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Re: Help with engine ID?
Definitely a Yanmar QM, no heat exchanger .... or heat exchanger removed and engine converted to raw water cooling. There's a lot of normal accessories apparently missing - the 'hand crank starter', although the pinion crank gear is still there ... left lower part of the full view pic.
Should be a Model ID plate just in front of the 'starter' on the 'block'.
Cant see how many cylinders in your pic.
2QM20 2cylinder 20 nominal HP
3QM30 3 cylinder 30 nominal HP
Transmission ID = a plate on top of the gear case.
3QM30 uses KH-18 Trans.
2QM20 uses KBW-10 Trans.
There's also another 2 cylinder version 2QM15 15 nominal HP (I have no data on this one)
All of these engines have a Maintenance & Repair Manual -- available at most Yanmar Dealers.
Last edited by RichH; 01-27-2015 at 02:34 AM.