Yanmar 1GM, Operation Manual

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Important
If the canister is overtightened,
difficulty may be experienced in
its removal and the filter may be
damaged.
2. New Lub. Oil
1-c)-6. Start engine and check for leaks. Check oil level after
running the engine for several minutes and fill up when
necessary.
2) Reduction/reversing gear case oil.
2-a) Check the oil level before every operation.
3. New Cannister
2-b) Replace the oil. Replace the oil periodically same
procedure as engine lube oil.
Important
Reduction/reversing gear case oil for 3GMD and 3HM
is different from engine lube oil.
[9-3.] Cooling water system
1) Make sure that water is coming out of the cooling water
outlet pipe during operation.
2) Inspection and replacement of anticorrosion zinc.
Replace the anticorrosion zinc after every 500 hours of use
to prevent electrolytic corrosion by the cooling water.
Although it depends on the quality of the raw water and the
operating conditions, remove the scum(dross) adhering to
the surface of the anticorrosion zinc.
If less than 1/2 of the anticorrosion zinc is left, it should be
replaced with a new one.