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WM 90
Wacker Neuson WM 90 User Manual
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WM 90
Technical Data
wc_td000143gb.fm
23
3.
Technical Data
3.1
Specifications
Engine Model
WM 90
Engine
Engine Speed - full
r
pm
4200 ± 100
Engine Speed - idle
r
pm
2000 ± 100
Clutch Engagement
r
pm
2500 ± 100
Spark Plug
type
NGK BM4A or BMR4A
Electrode Gap
mm (in)
0.6–0.7 (0.
023–0.028
)
Cylinder Head
Compression (cold)
(kg/cm
2
)
psi
8.0–9.7 (120–
140)
Air Cleaner
type
Three-stage with
cyclonic precleaner
Engine Lubrication
oil grade
SAE 10W30
SE, SF or higher
Engine Oil Capacity
ml (oz.)
300 (10)
Cooling System
type
F
orced air
Ignition system
type
Solid-state
, flywhee
l magneto
Star
ting system
type
Recoil star
ter
Gov
ernor system
type
Centr
ifugal flyweight
22
24
Table of Contents
Default Chapter
5
Table of Contents
5
1 Emission Control System Information
8
2 Safety Information
13
Operating Safety
14
Operator Safety While Using Internal Combustion Engines
15
Service Safety
16
Label Locations
17
Safety Labels
18
Operating Labels
21
3 Technical Data
23
Specifications
23
Performance
24
4 Theory of Operation
25
Application
25
Recommended Fuel
25
Before Starting
25
To Start
26
To Stop
27
Component Descriptions
27
Cross Section Across Shaft
32
Cross Section Across Shaft Components
33
Cross Section Along Shaft
34
Cross Section Along Shaft Components
35
5 Maintenance
36
Periodic Maintenance Schedule
36
Servicing Air Cleaner
37
Servicing Fuel Filter and Fuel Tank
38
Long-Term Storage
39
6 Dissassembly/Reassembly General Information
40
Tools
40
Ordering Parts
40
Reference Numbers ( )
40
Weight Block
40
7 Disassembly Procedures
41
Removing Engine from Rammer
41
Draining Oil
43
Removing Recoil Starter and Blower Housing
44
Removing Muffler
45
Removing Governor Lever, Carburetor, Speed Control Lever
46
Removing Ignition Coil, Flywheel, and Spark Plug
47
Removing Rocker Cover and Cylinder Head
48
Removing Bearing Cover
49
Removing Camshaft and Tappets
50
Removing Connecting Rod and Piston
51
Removing Crankshaft
52
Removing Intake and Exhaust Valves
53
8 Reassembly Procedures
54
Notes on Reassembly
54
Crankshaft
54
Reassembling Piston
55
Reassembling Piston and Connecting Rod
56
Installing Piston
57
Installing Tappets and Camshaft
58
Adjusting Crankshaft End Play
59
Installing Main Bearing Cover
60
Cylinder Head
61
Reassembling Rocker Arms and Push Rods
62
Adjusting Valve Clearances
63
Installing Rocker Cover and Spark Plug
64
Installing Flywheel Magneto
65
Installing Ignition Coil
65
Installing Governor, Speed Control System, and Carburetor
66
Adjusting Governor System
67
Installing Muffler
67
Installing Blower Housing and Recoil Starter
68
Re-Installing Engine
69
Break-In Operation
71
9 Sub Systems
72
Magneto
72
Engine Basic Electric Theory
72
Electrical Components
73
Automatic Decompression System
74
Diaphragm-Type Carburetor
75
Carburetor Disassembly Procedure
78
Carburetor Inspection
79
Carburetor Reassembly
79
Carburetor Adjustments
80
10 Recoil Starter
81
Recoil Starter Disassembly
81
Checking the Recoil Starter after Reassembly
85
Starter Assembly Exploded View
86
Disassembling the Starter
87
Inspecting the Starter
87
Assembling the Starter
88
Replacing the Starter Rope
89
11 Clearance Data and Limits Table
91
Term Descriptions
91
12 Troubleshooting
99
Troubleshooting Introduction
99
Troubleshooting Procedures
99
Torque Values
105
5
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Wacker Neuson WM 90 Specifications
General
Brand
Wacker Neuson
Model
WM 90
Category
Engine
Language
English
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