Yanmar 1GM User Manual page 113

MULTICYLINDER ENGINES
107
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Water
hose
1. Snap ring
2. Washer
3. Bushing
4. Adjuster
5. Rocker arm
6. Nut
7. Rocker shaft stand
8. Nut
9. Washer
10. Spring
11. Washer
12. Rocker arm shaft
13. Pin
14. Locating screw
15. Wear cap
16. Keys
17. Valve spring retainer
18. Vavle spring
19. Valve seal
20. Exhaust valve guide
21. Intake valve guide
22. Plug
23. Thermostat housing
24. Gasket
25. Cylinder head
26. Gasket
27. End cap
28. Washer
29. Sacrificial anode
30. Exhaust valve
31. Intake valve
CYLINDER HEAD
4. Without removing the valves, remove all deposits from
the combustion chamber. Use a fine wire brush dipped in
solvent or make a scraper from hardwood. Be careful not
to scratch or gouge the combustion chamber.
5. After all carbon is removed from the combustion
chamber and ports, clean the entire head in solvent. While