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Stihl MS 311, MS 391 Chainsaw Brushcutters & Parts Workshop Service Repair Manual

Stihl MS 311, MS 391 Chainsaw Brushcutters & Parts Workshop Service Repair Manual

Stihl MS 311, MS 391 Chainsaw Brushcutters & Parts Workshop Service Repair Manual

This Stihl MS 311, MS 391 service manual contains detailed descriptions of all the repair and servicing procedures specific to this power tool. You should make use of the illustrated parts lists while carrying out repair work. They show the installed positions of the individual components and assemblies. Refer to the latest edition of the relevant parts list to check the part numbers of any replacement parts. A fault on the machine may have several causes. To help locate the fault, consult the chapter on “Troubleshooting” and the “STIHL Service Training System” for all assemblies. Refer to the “Technical Information” bulletins for engineering changes which have been introduced since publication of this service manual. Technical information bulletins also supplement the parts list until a revised edition is issued. The special tools mentioned in the descriptions are listed in the chapter on “Special Servicing Tools” in this manual. Use the part numbers to identify the tools in the “STIHL Special Tools” manual. The manual lists all special servicing tools currently available from STIHL.

MS341-MS361 Service Manual

This Manual Covers
1. Introduction G3.1001344
2. Safety Precautions G3.1004180
3. Specifications G4.1002743
3.1 Engine G4.1010855
3.2 Fuel System G4.1010629
3.3 Ignition System G4.1010653
3.4 Chain Lubrication G4.1010677
3.5 Tightening Torques G5.1005354
4. Troubleshooting Chart G6.1010130
4.1 Clutch, Chain Drive, Chain Brake, Chain Tensioner G6.1010388
4.2 Rewind Starter G7.1005354
4.3 Chain Lubrication G8.1005354
4.4 Ignition System G9.1005354
4.5 Carburetor G9.1007679
4.6 Engine G10.1005354
5. Clutch, Chain Drive, Chain Brake and Chain Tensioner G11.1065686
5.1 Clutch Drum / Chain Sprocket G11.1033067
5.2 Replacing the Chain Catcher G11.1029904
5.3 Spiked Bumper G11.1035324
5.4 Clutch G11.1023765
5.5 Checking Operation of Chain Brake G11.1030350
5.5.1 Removing and Installing (without QuickStop Super) G11.1030385
5.5.2 Removing and Installing (with QuickStop Super) G11.1031131
5.5.3 Brake Cable G11.1039910
5.5.4 Checking Play G11.1031149
5.5.5 Adjusting Play G11.1031156
5.5.6 Checking Operation of Coasting Brake G11.1031167
5.6 Chain Tensioner G11.1031176
5.7 Bar Mounting Studs G11.1033053
6. Engine G11.1033123
6.1 Muffler/Spark Arresting Screen G11.1033127
6.2 Shroud G11.1033275
6.3 Leakage Test G11.1033428
6.3.1 Preparations G11.1033476
6.3.2 Pressure Test G11.1033804
6.3.3 Vacuum Test G11.1033823
6.4 Oil Seals G11.1033850
6.5 Cylinder and Piston G11.1034234
6.5.1 Removing G11.1034722
6.5.2 Installing G11.1034920
6.6 Piston Rings G11.1034948
6.7 Crankcase/ Crankshaft G11.1035086
6.7.1 Removing G11.1035123
6.7.2 Installing G11.1036463
6.8 Decompression Valve G11.1066930
7. Ignition System G11.1066932
7.1 Ignition Module G11.1037633
7.1.1 Ignition Timing G11.1037653
7.1.2 Removing and Installing G11.1037635
7.1.3 Testing the Ignition Module G11.1037639
7.1.4 Ignition Lead / Spark Plug Boot G11.1037745
7.1.5 Flywheel G11.1037750
7.2 Contact Spring G11.1039586
7.3 Testing Wiring Harness G11.1039638
7.4 Ignition System Troubleshooting G12.1002743
8. Rewind Starter G13.1044741
8.1 General G13.1044742
8.2 Removing and Installing G13.1012000
8.3 Pawls G13.1012006
8.4 Rope Rotor G13.1012548
8.5 Starter Rope / Grip G13.1012551
8.6 Tensioning G13.1012001
8.7 Segment G13.1013422
8.8 Starter Rope Guide Bushing G13.1013837
8.9 Replacing the Rewind Spring G13.1013910
9. AV System G13.1013963
9.1 Repair G13.1013968
9.1.1 Spring between Front Handle and Cylinder G13.1013992
9.1.2 Annular Buffer between Tank Housing and Crankcase G13.1013994
9.1.3 Spring, Annular Buffer between Crankcase and Tank Housing G13.1013996
9.1.4 Stop Buffer between Crankcase and Tank Housing G13.1015218
10. Master Control / Handle System G13.1014000
10.1 Switch Shaft G13.1014493
10.2 Throttle Trigger / Interlock Lever G13.1014502
10.2.1 Without QuickStop Super G13.1014737
10.2.2 With QuickStop Super G13.1014909
10.3 Front Handle G13.1019590
11. Chain Lubrication G13.1015079
11.1 Pickup Body / Suction Hose G13.1015164
11.2 Valve G13.1015526
11.2.1 Cleaning G13.1015563
11.2.2 Replacing G13.1015670
11.3 Oil Pump G13.1015738
11.3.1 Removing and Installing G13.1015779
11.3.2 Servicing G13.1015824
12. Fuel System G13.1015785
12.1 Air Filter G13.1015969
12.2 Carburetor G13.1016114
12.2.1 Removing and Installing G13.1016153
12.2.2 Leakage Test G13.1016338
12.3 Servicing the Carburetor G13.1016451
12.3.1 Metering Diaphragm G13.1016560
12.3.2 Inlet Needle G13.1017329
12.3.3 Fixed Jet G13.1017332
12.3.4 Pump Diaphragm G13.1017334
12.3.5 Accelerator Pump G13.1017338
12.4 User Adjustment G13.1017344
12.5 Basic Setting G13.1017348
12.6 Tank Vent G13.1017526
12.7 Pickup Body G13.1017534
12.8 Fuel Hose G13.1017917
12.9 Separating Crankcase and Tank Housing G13.1013838
12.10 Replacing the Tank Housing G13.1018081
13. Carburetor Heating G13.1019752
13.1 Testing G13.1019877
13.2 Troubleshooting Chart G14.1002743
14. Handle Heating System G15.1021424
14.1 Troubleshooting G15.1021426
14.2 Testing Heating Element in Rear Handle G15.1025114
14.3 Removing and Installing G15.1025490
14.4 Testing Heating Element in Front Handle G15.1021303
14.5 Removing and Installing G15.1025430
14.6 Heater Switch G15.1025944
14.7 Generator G15.1026021
14.7.1 Troubleshooting Chart G16.1002743
14.7.2 Test Connections and Test Values G17.1002743
14.8 Wiring Harness G18.1023765
14.8.1 Without Handle and Carburetor Heating G18.1026482
14.8.2 With Handle Heating System G18.1026485
14.8.3 With Handle and Carburetor Heating System G18.1026488
15. Special Servicing Tools G19.1002743
16. Servicing Aids G20.1002743

MS341 – 1135 111
MS360 – 1125 139
MS360C – 1125 181
MS361 – 1135 217

Clutch, Chain Drive, Chain Brake And Chain Tensioner
Ignition System
Rewind Starter
AV Handle System
Master Control / Handle System
Chain Lubrication
Fuel System
Special Servicing Tools And Aids


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