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SR 450
Stihl SR 450 User Manual
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ST
I
H)
STIHL SR 430, 450
2009-0
6
2
Table of Contents
Default Chapter
2
Table of Contents
2
1 Introduction and Safety Precautions
4
Introduction
4
Safety Precautions
5
2 Specifications
6
Engine
6
Fuel System
6
Ignition System
6
Tightening Torques
7
3 Troubleshooting
9
Rewind Starter
9
Blower
10
Ignition System
11
Carburetor
13
Engine
16
4 Engine
17
Arresting Screen
17
Leakage Test
18
Preparations
18
Vacuum Test
19
Pressure Test
19
Oil Seals
20
Shroud
20
Engine
21
Cylinder / Crankshaft
23
Bearings / Crankshaft
26
Piston
27
Piston Rings
30
5 Ignition System
31
Ignition Timing
31
Ignition Module
31
Testing
31
The Ignition Module
33
Spark Plug Boot
34
Flywheel
35
Short Circuit Wire
36
Testing
36
Removing and Installing
36
Ground Wire
39
Ignition System Troubleshooting
40
6 Rewind Starter
43
General
43
Starter Cover
43
Pawl
43
Rope Rotor
44
Starter Rope / Grip
45
Tensioning the
46
Replacing the
47
7 Servicing the AV System
49
AV Springs at Rear
49
AV Springs at Bottom
50
Of Backplate
50
AV Springs on
50
Unit, SR
50
Stop Buffer on Filter Housing Stop Buffer on Shroud
51
8 Control Levers
52
Switch Positions
52
Setting Lever
52
Throttle Trigger/Interlock Lever
53
Valve Lever
56
Metering Lever, SR
57
Adjusting the Cable
58
9 Fuel System
59
Air Filter
59
Baffle
59
Air Guide Shroud
60
Filter Housing
60
Removing and Installing the Carburetor
63
Leakage Test
64
Servicing the Carburetor
65
Metering Diaphragm
65
Inlet Needle
66
Fixed Jet
67
Pump Diaphragm
67
Throttle Lever
68
Rotary Knob
69
Adjusting Screws
70
Adjusting the Carburetor
71
Basic Setting
71
Standard Setting
72
Throttle Cable
73
Adjusting the Throttle Cable
73
Spacer Flange
74
Tank Vent
75
Testing
75
9.10.2 Removing and Installing
76
9.10.3 Manual Fuel Pump
76
Fuel Intake
77
9.11.1 Pickup Body
77
9.11.2 Fuel Hoses
78
9.11.3 Connector
80
Fuel Tank
81
9.12.1 Fuel Tank Cap
82
10 Blower and Metering Attachment
83
Container, SR
83
Metering Unit
85
Cable, SR 450
88
Pressure Pump
90
Blower Wheel
91
Blower Housing, SR
96
Nozzle / Valve
99
10.9.1 Nozzle
99
10.9.2 Valve
100
Blower Tube
102
10.10.1 Pleated Hose
102
10.10.2 Elbow
102
10.10.3 Hoses
103
11 Backplate
104
Backplate, SR
104
Harness
106
Back Padding
107
12 Special Servicing Tools
108
13 Servicing Aids
110
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Instruction Manual
96 pages
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Stihl SR 450 Specifications
General
Product type
Backpack garden sprayer
Product color
Black, Orange, White
Tank capacity
14 L
Weight and Dimensions
Weight
12800 g
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General
Weight and Dimensions
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