ENGINE
Camshaft and Timing Gear Train
5-48 BY Service Manual
© 2009 Yanmar Marine International
Remove Timing Case Cover
NOTICE: When working on the oil, coolant or fuel
systems, you must protect the alternator from
contamination. Cover alternator with suitable
materials. Failure to comply may result in an
alternator failure.
1. Disconnect battery negative (-) cable.
2. Drain engine coolant. See Drain and Fill Closed
Cooling System on page 7-10.
3. Drain engine oil. See Change Engine Oil and
Replace Engine Oil Filter Element on page 8-9.
4. Remove alternator and seawater pump drive
belts. See Remove and Install Alternator on
page 11-5 and Replace Seawater Pump Belt on
page 7-19.
5. Remove oil sump. See Remove and Install Oil
Sump on page 8-11.
6. Remove cylinder head. See Remove Cylinder
Head on page 5-19.
7. Remove vibration dampener. See Remove and
Install Vibration Damper - 4BY2 on page 5-46
or Remove and Install Vibration Damper - 6BY2
on page 5-47.
8. Remove front crankshaft seal. See Replace
Front Crankshaft Seal on page 5-64.
9. Remove alternator belt tensioner.
10. 4BY2: Remove alternator. See Remove and
Install Alternator on page 11-5.
11. Remove bolts securing cover and remove
timing case cover (Figure 5-85).
Figure 5-85
Figure 5-85
12. If the coolant pump has not been removed, cut
the gasket at the three tabs (Figure 5-86, (1))
and remove timing case cover portion of
gasket.
Figure 5-86
Figure 5-86
0006524
(1)
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