Yanmar 6BY2 - Oil Pump

LUBRICATION
Repair
8-12 BY Service Manual
© 2009 Yanmar Marine International
3. Remove bolts (Figure 8-15, (1)) that secure oil
sump to the flywheel housing.
Figure 8-15
Figure 8-15
4. Remove bolts (Figure 8-16, (1)) securing oil
sump to cylinder block.
Figure 8-16
Figure 8-16
5. Remove oil sump (Figure 8-16, (2)) and gasket
(Figure 8-16, (3)).
6. Clean gasket surfaces of old gasket material.
7. Install oil sump with a new gasket.
8. Tighten oil sump bolts beginning at the center
and working alternately toward each end.
Tighten bolts to 20 N·m (177 in.-lb).
9. Connect oil dipstick tube to oil filter housing.
10. If removed, install oil drain plug and tighten to
25 N·m (221 in.-lb).
11. Fill engine with clean engine oil.
12. Run engine and check for leaks.
13. Check oil level and add more as necessary.
Oil Pump
The oil pump contains no serviceable parts. If the
oil pump is damaged, it must be replaced as an
assembly.
Remove Oil Pump
1. Drain oil from oil sump.
2. Remove oil sump. See Remove and Install Oil
Sump on page 8-11.
3. Remove bolts (Figure 8-17, (1 and 2)).
Remove oil strainer assembly and suction pipe.
Figure 8-17
Figure 8-17
4. Remove bolts securing oil pump
(Figure 8-17, (3)). Remove oil pump from
engine.
Install Oil Pump
1. Install oil pump assembly. Ensure drive chain is
properly engaged on the sprocket.
2. Secure oil pickup to oil deflector and oil pump
with new gasket. Tighten bolts to 10 N·m
(89 in.-lb).
3. Install oil sump. See Remove and Install Oil
Sump on page 8-11.
4. Fill crankcase to proper level with new engine
oil.
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