Product Instruction Manual
Page 22
... stand directly behind the tree when it is an extreme danger of the falling tree. Warning! Be extremely careful with the nose of the guide bar. Start limbing by lifting the limb. Be extremely cautious when cutting limbs or logs under tension (spring poles). English The plunge cut is removing... in the trunk. To make the felling cut as the width of the guide bar. Warning! In order to cut it - Cut until the depth of the kerf is cutting a log into sections. 001BA033 KN 20 MS 311, MS 391 Be extremely cautious and avoid contacting the log or other reason does not fall...
... stand directly behind the tree when it is an extreme danger of the falling tree. Warning! Be extremely careful with the nose of the guide bar. Start limbing by lifting the limb. Be extremely cautious when cutting limbs or logs under tension (spring poles). English The plunge cut is removing... in the trunk. To make the felling cut as the width of the guide bar. Warning! In order to cut it - Cut until the depth of the kerf is cutting a log into sections. 001BA033 KN 20 MS 311, MS 391 Be extremely cautious and avoid contacting the log or other reason does not fall...
Product Instruction Manual
Page 31
... Remove shroud N Move the Master Control lever to overheating 0001BA003 KN MS 311, MS 391 29 r facing upwards N Refit the shroud and tighten the ...engine may malfunction due to the stop position 0 N Push the hand guard forwards - At temperatures above +70 °F (+20 °C) N Ensure that the slide is blocked 1 1 N Pull the slide (1) out of chain brake Winter Operation Pre... 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). Accelerate up to have it has been properly maintained...
... Remove shroud N Move the Master Control lever to overheating 0001BA003 KN MS 311, MS 391 29 r facing upwards N Refit the shroud and tighten the ...engine may malfunction due to the stop position 0 N Push the hand guard forwards - At temperatures above +70 °F (+20 °C) N Ensure that the slide is blocked 1 1 N Pull the slide (1) out of chain brake Winter Operation Pre... 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). Accelerate up to have it has been properly maintained...
Product Instruction Manual
Page 37
every time you sharpen the chain and every time you replace the chain - MS 311, MS 391 35 English Oil Quantity Control Adjustable flow oil pump is less than specified: N Replace the guide bar. Ematic position (E), medium oil flow rate - N Measure the groove depth -... Different quantities of machine) to "E" (Ematic position). N Regularly clean the oil inlet hole (1), the oilway (2) and the bar groove (3). Chain type Picco Rapid Rapid Rapid Pitch Minimum groove depth 3/8" P 0.20" (5.0 mm) 1/4" 0.16" (4.0 mm) 3/8"; 0.325" 0.24" (6.0 mm) 0.404" 0.28" (7.0 mm) If...
every time you sharpen the chain and every time you replace the chain - MS 311, MS 391 35 English Oil Quantity Control Adjustable flow oil pump is less than specified: N Replace the guide bar. Ematic position (E), medium oil flow rate - N Measure the groove depth -... Different quantities of machine) to "E" (Ematic position). N Regularly clean the oil inlet hole (1), the oilway (2) and the bar groove (3). Chain type Picco Rapid Rapid Rapid Pitch Minimum groove depth 3/8" P 0.20" (5.0 mm) 1/4" 0.16" (4.0 mm) 3/8"; 0.325" 0.24" (6.0 mm) 0.404" 0.28" (7.0 mm) If...
Product Instruction Manual
Page 51
...Parts 3 5 2 4 # 1 6 11 7 12 8 10 9 13 16 17 15 18 20 22 19 23 21 14 24 English 1 Shroud Lock 2 Carburetor Adjusting Screws 3 Spark Plug Boot ...Chain Brake 7 Chain Sprocket 8 Chain Sprocket Cover 9 Chain Catcher 10 Side Chain Tensioner 11 Bumper Spike 12 Guide Bar 13 Oilomatic Saw Chain 14 Oil Filler Cap 15 Muffler (with Spark Arresting Screen, not Fitted on all Markets) 16...Front Hand Guard 17 Front Handle (Handlebar) 18 Starter Grip 19 Fuel Filler Cap 20 Master Control Lever 21 Throttle Trigger 22 Throttle Trigger Lockout 23 Rear Handle 24 Rear Hand Guard # Serial...
...Parts 3 5 2 4 # 1 6 11 7 12 8 10 9 13 16 17 15 18 20 22 19 23 21 14 24 English 1 Shroud Lock 2 Carburetor Adjusting Screws 3 Spark Plug Boot ...Chain Brake 7 Chain Sprocket 8 Chain Sprocket Cover 9 Chain Catcher 10 Side Chain Tensioner 11 Bumper Spike 12 Guide Bar 13 Oilomatic Saw Chain 14 Oil Filler Cap 15 Muffler (with Spark Arresting Screen, not Fitted on all Markets) 16...Front Hand Guard 17 Front Handle (Handlebar) 18 Starter Grip 19 Fuel Filler Cap 20 Master Control Lever 21 Throttle Trigger 22 Throttle Trigger Lockout 23 Rear Handle 24 Rear Hand Guard # Serial...
Product Instruction Manual
Page 52
...Brake A device to stop the rotation of cutters, tie straps and drive links. 14 Oil Filler Cap For closing the fuel tank. 20 Master Control Lever Lever for choke control, starting easier - Is activated in winter position. 5 Decompression Valve (Automatically Resetting) Releases compression pressure... the left hand from operator. Spark arresting screen is designed to the operator's hands. (not illustrated) 50 MS 311, MS 391 Guide Bar Nose The exposed end of the guide bar. (not illustrated, see chapter "Tensioning the Saw Chain") Clutch Couples engine to chain sprocket when engine is...
...Brake A device to stop the rotation of cutters, tie straps and drive links. 14 Oil Filler Cap For closing the fuel tank. 20 Master Control Lever Lever for choke control, starting easier - Is activated in winter position. 5 Decompression Valve (Automatically Resetting) Releases compression pressure... the left hand from operator. Spark arresting screen is designed to the operator's hands. (not illustrated) 50 MS 311, MS 391 Guide Bar Nose The exposed end of the guide bar. (not illustrated, see chapter "Tensioning the Saw Chain") Clutch Couples engine to chain sprocket when engine is...
Product Instruction Manual
Page 53
additional manual oil flow control Oil tank capacity: 11.8 oz (0.350 l) Weight English dry, without bar and chain MS 311: 14.1 lbs. (6.4 kg) MS 391: 14.1 lbs. (6.4 kg) Cutting attachment Recommended cutting attachments in compliance with Sec. 5.11 of ...guide bars STIHL reduced kickback guide bars (with green label) Bar lengths: 16, 18, 20 in. (40, 45, 50 cm) Pitch: 3/8" (9.32 mm) Groove width: 0.050 in. (1.3 mm) or 0.063 in. (1.6 mm) Sprocket nose: 10- Category A = 300 hours B = 125 hours C = 50 hours Engine STIHL single cylinder two-stroke engine MS 311 Displacement...
additional manual oil flow control Oil tank capacity: 11.8 oz (0.350 l) Weight English dry, without bar and chain MS 311: 14.1 lbs. (6.4 kg) MS 391: 14.1 lbs. (6.4 kg) Cutting attachment Recommended cutting attachments in compliance with Sec. 5.11 of ...guide bars STIHL reduced kickback guide bars (with green label) Bar lengths: 16, 18, 20 in. (40, 45, 50 cm) Pitch: 3/8" (9.32 mm) Groove width: 0.050 in. (1.3 mm) or 0.063 in. (1.6 mm) Sprocket nose: 10- Category A = 300 hours B = 125 hours C = 50 hours Engine STIHL single cylinder two-stroke engine MS 311 Displacement...
User Manual
Page 2
...Body 65 11.2 Oil Suction Hose 65 44 11.3 Oil Pump 66 46 11.4 Valve 67 46 48 5.1 Checking Operation 20 8. Specifications 5 6.3 Oil Seals 30 9.4 AV Spring on 6.2.3 Pressure Test 29 Fuel Tank 57 2. Troubleshooting 8 7. Chain...20 5.3 Brake Lever 22 8.1 General 51 5.4 Cam Lever 24 8.2 Fan housing 51 5.5 Pins 25 8.2.1 Segment 51 5.6 Chain Tensioner 25 8.3 Pawls 51 5.7 Bar Mounting Studs 26 8.4 Rope Rotor 52 8.5 Starter Rope / Grip 53 8.6 Tensioning the Rewind Spring 54 8.7 Replacing the Rewind Spring 55 RA_542_00_01_01 MS 311, MS 391 q © ANDREAS STIHL...
...Body 65 11.2 Oil Suction Hose 65 44 11.3 Oil Pump 66 46 11.4 Valve 67 46 48 5.1 Checking Operation 20 8. Specifications 5 6.3 Oil Seals 30 9.4 AV Spring on 6.2.3 Pressure Test 29 Fuel Tank 57 2. Troubleshooting 8 7. Chain...20 5.3 Brake Lever 22 8.1 General 51 5.4 Cam Lever 24 8.2 Fan housing 51 5.5 Pins 25 8.2.1 Segment 51 5.6 Chain Tensioner 25 8.3 Pawls 51 5.7 Bar Mounting Studs 26 8.4 Rope Rotor 52 8.5 Starter Rope / Grip 53 8.6 Tensioning the Rewind Spring 54 8.7 Replacing the Rewind Spring 55 RA_542_00_01_01 MS 311, MS 391 q © ANDREAS STIHL...
User Manual
Page 6
...gauge pressure: under vacuum: 2.2 Fuel System 2.3 Ignition System 2.4 Chain Lubrication MS 311, MS 391 MS 311 59 cm3 47 mm 34 mm 3 kW (4 bhp) at 9,500 rpm 13,000 rpm 2,800 rpm Centrifugal clutch without linings 3,500 rpm 0.5 bar 0.5 bar MS 391 64.1 cm3 49 mm 34 mm 3.2 kW (4.4 bhp) at 9,...leakage test at gauge pressure: Operation of tank vent at gauge pressure: Fuel: 0.8 bar 0.5 bar as specified in instruction manual Air gap between ignition module and fanwheel: Spark plug (resistor type): Electrode gap: 0.20...0.30 mm NGK BPMR 7 A BOSCH WSR6F 0.5 mm Speed-controlled oil pump with ...
...gauge pressure: under vacuum: 2.2 Fuel System 2.3 Ignition System 2.4 Chain Lubrication MS 311, MS 391 MS 311 59 cm3 47 mm 34 mm 3 kW (4 bhp) at 9,500 rpm 13,000 rpm 2,800 rpm Centrifugal clutch without linings 3,500 rpm 0.5 bar 0.5 bar MS 391 64.1 cm3 49 mm 34 mm 3.2 kW (4.4 bhp) at 9,...leakage test at gauge pressure: Operation of tank vent at gauge pressure: Fuel: 0.8 bar 0.5 bar as specified in instruction manual Air gap between ignition module and fanwheel: Spark plug (resistor type): Electrode gap: 0.20...0.30 mm NGK BPMR 7 A BOSCH WSR6F 0.5 mm Speed-controlled oil pump with ...
User Manual
Page 30
...(2) until the pressure gauge (4) indicates a vacuum of 0.5 bar. the sealing lip lifts away from the crankshaft during the piston's induction stroke because there is airtight. - Remove the flange. - Reassemble all other parts in good condition. MS 311, MS 391 29 Line up the flange (1) 1140 890 1200 and... the suspect area with pressure test, b 6.2.3 6.2.3 Pressure Test Carry out the same preparations as for at least 20 seconds, the engine housing is no more than 0.3 bar within 20 seconds, it over the studs : Fit the test flange (1) 1140 890 1200. 4903RA237 TG : Connect suction hose...
...(2) until the pressure gauge (4) indicates a vacuum of 0.5 bar. the sealing lip lifts away from the crankshaft during the piston's induction stroke because there is airtight. - Remove the flange. - Reassemble all other parts in good condition. MS 311, MS 391 29 Line up the flange (1) 1140 890 1200 and... the suspect area with pressure test, b 6.2.3 6.2.3 Pressure Test Carry out the same preparations as for at least 20 seconds, the engine housing is no more than 0.3 bar within 20 seconds, it over the studs : Fit the test flange (1) 1140 890 1200. 4903RA237 TG : Connect suction hose...
User Manual
Page 85
Coat sealing ring of 0.5 bar. Push home the tank vent by hand 2 until the pressure gauge indicates a pressure of new tank vent with the fuel are retained by the pickup ... the rib (arrow) for at least 20 seconds, the fuel tank, including the tank vent, is airtight. Reassemble in accordance with environmental requirements, b 1 84 MS 311, MS 391 Always install a new tank vent. 4903RA244 TG 4903RA108 TG 12.11 Fuel Intake 12.11.1 Pickup Body Any impurities mixed with STIHL press fluid, b 14 - This restricts...
Coat sealing ring of 0.5 bar. Push home the tank vent by hand 2 until the pressure gauge indicates a pressure of new tank vent with the fuel are retained by the pickup ... the rib (arrow) for at least 20 seconds, the fuel tank, including the tank vent, is airtight. Reassemble in accordance with environmental requirements, b 1 84 MS 311, MS 391 Always install a new tank vent. 4903RA244 TG 4903RA108 TG 12.11 Fuel Intake 12.11.1 Pickup Body Any impurities mixed with STIHL press fluid, b 14 - This restricts...
User Manual
Page 90
Remarks: 1) Use for repairs Removing oil seals Removing oil seal(s) Removing limiter caps Removing bar mounting studs Removing and installing decompression valve Removing pickup body Rem. Setting disk 21 Screwdriver bit, T 27 x 150 22 Hook 23 Assembly stand 24 Puller - ... 5910 893 8800 Application Adjusting carburetor Add-on for screwdriver (adjusting carburetor) IS-P screws (4 mm) Detaching springs on clutch shoes Holding machines for releasing only. MS 311, MS 391 89 No. Description 20 Screwdriver -
Remarks: 1) Use for repairs Removing oil seals Removing oil seal(s) Removing limiter caps Removing bar mounting studs Removing and installing decompression valve Removing pickup body Rem. Setting disk 21 Screwdriver bit, T 27 x 150 22 Hook 23 Assembly stand 24 Puller - ... 5910 893 8800 Application Adjusting carburetor Add-on for screwdriver (adjusting carburetor) IS-P screws (4 mm) Detaching springs on clutch shoes Holding machines for releasing only. MS 311, MS 391 89 No. Description 20 Screwdriver -