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post #2 of Old 05-15-2012
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Re: Identifying a Yanmar

If it is a fresh water cooled motor (ie has anti-freeze in the heat exchanger), that it is most likely a 3GM30F. The F means Fresh Water cooled. A 3GM30 is raw water cooled. I haven't heard of a 3GMD, but that doesn't mean it couldn't be that.

I have a 3GM30F motor in my boat. If you are looking at the pulley's, the oil filter is to the right, the sea water impeller is to the lower left, behind the lowest pulley and the air intake is on the right side, top, about half down the length.


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