2. Inspection and adjustment
93
(6) Adjust the tension of the alternator
driving belt
Replace the alternator driving belt with new
one every 1000 hours or four years, whichever
comes first, even if there is no crack in the
surface.
Refer to 2.2.2(4) for the procedure.
(7) Adjust intake/exhaust valve clearance.
Refer to 2.2.2(5) for the procedure.
(8) Check/adjust the remote control operation.
Refer to 2.2.2(6) for the procedure.
(9) Adjust the propeller shaft alignment.
1) The rubber tension of the flexible engine
mounts is lost after many hours' use. This
leads to a drop in vibration absorption
performance, and also causes centering
misalignment of the propeller shaft. (Refer to
5. "Flexible Engine Mount" in the installation
manual for pleasure boat use.)
Note:
Be sure to replace the Yanmar flexible engine
mounts every 1000 hours or 4 years,
whichever comes first.
2) After replacing the flexible engine mounts,
check unusual noise and vibration of the
engine and the boat hull with increasing the
engine speed gradually and lowering it.
3) If there is unusual noise and/or vibration,
adjust the propeller shaft alignment. (Refer to
6.4.5 "Centering the Engine" in the installation
manual for pleasure boat use.)
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