Contents
7.1
Compression Pressure Checking / Adjusting Valve Clearances Rocker Arms / Pushrods Cam Followers Cam Gear Decompression System Muffler / Spark Arresting Screen Clutch Removing and Disassembling Assembling and Installing Clutch Drum Clutch Drum Bearing Flywheel Crankshaft Replacing the Oil Seals Crankcase, Lower Half Crankshaft Piston Piston Rings Valves / Valve Springs Upper Half of Crankcase with Cylinder
7.2 3
Specifications
4
7.3
3.1 3.2 3.3 3.4
Engine Spark Plug Carburetor Tightening Torques
4 4 4 5
7.4 7.5 7.5.1 7.6
4
Troubleshooting
6
4.1 4.2 4.3 4.4 4.5
Clutch Rewind Starter Ignition System Carburetor Engine
6 7 8 9 11
5
Rewind Starter / Shroud
13
7.7 7.7.1 7.7.2 7.7.3 7.7.4 7.8 7.9 7.9.1 7.9.2
17 17
6
Fuel System
18
6.1 6.2 6.2.1 6.2.2
Air Filter Carburetor Leakage Test Removing and Installing Servicing the Carburetor Manual Fuel Pump Metering Diaphragm Inlet Needle Fixed Jet Pump Diaphragm Adjusting Idle Speed Factory Setting Tank Vent Pickup Body Fuel Hoses Fuel Tank
18 18 18
5.3 5.4 5.4.1 5.5 5.6
13 13 13 15 16 17
7.9.3 7.9.4 7.9.5 7.10 7.11
n
5.7
General Removing and Installing Rope Rotor Starter Rope Tensioning Pawl Replacing the Rewind Spring Removing the Shroud
sio
5.1 5.2
27
12
Special Servicing Tools
29 30 30 31 31 32 32 33 34 35 35 36 36
38 39 40 42 42
43
44
Spark Plug Boot Ignition Module Ignition Timing Removing and Installing
44 45 45 45
9
Throttle Control
46
9.1
9.4
Throttle Trigger, Interlock Lever Tensioner Adjusting Throttle Cable Slide Control
48 48
10
AV System
49
ev
8.1 8.2 8.2.1 8.2.2
51
27
19
lin
6.3.1 6.3.2 6.3.3 6.3.4 6.3.5 6.3.6 6.3.7 6.4 6.5 6.6 6.7
On
6.3
Special Accessories 50
Ignition System
er
8
11
rin t
3
27
ep
Safety Precautions
Engine
rr
2
7
fo
2
ot
Introduction
-n
1
20 20 21 21 22 22 23 24 25 25 26 26
9.2 9.3
46 48
Š 2002 Andreas Stihl AG & Co., Waiblingen
Series 4180 Powerhead
1