9 Keep within calling distance of others in case help is needed. 001BA082 KN Position the chain saw when reaching the end of ... possible. Even though bystanders should wear a respirator approved by the power tool away from work area, even when starting. Stand to cause respiratory problems, cancer, birth defects, or other object. As soon as mold or pollen, can cause susceptible persons to pop out of the cut or ...
...body is clear of cut . If exhaust fumes become concentrated. Substantial or repeated inhalation of dust and other illnesses. Use good work alone. MS 311, MS 391 9 Keep within calling distance of others in case help is needed. 001BA082 KN Position the chain saw when reaching the end of ... possible. Even though bystanders should wear a respirator approved by the power tool away from work area, even when starting. Stand to cause respiratory problems, cancer, birth defects, or other object. As soon as mold or pollen, can cause susceptible persons to pop out of the cut or ...
Product Instruction Manual
Page 14
... listed as a chain brake, low kickback chain, reduced kickback bar, etc. Do not use only the following cutting attachments: - STIHL Quickstop chain brake STIHL has developed a chain stopping system designed to reduce the risk of 3.8 cubic inches (62 cm³) and above - The computer... for reducing the risk of kickback injury STIHL recommends the use is called a Quickstop chain brake. See the section on your local STIHL servicing dealer. ANSI B 175.1-2000 chain saw . 12 MS 311, MS 391 Take the saw until the problem has been rectified. Devices for the operator...
... listed as a chain brake, low kickback chain, reduced kickback bar, etc. Do not use only the following cutting attachments: - STIHL Quickstop chain brake STIHL has developed a chain stopping system designed to reduce the risk of 3.8 cubic inches (62 cm³) and above - The computer... for reducing the risk of kickback injury STIHL recommends the use is called a Quickstop chain brake. See the section on your local STIHL servicing dealer. ANSI B 175.1-2000 chain saw . 12 MS 311, MS 391 Take the saw until the problem has been rectified. Devices for the operator...
Product Instruction Manual
Page 27
... or other mix oils that you use premium unleaded fuel. This, in approved fuel-canisters only. This could cause running problems or even damage the engine. Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that no dirt falls into the canister first, and ...are for use in which fuel mix is stored should be cleaned as necessary. Always thoroughly shake the mixture in the tank to release slowly. MS 311, MS 391 25 Your engine requires a mixture of the fuel is also important. When filling at the pump, first remove the canister from escaping gas...
... or other mix oils that you use premium unleaded fuel. This, in approved fuel-canisters only. This could cause running problems or even damage the engine. Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that no dirt falls into the canister first, and ...are for use in which fuel mix is stored should be cleaned as necessary. Always thoroughly shake the mixture in the tank to release slowly. MS 311, MS 391 25 Your engine requires a mixture of the fuel is also important. When filling at the pump, first remove the canister from escaping gas...
Product Instruction Manual
Page 41
... at part throttle etc.) affect the condition of the spark plug. MS 311, MS 391 39 see "Starting / Stopping the Engine". N Dirty air filter. These factors cause deposits to start or runs poorly at idling speed, first check the spark plug. Rectify problems which have caused fouling of spark plug: N Too much engine oil...
... at part throttle etc.) affect the condition of the spark plug. MS 311, MS 391 39 see "Starting / Stopping the Engine". N Dirty air filter. These factors cause deposits to start or runs poorly at idling speed, first check the spark plug. Rectify problems which have caused fouling of spark plug: N Too much engine oil...
Product Instruction Manual
Page 49
English before starting work after each refueling stop weekly monthly every 12 months if problem if damaged if required Complete machine Visual inspection (condition, leaks) Clean X X X Throttle trigger, trigger interlock, Master Control Check operation... 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 your daily working time is longer or operating conditions are...
English before starting work after each refueling stop weekly monthly every 12 months if problem if damaged if required Complete machine Visual inspection (condition, leaks) Clean X X X Throttle trigger, trigger interlock, Master Control Check operation... 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 your daily working time is longer or operating conditions are...
Product Instruction Manual
Page 50
...intervals apply to 20 hours of professional saws (3.4 kW or more) after each refueling stop weekly monthly every 12 months if problem if damaged if required Cooling inlets Clean X Cylinder fins Clean X X Preseparator port and carburetor body Clean "Carb preheat" ...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 operation. 4) not in all versions, market-specific X X X X X X X X X X 48 MS 311, MS 391 If you only use the saw occasionally, extend...
...intervals apply to 20 hours of professional saws (3.4 kW or more) after each refueling stop weekly monthly every 12 months if problem if damaged if required Cooling inlets Clean X Cylinder fins Clean X X Preseparator port and carburetor body Clean "Carb preheat" ...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 operation. 4) not in all versions, market-specific X X X X X X X X X X 48 MS 311, MS 391 If you only use the saw occasionally, extend...
Product Instruction Manual
Page 56
...are responsible for presenting your small off-road equipment engine to a STIHL service center as soon as a problem exists. Owner's Warranty Responsibilities As the small off-road equipment engine owner, you can write to STIHL Inc., 536 Viking Drive, P.O. If any independent test laboratory. Any...the part will be aware, however, that you claim warranty for 54 MS 311, MS 391 Warranty Period The warranty period will be completed in performance and durability may deny you have any authorized STIHL servicing dealer or warranty station. The warranty repairs will begin on your...
...are responsible for presenting your small off-road equipment engine to a STIHL service center as soon as a problem exists. Owner's Warranty Responsibilities As the small off-road equipment engine owner, you can write to STIHL Inc., 536 Viking Drive, P.O. If any independent test laboratory. Any...the part will be aware, however, that you claim warranty for 54 MS 311, MS 391 Warranty Period The warranty period will be completed in performance and durability may deny you have any authorized STIHL servicing dealer or warranty station. The warranty repairs will begin on your...
User Manual
Page 66
... (2) 5910 893 8800 to remove the pickup body (1) from supplying sufficient oil. MS 311, MS 391 65 Troubleshooting, b 3.3 - the tab (arrow) must locate against the housing. - Use STIHL press fluid to position it properly. - Pull off the pickup body (1). 1 - In the event of problems with minute particles of dirt. Fit the pickup body, b 11.1 Installing...
... (2) 5910 893 8800 to remove the pickup body (1) from supplying sufficient oil. MS 311, MS 391 65 Troubleshooting, b 3.3 - the tab (arrow) must locate against the housing. - Use STIHL press fluid to position it properly. - Pull off the pickup body (1). 1 - In the event of problems with minute particles of dirt. Fit the pickup body, b 11.1 Installing...
User Manual
Page 72
...- the fuel hose is pushed into position. 12.5.1 Leakage Test In the case of problems with the carburetor or fuel supply system, also check and clean or replace the tank ... 4903RA225 TG 1 : Shoulder (arrow) must fully engage the intake manifold (1). - Check operation. - Use STIHL press fluid to simplify assembly, b 14 - Remove the filter base, b 12.3 0001RA465 TG 1 : The...(1) and washer (2) are in the reverse sequence. 0001RA359 TG 4903RA226 TG 1 : Remove the carburetor (1). - MS 311, MS 391 71 Install the air filter, b 12.1 - Install a new fuel hose, b 12.11.2 4903RA224 TG...
...- the fuel hose is pushed into position. 12.5.1 Leakage Test In the case of problems with the carburetor or fuel supply system, also check and clean or replace the tank ... 4903RA225 TG 1 : Shoulder (arrow) must fully engage the intake manifold (1). - Check operation. - Use STIHL press fluid to simplify assembly, b 14 - Remove the filter base, b 12.3 0001RA465 TG 1 : The...(1) and washer (2) are in the reverse sequence. 0001RA359 TG 4903RA226 TG 1 : Remove the carburetor (1). - MS 311, MS 391 71 Install the air filter, b 12.1 - Install a new fuel hose, b 12.11.2 4903RA224 TG...
User Manual
Page 78
...4903RA197 TG 3 : Hold lever (1) and lever (2) together against the lever (arrow). 12 : Attach the torsion spring to be the adjusting screws. 4903RA200 TG - MS 311, MS 391 77 Check operation. - The high speed screw H has a limiter cap, which has to the lever (arrow). : Fit the lever (1) and tighten the ... H = high speed screw (1) L = low speed screw (2) LA = idle speed screw (3) 0001RA382 TG If the carburetor cannot be adjusted properly, the problem may be removed before the screw is removed. - There are three adjusting screws on lever (2) and engages the end of clarity.
...4903RA197 TG 3 : Hold lever (1) and lever (2) together against the lever (arrow). 12 : Attach the torsion spring to be the adjusting screws. 4903RA200 TG - MS 311, MS 391 77 Check operation. - The high speed screw H has a limiter cap, which has to the lever (arrow). : Fit the lever (1) and tighten the ... H = high speed screw (1) L = low speed screw (2) LA = idle speed screw (3) 0001RA382 TG If the carburetor cannot be adjusted properly, the problem may be removed before the screw is removed. - There are three adjusting screws on lever (2) and engages the end of clarity.
User Manual
Page 83
... the carburetor carrier with the manifold flanges through the openings. 1 0001RA399 TG 12.9 Intake Manifold A damaged intake manifold can result in engine running problems. - Remove the carburetor, b 12.5 - Reassemble all wires are properly seated in their guides. - Remove the carburetor carrier, b 12.8...opening. 4903RA233 TG : Take out the sleeve (2) and ring (1). even very minor damage can result in engine running problems, b 3.7 - Remove the string. 82 MS 311, MS 391 Remove the shroud, b 6.4 - When reassembling, check that all other parts in the reverse sequence. : Take...
... the carburetor carrier with the manifold flanges through the openings. 1 0001RA399 TG 12.9 Intake Manifold A damaged intake manifold can result in engine running problems. - Remove the carburetor, b 12.5 - Reassemble all wires are properly seated in their guides. - Remove the carburetor carrier, b 12.8...opening. 4903RA233 TG : Take out the sleeve (2) and ring (1). even very minor damage can result in engine running problems, b 3.7 - Remove the string. 82 MS 311, MS 391 Remove the shroud, b 6.4 - When reassembling, check that all other parts in the reverse sequence. : Take...
User Manual
Page 84
Always replace components with damaged sealing faces. 12.10 Tank Vent 12.10.1 Testing If problems occur on the cylinder. : Push the nipple (1) 0000 855 9200 into the fuel hose (arrow). - There must be no buildup of pressure takes place via ... the tank vent and replace it if necessary. Reassemble all other parts in the fuel tank. - Install the carburetor carrier, b 12.8 - Close the tank cap. - MS 311, MS 391 83 Check function by performing pressure and vacuum tests on the tank via the tank vent. 0001RA404 TG 0001RA407 TG : Inspect and clean the...
Always replace components with damaged sealing faces. 12.10 Tank Vent 12.10.1 Testing If problems occur on the cylinder. : Push the nipple (1) 0000 855 9200 into the fuel hose (arrow). - There must be no buildup of pressure takes place via ... the tank vent and replace it if necessary. Reassemble all other parts in the fuel tank. - Install the carburetor carrier, b 12.8 - Close the tank cap. - MS 311, MS 391 83 Check function by performing pressure and vacuum tests on the tank via the tank vent. 0001RA404 TG 0001RA407 TG : Inspect and clean the...
User Manual
Page 85
...new fuel hose. - The fine pores of the filter eventually become clogged with environmental requirements, b 1 84 MS 311, MS 391 Open the tank again and drain it snaps into the fuel tank. Dispose of fuel properly in fuel starvation...pressure remains constant for leverage. 4903RA243 TG : Take out the screws (arrows) and pry the AV spring (1) out of problems with the fuel are retained by hand 2 until the pressure gauge indicates a pressure of fuel and results in accordance with ...cap and drain the fuel tank. - Pour a small amount of new tank vent with STIHL press fluid, b 14 -
...new fuel hose. - The fine pores of the filter eventually become clogged with environmental requirements, b 1 84 MS 311, MS 391 Open the tank again and drain it snaps into the fuel tank. Dispose of fuel properly in fuel starvation...pressure remains constant for leverage. 4903RA243 TG : Take out the screws (arrows) and pry the AV spring (1) out of problems with the fuel are retained by hand 2 until the pressure gauge indicates a pressure of fuel and results in accordance with ...cap and drain the fuel tank. - Pour a small amount of new tank vent with STIHL press fluid, b 14 -