Stihl SR 430 User Manual

1SR 430, SR 450
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© ANDREAS STIHL AG & Co. KG, 2009
RA_454_00_01_01
1. Introduction and
Safety Precautions 3
1.1 Introduction 3
1.2 Safety Precautions 4
2. Specifications 5
2.1 Engine 5
2.2 Fuel System 5
2.3 Ignition System 5
2.4 Tightening Torques 6
3. Troubleshooting 8
3.1 Rewind Starter 8
3.2 Blower 9
3.3 Ignition System 10
3.4 Carburetor 12
3.5 Engine 15
4. Engine 16
4.1 Muffler / Spark
Arresting Screen 16
4.2 Leakage Test 17
4.2.1 Preparations 17
4.2.2 Vacuum Test 18
4.2.3 Pressure Test 18
4.3 Oil Seals 19
4.4 Shroud 19
4.5 Engine 20
4.6 Cylinder / Crankshaft 22
4.7 Bearings / Crankshaft 25
4.8 Piston 26
4.8.1 Piston Rings 29
5. Ignition System 30
5.1 Ignition Timing 30
5.2 Ignition Module 30
5.3 Testing
the Ignition Module 32
5.4 Spark Plug Boot 33
5.5 Flywheel 34
5.6 Short Circuit Wire 35
5.6.1 Testing 35
5.6.2 Removing and
Installing 35
5.6.3 Ground Wire 38
5.7 Ignition System
Troubleshooting 39
6. Rewind Starter 42
6.1 General 42
6.2 Starter Cover 42
6.3 Pawl 42
6.4 Rope Rotor 43
6.5 Starter Rope / Grip 44
6.6 Tensioning the
Rewind Spring 45
6.7 Replacing the
Rewind Spring 46
7. Servicing the
AV System 48
7.1 AV Springs at Rear
of Backplate 48
7.2 AV Springs at Bottom
of Backplate 49
7.3 AV Springs on
Backplate, Metering
Unit, SR 450 49
7.4 Stop Buffer on Filter
Housing 50
7.5 Stop Buffer on Shroud 50
8. Control Levers 51
8.1 Switch Positions 51
8.2 Setting Lever 51
8.3 Throttle Trigger/
Interlock Lever 52
8.4 Valve Lever 55
8.5 Metering Lever,
SR 450 56
8.5.1 Adjusting the Cable 57
9. Fuel System 58
9.1 Air Filter 58
9.2 Baffle 58
9.3 Air Guide Shroud 59
9.4 Filter Housing 59
9.5 Removing and Installing
the Carburetor 62
9.5.1 Leakage Test 63
9.6 Servicing
the Carburetor 64
9.6.1 Metering Diaphragm 64
9.6.2 Inlet Needle 65
9.6.3 Fixed Jet 66
9.6.4 Pump Diaphragm 66
9.6.5 Throttle Lever 67
9.6.6 Rotary Knob 68
9.6.7 Adjusting Screws 69
9.7 Adjusting the
Carburetor 70
9.7.1 Basic Setting 70
9.7.2 Standard Setting 71
9.8 Throttle Cable 72
9.8.1 Adjusting the Throttle
Cable 72
9.9 Spacer Flange 73
9.10 Tank Vent 74
9.10.1 Testing 74
9.10.2 Removing and
Installing 75
9.10.3 Manual Fuel Pump 75
9.11 Fuel Intake 76
9.11.1 Pickup Body 76
9.11.2 Fuel Hoses 77
9.11.3 Connector 79
9.12 Fuel Tank 80
9.12.1 Fuel Tank Cap 81
Contents

Stihl SR 430 Specifications

General

Product type	Backpack garden sprayer
Product color	Black, Orange, White
Tank capacity	14 L

Weight and Dimensions

Weight	12200 g