Stihl MS 261 C User Manual

1MS 261, MS 261 C
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© ANDREAS STIHL AG & Co. KG, 2010
RA_573_0_01_02
1. Introduction and
Safety Precautions 3
1.1 Introduction 3
1.2 Safety Precautions 4
2. Specifications 5
2.1 Engine 5
2.2 Fuel System 5
2.3 Ignition System 5
2.4 Chain Lubrication 5
2.5 Tightening Torques 6
3. Troubleshooting 8
3.1 Clutch 8
3.2 Chain Drive,
Chain Brake,
Chain Tensioner 9
3.3 Chain Lubrication 11
3.4 Rewind Starter 12
3.5 Ignition System 14
3.6 Carburetor 15
3.7 Engine 18
4. Clutch 19
4.1 Clutch Drum 20
5. Chain Brake 21
5.1 Checking Operation 21
5.2 Brake Band 21
5.3 Brake Lever 23
5.4 Brake lever on
machines with
QuickStop Super 25
5.4.1 Adjusting the
brake cable 27
5.4.2 Brake cable 28
5.5 Cam Lever 29
5.6 Pins 30
5.7 Chain Tensioner 32
5.7.1 Quick chain tensioner 32
5.8 Bar Mounting Studs 33
5.9 Collar Nuts for
Sprocket Cover 34
6. Engine 35
6.1 Muffler 35
6.2 Leakage Test 36
6.2.1 Preparations 36
6.2.2 Vacuum Test 37
6.2.3 Pressure Test 37
6.3 Oil Seals 38
6.4 Shroud 39
6.5 Cylinder 40
6.6 Crankshaft 42
6.6.1 Bearings / Crankcase 47
6.7 Piston 48
6.8 Piston Rings 50
6.9 Decompression Valve 51
7. Ignition System 52
7.1 Ignition Timing 52
7.2 Preseparator 52
7.3 Install new
Ignition Module 52
7.4 Testing the
Ignition Module 54
7.5 Spark Plug Boot /
Ignition Lead 56
7.6 Flywheel 57
7.7 Short Circuit Wire 58
7.7.1 Testing 58
7.7.2 Removing and
Installing 58
7.7.3 Ground Wire 62
7.7.4 Contact Spring 62
7.8 Ignition System
Troubleshooting 64
8. Rewind Starter 67
8.1 General 67
8.2 Fan housing 67
8.3 Pawls 68
8.4 ErgoStart 69
8.5 Rope Rotor 70
8.6 Starter Rope / Grip 71
8.7 Tensioning the
Rewind Spring 73
8.8 Replacing the
Rewind Spring 73
9. Servicing the
AV System 76
9.1 Buffer on Oil Tank 76
9.2 AV Spring on
Oil Tank 76
9.2.1 AV Spring on Oil Tank -
Machines with
Heating 76
9.3 AV Spring on
Fuel Tank 77
9.4 AV Spring on
Handlebar 78
9.4.1 Models with Heating 79
9.5 Stop Buffer at
Clutch Side 79
9.5.1 Stop Buffer at
Ignition Side 80
9.5.2 Buffers on Filter Base 80
9.6 Handlebar 81
9.6.1 Handlebar with
Heating 82
10. Control Levers 87
10.1 Master Control Lever 87
10.1.1 Removing and
Installing 87
10.2 Throttle Trigger/
Lockout Lever 87
10.3 Throttle Trigger/
Lockout Lever –
QuickStop Super 89
10.3.1 Switch Lever –
QuickStop Super 91
10.3.2 Lockout Lever –
QuickStop Super 91
10.3.3 Choke Rod 92
10.3.4 Throttle Rod 93
11. Chain Lubrication 95
11.1 Pickup Body 95
11.2 Oil Suction Hose 95
11.3 Oil Pump 96
11.4 Valve 97
Contents

Stihl MS 261 C Specifications

General

Brand	Stihl
Model	MS 261 C
Category	Chainsaw
Language	English