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Chapter 1: Introduction
Professional Service Manual Intent ................................................................... 1
Safety .................................................................................................................1
Fasteners ...........................................................................................................3
Assembly instructions ........................................................................................3
Model and serial number ................................................................................... 5
Maintenance ......................................................................................................5
Spark plugs ........................................................................................................6
Air filter ...............................................................................................................7
Oil type and capacity .........................................................................................8
Changing the oil ...............................................................................................10
Fuel system .....................................................................................................11
Servicing the fuel system .................................................................................11
Fuel filter ..........................................................................................................12
Valve lash ........................................................................................................13
Exhaust system ...............................................................................................15
Cleaning the engine .........................................................................................15
General torque specifications ..........................................................................15
Definitions ........................................................................................................17
Chapter 2: Basic Troubleshooting
Introduction ......................................................................................................17
Steps to troubleshooting ..................................................................................17
Define the problem ..........................................................................................17
Identify factors that could cause the problem ..................................................18
Repairing the problem .....................................................................................22
Prime test .........................................................................................................23
Leak-down test ................................................................................................24
Compression test .............................................................................................26
PCV testing ......................................................................................................27
Chapter 3: Air Intake System
Air filter............................................................................................................. 29
Paper filter with a thumb screw ........................................................................29
Paper filter with a snap fit door ........................................................................29
Paper air filter housings................................................................................... 30
Foam air filter ...................................................................................................30
Foam air filter housing ..................................................................................... 31
Carburetor Insulator .........................................................................................33
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