Workshop manual
3
1. Parameters................................................................................................................................ 4
1.1 Engine Structure ........................................................................................................................... 4
1.2 Product Technical Parameters ...................................................................................................... 6
1.3 Drawings of Mounting Dimensions................................................................................................ 7
1.4 Drawings of PTO Dimensions ....................................................................................................... 8
1.5 Diagram of Electrical Wiring........................................................................................................ 10
2. Service information................................................................................................................ 12
2.1 Precautions for Maintenance....................................................................................................... 12
2.2 Serial number location................................................................................................................. 13
2.3 Maintenance standards............................................................................................................... 14
2.4 Fastener Torque Specification..................................................................................................... 15
3. Maintenance ........................................................................................................................... 16
3.1 Maintenance schedule ................................................................................................................ 16
3.2 Engine oil.................................................................................................................................... 17
3.3 Air cleaner................................................................................................................................... 18
3.4 Muffler......................................................................................................................................... 19
3.5 Spark plug................................................................................................................................... 19
3.6 Valve clearance........................................................................................................................... 20
3.7 Carburetor................................................................................................................................... 20
3.8 Oil alert system inspection........................................................................................................... 20
3.9 Governor..................................................................................................................................... 21
3.10 Fuel filter..................................................................................................................................... 21
4. Troubleshooting..................................................................................................................... 22
4.1 Hard Starting............................................................................................................................... 22
4.2 Low Power .................................................................................................................................. 23
4.3 Speed Unstable........................................................................................................................... 24
4.4 Exhaust Colour Abnormal............................................................................................................ 24
4.5 Engine Liable to Stall................................................................................................................... 25
4.6 Engine Liable to Stall................................................................................................................... 25
4.7 Engine overheating ..................................................................................................................... 26
4.8 Engine’s Abnormal Sound........................................................................................................... 27
4.9 Electric Starting System Failure................................................................................................... 28
4.10 Cylinder Compression Check...................................................................................................... 29
4.11 Spark Test................................................................................................................................... 29
5. Disassembly and service....................................................................................................... 30
5.1 Precautions for Disassembly....................................................................................................... 30
5.1.1. Disassembly .................................................................................................................... 30
5.1.2. Reassembly..................................................................................................................... 30
5.2 Disassembly and Service of Engine............................................................................................ 31
5.2.1. Fuel tank.......................................................................................................................... 31
5.2.2. Air cleaner, Muffler........................................................................................................... 32
5.2.3. Air cleaner, Muffler........................................................................................................... 33
5.2.4. Governor System............................................................................................................. 36
5.2.5. Recoil starter.................................................................................................................... 37
5.2.6. Flywheel, ignition coil....................................................................................................... 40
5.2.7. Cylinder head, Valves...................................................................................................... 42
5.2.8. Crankcase, camshaft, piston............................................................................................ 48
5.2.9. Governor.......................................................................................................................... 55
