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Old 04-19-2012
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Re: Rebuilding Yanmar 3GM30F; need advise $?

The previous and original owner of my C&C 32 removed the old Atomic bomb that the boat came with and replaced it with a brand new 3GM30F with a new 2.21/1 gearbox, shaft, and o-ringed stuffing box, cost $12,000. It has 500 hours on it and I still concider it not completely broken in.
At work, we run Yanmar engines on soil screeners, rockcrushers and many other pieces of earth moving equipment. These engines run in some of the worst conditions with minimal maintenance. Most engines will reach 10-12,000 hours before any major work is required, some will last even longer.
An engine with 3500 hrs. on it is just nicely broken in. You may want to look at external components like alternators water pumps, injectors, etc., but unless you are experiencing a problem the engine itself should be fine.
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