Yanmar BY Series Service Manual page 97

Pistons and Cylinders
12/05
5. Install special tool OEM No. 11 6 330 on
connecting rod (Figure 5-58).
Figure 5-58
Figure 5-58
6. Lubricate the piston, piston rings, cylinder bore,
and piston ring compressor with clean engine
oil.
7. Position the piston rings so that the ring gaps
are distributed evenly (approximately 120°
apart) around the piston and not in line with the
wrist pin. Install piston ring compressor
(Figure 5-59).
Figure 5-59
Figure 5-59
BY Service Manual
8. Carefully install the connecting rod and piston
so that the arrow on the piston points toward
the front end of the engine (Figure 5-60).
NOTICE: NEVER force piston or drive piston
into cylinder bore. Install using only finger
pressure.
Figure 5-60
9. Remove special tool OEM No. 11 6 330
(Figure 5-61).
Figure 5-61
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10. Check bearing oil clearance before proceeding.
See Measure Oil Clearance on page 5-59.
11. Apply a light coat of clean engine oil to the
bearing insert and crankshaft journal.
© 2009 Yanmar Marine International
ENGINE
Figure 5-60
Figure 5-61
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5-35