Stihl MS 230 Service Manual

1MS 210, MS 230, MS 250
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© ANDREAS STIHL AG & Co. KG, 2007
Contents
1. Introduction 2
2. Safety Precautions 3
3. Specifications 4
3.1 Engine 4
3.1.1 Engine (USA only) 4
3.2 Fuel System 5
3.3 Ignition System 5
3.4 Chain Lubrication 5
3.5 Tightening Torques 6
4. Troubleshooting
Chart 8
4.1 Clutch, Chain Drive,
Chain Brake,
Chain Tensioner 8
4.2 Rewind Starter 9
4.3 Chain Lubrication 10
4.4 Ignition System 11
4.5 Carburetor 12
4.6 Engine 14
5. Clutch, Chain Drive,
Chain Brake and
Chain Tensioner 15
5.1 Clutch Drum / Chain
Sprocket 15
5.2 Chain Catcher 16
5.3 Clutch 16
5.4 Chain Brake 18
5.4.1 Checking Operation 18
5.4.2 Removing 19
5.4.3 Installing 20
5.5 Front Chain Tensioner 22
5.6 Side Chain Tensioner 22
6. Engine 23
6.1 Muffler/Spark
Arresting Screen 23
6.2 Leakage Test 24
6.2.1 Preparations 24
6.2.2 Pressure Test 25
6.2.3 Vacuum Test 26
6.3 Oil Seals 26
6.4 Removing and
Installing 28
6.5 Cylinder 29
6.6 Piston 31
6.7 Piston Rings 33
6.8 Crankshaft 33
6.9 Decompression Valve 34
7. Ignition System 34
7.1 Spark Plug Boot 35
7.2 Ignition Module 35
7.3 Testing the
Ignition Coil 36
7.4 Checking the
Wiring Harness 36
7.4.1 Ignition Timing 37
7.4.2 Removing and
Installing 37
7.5 Flywheel 38
7.6 Ignition System
Troubleshooting 39
8. Rewind Starter 42
8.1 General 42
8.2 Removing and
Installing 42
8.3 Rope Rotor 42
8.4 Segment 44
8.5 Starter Rope 44
8.5.1 Elastostart 45
8.5.2 Tensioning 46
8.6 Rewind Spring 47
8.7 Pawl 48
9. AV Handle System/
Handle Housing 48
9.1 Annular Buffers 48
9.2 Front Handle 49
9.3 Handle Housing 50
9.4 Switch Shaft 52
9.5 Contact Spring 52
9.6 Throttle Trigger/
Interlock Lever 53
10. Chain Lubrication 54
10.1 Pickup Body 54
10.2 Connector/
Suction Hose 55
10.3 Valve 55
10.4 Worm 56
10.5 Oil Pump 57
11. Fuel System 58
11.1 Air Filter 58
11.2 Carburetor 59
11.2.1 Leakage Test 59
11.2.2 Removing and
Installing 60
11.2.3 Adjusting
(Carburetor
without Limiter Cap) 61
11.2.4 Adjusting
(Carburetor with
Limiter Cap) 62
11.2.5 Standard Setting
(Carburetor with
Limiter Cap) 62
11.3 Tank Vent 63
11.4 Pickup Body 64
11.5 Suction Hose 64
11.6 Manual Fuel Pump 65
11.7 Hoses 65
11.8 Fuel Tank 67
12. Special Servicing
Tools 69
13. Servicing Aids 71

Stihl MS 230 Specifications

General

Brand	Stihl
Model	MS 230
Category	Chainsaw
Language	English