Yanmar GM30 To Hot Water Heater - SailNet Community

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Old 05-05-2008
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Yanmar GM30 To Hot Water Heater

Has anyone done the conversion for a fresh water cooled Yanmar GM30 to a hot water heater. What kit is involved ? Where is the hookup on the engine for the water/ antifreeze flow to the hot water heater? Do I need a different engine thermostat? Is there material I can downlkoad as the manual does not have the detailed information?

Thanks for your help in advance,

Dave
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Old 05-06-2008
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I did it pretty much from scratch, and didn't have any problems. Look in your engine manual, at the coolant pump diagram, and there are two hex wrench plugs that come out, and go to and from the hot water heater. You need to provide your own tapered hose barb fittings, and may have to do some 'extensions' or elbows or whatnot in your plumbing to get the radiator hose between the pump and the hot water heater out of harms way. Don't forget the teflon tape. I put a couple of ball valves in-line on the out and the return too, just because it made me feel better about being able to cut it off on-the-fly, in case something went wrong with the hot water heater.
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