Workshop manual
1. Parameters ................................................................................................................................ 4
1.1
Engine Structure ........................................................................................................................... 4
1.2
1.3
1.4
Drawings of PTO Dimensions ....................................................................................................... 8
1.5
2. Service information ................................................................................................................ 12
2.1
2.2
Serial number location ................................................................................................................. 13
2.3
Maintenance standards ............................................................................................................... 14
2.4
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
Engine's Abnormal Sound ........................................................................................................... 27
4.8
4.9
4.11 Spark Test ................................................................................................................................... 29
5. Disassembly and service ....................................................................................................... 30
5.1
5.1.1. Disassembly .................................................................................................................... 30
5.1.2. Reassembly ..................................................................................................................... 30
5.2
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
5.2.9. Governor .......................................................................................................................... 55
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