STIH)
STIHL MS 780, 880
2009-08
1
MS 780, MS 880
q
© ANDREAS STIHL AG & Co. KG, 2009
RA_550_00_01_021.
Introduction
3
2.
Safety Precautions
5
3.
Specifications
6
3.1
Engine
6
3.2
Fuel System
6
3.3
Ignition System
6
3.4
Chain Lubrication
6
3.5
Tightening Torquese
7
4.
Troubleshooting
9
4.1
Clutch
9
4.2
Chain Drive, Chain Brake,
Chain Tensioner
10
4.3
Chain Lubrication
11
4.4
Rewind Starter
12
4.5
Ignition System
13
4.6
Carburetor
15
4.7
Engine
18
5.
Saw Chain /
Guide Bar
19
5.1
Spiked Bumper / Chain
Catcher
19
6.
Clutch
20
6.1
Clutch Drum
22
7.
Chain Brake
23
7.1
Checking Operation
23
7.2
Removing and Installing
the Brake Band
23
7.3
Brake Lever
25
7.4
Cam Lever
26
7.5
Pins
27
7.6
Chain Tensioner
28
7.7
Bar Mounting Studs
29
8.
Engine
30
8.1
Muffler with Spring Clip/
Spark Arresting
Screen
30
8.2
Screw Mounted Muffler /
Spark Arresting
Screen
32
8.3
Leakage Test
34
8.3.1
Preparations
34
8.3.2
Vacuum Test
36
8.3.3
Pressure Test
36
8.4
Oil Seals
37
8.5
Carburetor Box Cover 38
8.6
Removing and Installing
the Shroud
39
8.7
Cylinder
40
8.8
Crankshaft
43
8.8.1
Removing and
Installing
43
8.8.2
Bearings / Crankcase 48
8.9
Piston
50
8.9.1
Removal
50
8.9.2
Installing
51
8.10
Piston Rings
52
8.11
Decompression Valve 53
9.
Ignition System
54
9.1
Ignition Timing
54
9.2
Ignition Module
54
9.2.1
Removing and Installing
– Version with two
mounting screws
54
9.2.2
Removing and Installing
– Version with three
mounting screws
56
9.3
Testing the Ignition
Module
59
9.4
Spark Plug Boot /
Ignition Lead
60
9.5
Flywheel
61
9.6
Short Circuit Wire
63
9.6.1
Testing
63
9.6.2
Removing and Installing
– Version with three
mounting screws
63
9.6.3
Removing and Installing
– Version with cable
channel
66
9.6.4
Ground Wire
68
9.6.5
Contact Spring
69
9.7
Ignition System
Troubleshooting
70
10.
Rewind Starter
73
10.1
General
73
10.2
– Removing and
Installing
73
10.3
Pawls
74
10.4
Rope Rotor
74
10.5
Starte