ENGINE
Flywheel and Flywheel Housing
5-40
BY Service Manual
© 2009 Yanmar Marine International
Replace Rear Crankshaft Seal
1. Drain engine oil. See Engine Oil Specifications
2. Remove flywheel. See Remove Flywheel on
3. Remove oil sump. See Remove and Install Oil
4. Remove bolt (Figure 5-69, (2)) and crankshaft
sensor (Figure 5-69, (3)). See Replace
Crankshaft Sensor on page 12-24.
Figure 5-69
Figure 5-69
5. Remove bolts (Figure 5-69, (1)) and remove
rear crankshaft seal and housing as an
assembly.
Note: The rear crankshaft seal and housing
are available only as an assembly.
The seal has a protective bushing
(Figure 5-70, (1)) installed and is to be
used during installation. Use only the
supplied bushing as an installation tool.
Keep the bushing as a special tool for
use in future service.
Figure 5-70
Figure 5-70
6. Lubricate the crankshaft outside diameter. Push
the seal housing squarely onto the crankshaft
(Figure 5-70).
7. Install bolts and tighten securely.
8. Install oil sump. See Remove and Install Oil
9. Install crankshaft sensor. See Replace
Crankshaft Sensor on page 12-24.
10. Install flywheel. See Install Flywheel on
11. Add engine oil to the correct oil level. NOTICE:
NEVER overfill engine with engine oil.
