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Contents
Part I Introduction ..................................................................................................................................2
1-1 Components of general-gasoline engine ....................................................................................... 2
1-2 Parameters...................................................................................................................................3
1-3 Maintenance limit ..................................................................................................................... 3
Part II Dimension and Torque....................................................................................................................5
2-1 Dimensions of general-purpose gasoline engine ........................................................................... 5
2-2 Locations of mounting holes........................................................................................................6
2-3 PTO installation drawing .............................................................................................................6
2-4 Torque parameters .......................................................................................................................7
2-5 Standard torque parameters..........................................................................................................7
Part III Maintenance...............................................................................................................................8
3-1 Maintenance list...........................................................................................................................8
3-2 Oil...............................................................................................................................................9
3-3 Air filter..................................................................................................................................... 10
3-4 Spark plug ................................................................................................................................. 11
3-5 Adjustment of valve clearance.................................................................................................... 13
3-6 Governor ................................................................................................................................... 14
Part IV Disassembly and Maintenance..................................................................................................... 15
4-1 Troubleshooting......................................................................................................................... 15
4-1-1 Start difficulty................................................................................................................. 15
4-1-2 Underpowered................................................................................................................. 16
4-1-3 Unstable speed................................................................................................................ 17
4-1-4 Unable to Ignite .............................................................................................................. 18
4-1-5 Overheating of general-purpose gasoline engine.............................................................. 18
4-1-6 Abnormal sound.............................................................................................................. 19
4-2 Pre-maintenance Preparations .................................................................................................... 19
4-2-1 Safety factors.................................................................................................................. 19
4-2-2 Special tools.................................................................................................................... 21
4-3 Disassembly chart...................................................................................................................... 22
4-4 general-purpose gasoline engine................................................................................................. 22
4-4-1 Muffler ........................................................................................................................... 22
4-4-2 Air filter.......................................................................................................................... 23
4-4-4 Carburetor....................................................................................................................... 26
4-4-5 Flywheel......................................................................................................................... 30
4-4-6 Ignition coil detection...................................................................................................... 31
4-4-7 Charging coil detection ................................................................................................... 32
4-4-8 Voltage regulating rectifier.............................................................................................. 33
4-4-9 Cylinder head/valve ........................................................................................................ 34
4-4-10 Crankshaft/Piston.......................................................................................................... 40
4-5 Electrical schematic diagram...................................................................................................... 48
