Replacing an MD7a with a Yanmar 2GM - SailNet Community
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Replacing an MD7a with a Yanmar 2GM

I have been keeping my raw water cooled '79 Volvo MD7a running pretty well, but recently I am getting greater temperature fluctuations, and the back cylinder is running hot. I suspect that my cooling passages are getting clogged. I am going to keep trying to get the engine cleaned up with chemical flushing, but I am not sure how much success I will have.

On the other hand, I have a line on a rebuilt Yanmar 2gm fresh water cooled engine for a good price, and I am tempted to snap it up and do an engine swap. The question is, how much different are the two engines in terms of mounting, length, prop shaft alignment, etc?

Has anyone done a swap between these two engines? What kind of issues can I expect?

1979 Santana 30 Tall Rig
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