Join Date: Mar 2007
Location: New England
Thanked 7 Times in 7 Posts
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You maybe confusing the 3T72HLE number with the engine model. I am not a Yanmar expert, but my engine is vintage yours and don't recall theat number as a 3GM model. The 3 GM models that I am aware of are that 3GM30 and 3GM30F. One is sea water cooled and the other (3GM30F) fresh water cooled.
You could call a authorized Yanmar dealer and give them the serial number off of your motor and they would be able to tell you what you have.
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Last edited by DrB; 07-28-2010 at 07:11 AM.