Yanmar BY Series Service Manual page 115

Camshaft and Timing Gear Train
12/05
14. NOTICE: NEVER remove the camshaft
sprocket screws without first locking the chain
tensioner in the released position. Remove two
remaining screws (Figure 5-97, (1)).
Figure 5-97
Figure 5-97
15. Remove two guide rail bearing pins
(Figure 5-97, (2)).
16. Remove sprocket and chain from intake
camshaft (Figure 5-98, (1)).
Figure 5-98
Figure 5-98
17. Release guide rails (Figure 5-98, (2)) from
mount and remove.
BY Service Manual
18. Remove camshaft sprocket (Figure 5-99, (2))
from chain (Figure 5-99, (1)) as shown by
arrow.
Figure 5-99
19. Evenly loosen all camshaft bearing cap bolts
(Figure 5-100, (1)) in 1/2-turn increments,
working from each end towards the center.
Figure 5-100
20. Remove all bearing caps. NOTICE: Camshaft
bearing caps are numbered and must be
installed in their original locations.
21. Remove the intake (Figure 5-100, (2)) and
exhaust (Figure 5-100, (3)) camshafts.
© 2009 Yanmar Marine International
Figure 5-99
( 2 )
( 1 )
Figure 5-100
ENGINE
( 3 )
( 1 )
0003776
5-53