Yanmar 2QM20 tranmission- substitutions? - SailNet Community

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  #1  
Old 01-18-2009
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hertfordnc is on a distinguished road
Yanmar 2QM20 tranmission- substitutions?

I damaged my transmission. Ultimately I guess I will rebuild it but I've found several good deals on used gear boxes for other Yanmar engines- specifically a 2GM, YSM12

Even if it were not the ideal replacement, my sailing is pretty tame compared to what this boat was made for so if the trans bolts in and works it should meet my needs for a season.

Are they interchangeable? Bolt pattern? shaft coupling?
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First Boat, a well-equipped 1977 Camper Nicholson 31
What is all this stuff and how does it work?
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Old 01-19-2009
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Hert :

I suspect they are the same. It is not in the manufacturers interest to have a big inventory of gearboxes.
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