Contents
Part I Introduction ......................................................................................................................1
1-1 Engine components.......................................................................................................1
1-1-1 Structural features......................................................................................................1
1-1-2 Gasoline engine model and No..................................................................................2
1-2 Product parameters........................................................................................................2
1-3 Service standards ..........................................................................................................3
Part II Maintenance....................................................................................................................4
2-1 Maintenance list............................................................................................................4
2-2 Oil ................................................................................................................................. 4
2-3 Air filter.........................................................................................................................5
2-4 Spark plug.....................................................................................................................6
2-5 Adjustment of valve clearance...................................................................................... 7
2-6 Governor .......................................................................................................................9
Part III Fault Judgement and Repair ........................................................................................10
3-1 Fault judgement ..........................................................................................................10
3-1-1 Start difficulty..........................................................................................................10
3-1-2 Underpower............................................................................................................. 11
3-1-3 Unstable speed.........................................................................................................12
3-1-4 Unable to ignite .......................................................................................................12
3-1-5 Overheating of general-purpose gasoline engine ....................................................13
3-1-6 Abnormal sound....................................................................................................... 13
3-1-7 Failure of power generation of the generator ..........................................................13
3-2 Pre-maintenance preparations.....................................................................................14
3-2-1 Safety factors...........................................................................................................14
3-2-2 Special tools.............................................................................................................15
3-3 Disassembly chart.......................................................................................................16
3-4 Gasoline engine...........................................................................................................16
3-4-1 Air director............................................................................................................... 16
3-4-2 Impeller/flywheel/ignition coil/charging coil..........................................................17
3-4-3 Air filter ................................................................................................................... 20
3-4-4 Gasoline pump and carburetor.................................................................................20
3-4-5 Cylinder head/valve.................................................................................................26
3-4-6 Muffler.....................................................................................................................31
