Stihl 4141 Series, Manual

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1 Series 4141 Powerhead
© 2000 Andreas Stihl AG & Co., Waiblingen
1 Introduction 2
2 Safety Precautions 3
3 Specifications 4
3.1 Engine 4
3.2 Ignition System 4
3.3 Fuel System 4
3.4 Tightening Torques 5
4 Cutch 7
4.1 Removing 7
4.2 Installing 8
4.3 Replacing the
Clutch Drum
8
4.3.1 Replacing Bearings 9
4.4 Clutch Spring 10
5 Engine 10
5.1 Removing Shroud 10
5.2 Exhaust Muffler/Spark
Arresting Screen
11
5.3 Leakage Test 12
5.3.1 Pressure Test 12
5.3.2 Vacuum Test 13
5.4 Replacing the Oil
Seals
14
5.5 Replacing/Sealing
Components of Mixture
Supply System
16
5.6 Cylinder and Piston 17
5.6.1 Removing 17
5.6.2 Installing 18
5.7 Piston Rings 20
5.8 Crankcase 20
5.8.1 Removing the
Crankshaft
20
5.8.2 Replacing the Main
Bearings
21
5.8.3 Installing the
Crankshaft
23
6 Ignition System 24
6.1 Spark Plug Boot 24
6.2 Ignition Module 25
6.2.1 Ignition Timing 25
6.2.2 Removing and
Installing
26
6.3 Flywheel 26
7 Rewind Starter 27
7.1 General 27
7.2 Removing and
Installing the Rewind
Starter
28
7.3 Starter Cup 28
7.4 Rewind Spring 28
7.4.1 Replacing 28
7.4.2 Tensioning 30
7.5 Starter Rope 30
8 Throttle Control 31
8.1 Throttle Trigger/
Interlock Lever
31
8.2 Replacing the
Throttle Cable
32
8.3 Adjusting the
Throttle Cable
32
9 Fuel System 33
9.1 Air Filter 33
9.2 Carburetor 34
9.2.1 Leakage Test 34
9.3 Removing and
Installing the
Carburetor
35
9.4 Servicing the
Carburetor
35
9.5 Adjusting the
Carburetor
37
9.6 Tank Vent 38
9.7 Pickup Body 38
9.8 Fuel Tank/Fuel Hoses 39
9.8.1 Fuel Tank 39
9.8.2 Fuel Hoses 39
10 Special Servicing
Tools
40
11 Servicing Aids 41
12 Special Accessories 41
CONTENTS