9.1
Section 9
Disassembly
9
Section 9
Disassembly
WARNING: Accidental Starts!
Disabling engine. Accidental starting can cause severe injury or death. Before working on the engine or
equipment, disable the engine as follows: 1) Disconnect the spark plug lead(s). 2) Disconnect negative (-) battery
cable from battery.
The following sequence is suggested for complete
engine disassembly. This procedure can be varied to
accommodate options or special equipment.
Clean all parts thoroughly as the engine is
disassembled. Only clean parts can be accurately
inspected and gauged for wear or damage. There
are many commercially available cleaners that will
quickly remove grease, oil, and grime from engine
parts. When such a cleaner is used, follow the
manufacturer’s instructions and safety precautions
carefully.
Make sure all traces of the cleaner are removed
before the engine is reassembled and placed into
operation. Even small amounts of these cleaners can
quickly break down the lubricating properties of engine
oil.
Typical Disassembly Sequence
1. Disconnect spark plug lead.
2. Drain oil from crankcase and remove oil fi lter.
3. Remove Oil Sentry
™
pressure switch.*
4. Remove muffl er.
5. Remove retractable starter.
6. Remove electric starter.
7. Remove air cleaner.
8. Remove external governor components and
carburetor.
9. Remove fuel pump.*
10. Remove rectifi er-regulator.*
11. Remove extended oil fi ll tube.
12. Remove blower housing and baffl es.
13. Remove ignition module.
14. Remove fuel line.
15. Remove valve cover and cylinder head.
*If so equipped.
16. Remove drive cup, grass screen, fl ywheel, and fan.
17. Remove stator and wiring harness.
18. Remove oil pan.
19. Remove oil pickup, oil pressure relief valve, and oil
pump.
20. Remove camshaft and hydraulic lifters.
21. Remove balance shaft.
22. Remove connecting rod and piston.
23. Remove piston from connecting rod.
24. Remove piston rings.
25. Remove crankshaft.
26. Remove fl ywheel end oil seal and bearing.
27. Remove governor cross shaft and governor gear.
Disconnect Spark Plug Lead
Drain Oil from Crankcase and
Remove Oil Filter
1. Remove the oil drain plug and oil fi ll cap/dipstick.
See Figure 9-1.
2. Remove the oil fi lter drain plug located at the base
of the oil fi lter adapter on some models.
3. Allow ample time for the oil to drain from the
crankcase and oil fi lter.
4. Remove and discard the oil fi lter.
Remove Oil Sentry
™
Pressure Switch
(on models so equipped)
1. Disconnect the leads from the pressure switch.
2. Unthread and remove the pressure switch from the
oil fi lter adapter. See Figure 9-1.
CV11-16
CV460-465, CV490-495
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