Stihl FS 80 Service Manual

1FC 75, FC 85, FH 75, FS 75, FS 80, FS 85, HL 75, KM 85, KW 85
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© ANDREAS STIHL AG & Co. KG, 2004
Contents
1. Introduction 2
2. Safety Precautions 3
3. Specifications 4
3.1 Fuel System 4
3.2 Tightening Torques 5
4. Troubleshooting 8
4.1 Clutch 8
4.2 Rewind Starter 9
4.3 Fuel System 10
4.4 Engine 12
5. Engine 13
5.1 Shroud 13
5.2 Clutch 13
5.2.1 Removing and
Installing 13
5.2.2 Clutch Drum 15
5.3 Muffler/Spark Arresting
Screen 16
5.4 Removing and Installing
the Engine 17
6. Rewind Starter 17
6.1 General 17
6.2 Removing and
Installing 18
6.3 Rope Rotor/Rewind
Spring 19
6.3.1 Tensioning 20
6.4 Starter Rope 21
6.5 Starter Grip 21
6.6 Carrier/Pawl 22
7. AV System 23
7.1 Repair 23
8. Throttle Control 26
8.1 Control Handle on Loop
Handle up to 1997 26
8.1.1 Throttle Trigger /
Interlock Lever 26
8.1.2 Detent/Torsion Spring 27
8.1.3 Throttle Cable 28
8.2 Control Handle
up to 2002 28
8.2.1 Throttle Trigger/Interlock
Lever 28
8.2.2 Slide Control 29
8.2.3 Throttle Cable 30
8.3 Control Handle
from 2002 31
8.3.1 Throttle Trigger/Interlock
Lever 31
8.3.2 Contact/Detent Spring 32
8.3.3 Throttle Cable 33
8.4 Adjusting the Throttle
Cable 33
8.5 Control Handle on Bike
Handle up to 1997 34
8.5.1 Throttle Trigger/Interlock
Lever 34
8.5.2 Contact / Detent
Spring 35
8.5.3 Throttle Cable 36
8.6 Control Handle on Bike
Handle up to 2002 37
8.6.1 Throttle Trigger/Interlock
Lever 37
8.6.2 Contact / Detent
Spring 38
8.6.3 Throttle Cable 38
8.7 Control Handle on Bike
Handle from 2002 40
8.7.1 Throttle Trigger/Interlock
Lever 40
8.7.2 Contact/Detent Spring 41
8.8 Adjusting the Throttle
Cable 42
9. Fuel System 42
9.1 Air Filter 42
9.2 Carburetor 43
9.2.1 Leakage Test 43
9.2.2 Removing and
Installing 44
9.2.3 Spacer Flange 45
9.3 Servicing the
Carburetor 46
9.3.1 Flange Mounting
with Oval End Cover 46
9.3.2 Flange Mounting with
Square End Cover 47
9.3.3 Metering Diaphragm 47
9.3.4 Inlet Needle 48
9.3.5 Fixed Jet 48
9.3.6 Pump Diaphragm 49
9.4 Adjusting the
Carburetor 49
9.4.1 Carburetor with Two
Adjusting Screws 49
9.4.2 Carburetor with
LD Screw 50
9.4.3 User Adjustment,
Carburetor with
Limiter Cap 51
9.4.4 Service Adjustment,
Carburetor with
Limiter Cap 52
9.5 Tank Vent 54
9.6 Pickup Body 55
9.7 Fuel Tank/
Fuel Hoses 55
10. Drive Tube 57
10.1 Bike Handle 57
10.2 Loop Handle 57
10.2.1 Loop Handle with
Barrier Bar 57
10.2.2 Loop Handle without
Barrier Bar 58
10.2.3 Loop Handle with
Handle Hose 58
10.3 Drive Shaft/Flexible
Liner 59
10.3.1 Drive Shaft in Upper
End of Drive Tube
(KM 85 only) 60
10.4 Drive Tube 62
10.4.1 FS 80, 85, FH 75,
HL 75 62
10.4.2 Split Drive Tube
(KM 85 only) 63
10.5 Bearing Housing
(FS 75 only) 64
11. Special Sevicing
Tools 66
12. Servicing Aids 67

Stihl FS 80 Specifications

General

Brand	Stihl
Model	FS 80
Category	Trimmer
Language	English