Join Date: Feb 2010
Location: Narragansett Bay
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Re: Yanmar 2GM20F
..........I am leaning towards full rebuild by a erengine rebuilder machine shop.
Be sure you know what they are going to do. A cheap rebuild is a waste of every dollar. The paradox with a rebuild is that you really want to get everything back to near new, while you have it out. You wouldn't want to pull it again, would you?
However, a good rebuild can cost well more than half the value of the motor.
One way to save some money is to do the disassembly and reassembly yourself, if you have the skill and manuals. Outsource the machinist stuff that requires special tooling.
Another strategy is to go find your exact motor in excellent used condition, which would be much less expensive than a rebuild.
If you want to be decadent, consider buying a new one and seeing if they will take your core on trade. Puts you back together, worry free.
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In the harsh marine environment, something is always in need of repair. Margaritas fix everything.