Chapter 7: Ignition System.................................................................................................. 50
Troubleshooting the ignition system................................................................................. 50
Stop switch ........................................................................................................................51
Remote (ignition) stop switch ...........................................................................................52
The module .......................................................................................................................53
Module removal ................................................................................................................54
Installing the module and setting the air gap ....................................................................55
Flywheel ............................................................................................................................55
About the spark plug .........................................................................................................56
Cleaning the spark plug ....................................................................................................56
Inspection of the spark plug ..............................................................................................56
Spark plug removal ...........................................................................................................57
Chapter 8: Exhaust.............................................................................................................. 58
Summer engines ................................................................................................................58
Spark arrestor ....................................................................................................................58
To remove/replace the muffler ......................................................................................... 59
Snow engines.................................................................................................................... 60
Chapter 9: Cylinder Head ....................................................................................................61
Valves ...............................................................................................................................64
Push rod bushings .............................................................................................................66
Chapter 10: Crankshaft, piston and Connecting Rod .......................................................67
Crank shaft inspection ......................................................................................................69
Piston Inspection ...............................................................................................................70
Connecting rod inspection ................................................................................................71
Cylinder inspection ...........................................................................................................71
Bearings ............................................................................................................................72
Reassembly .......................................................................................................................73
Engine specifications chart............................................................................................... 76
Engine torque values chart ................................................................................................77
Chapter 11: Failure Analysis ...............................................................................................78
Abrasive Ingestion ............................................................................................................78
Insufficient lubrication...................................................................................................... 80
Engine Overspeed .............................................................................................................81
Overheated........................................................................................................................ 82
Mechanical Breakage/ Wear............................................................................................. 83
Detonation/preignition ......................................................................................................83
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