STIH)
STIHL MS 650, 660
2007-09
1
MS 650, MS 660
q
© ANDREAS STIHL AG & Co. KG, 2007
Contents
1.
Introduction
3
2.
Safety Precautions
4
3.
Specifications
5
3.1
Engine
5
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
10
4.3
Chain Lubrication
11
4.4
Ignition System
12
4.5
Carburetor
14
4.6
Engine
17
5.
Clutch, Chain Drive,
Chain Brake and
Chain Tensioner
18
5.1
Clutch Drum /
Chain Sprocket
18
5.2
Replacing the
Chain Catcher
19
5.3
Spiked Bumper
19
5.4
Clutch
20
5.5
Chain Brake
22
5.5.1
Checking Operation
22
5.5.2
Removing
22
5.5.3
Installing
24
5.6
Chain Tensioner
27
5.7
Bar Mounting Studs
28
6.
Engine
28
6.1
Muffler/Spark Arresting
Screen
28
6.2
Shroud
29
6.3
Leakage Test
30
6.3.1
Preparations
30
6.3.2
Vacuum Test
31
6.3.3
Pressure Test
32
6.4
Oil Seals
32
6.5
Cylinder and Piston
34
6.5.1
Removing
34
6.5.2
Installing
36
6.6
Piston Rings
39
6.7
Crankcase/
Crankshaft
40
6.7.1
Removing the
Crankshaft
40
6.7.2
Installing the
Crankshaft
43
6.8
Decompression Valve 47
7.
Ignition System
48
7.1
Ignition Module
48
7.2
Ignition Timing
48
7.2.1
Removing and
Installing
49
7.2.2
Testing the
Ignition Module
50
7.2.3
Spark Plug Boot/
Ignition Lead
51
7.3
Flywheel
52
7.3.1
Removing
52
7.3.2
Installing
53
7.4
Contact Spring
53
7.5
Testing
Wiring Harness
54
7.6
Ignition System
Troubleshooting
55
8.
Rewind Starter
58
8.1
General
58
8.2
Removing and
Installing
58
8.3
Pawls
58
8.4
Rope Rotor
59
8.5
Starter Rope / Grip
59
8.6
Tensioning
the Rewind Spring
60
8.7
Segment
61
8.8
Starter Rope Guide
Bushing
61
8.9
Replacing the
Rewind Spring
62
9.
AV System
63
9.1
Annular Buffers between
Crankcase and
Tank Housing
63
9.2
Annular Buffer at top
of Tank Housing
64
10.
Master Control /
Handle System
65
10.1
Switch Shaft
65
10.2
Throttle Trigger /