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Old 18-04-2011, 06:30   #1
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Best Yanmar for Re-Power ?

I am re-powering my S2 9.2A. I currently have a Yanmar YGM12 that is loud and vibrates the whole boat. I would like my new re-built engine to be smooth and quiet! My choices are:

Yanmar : Model 2GM 15 HP

2GM20 18 HP

3GMD 22 HP

I would appreciate any feedback that people may have on these choices.


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Old 18-04-2011, 06:54   #2
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Re: Best Yanmar for re-power?

Greetings and welcome aboard the CF, Jim.

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Old 18-04-2011, 17:58   #3
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Re: Best Yanmar for re-power?

3GMD is raw water cooled, better choice would be 3GMF - Incidentally, both of these engines are from the 80's are you planning to buy used or a remanufactured?
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Old 18-04-2011, 20:23   #4
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Re: Best Yanmar for re-power?

Consider a Beta Marine. You are going to have to change engine mounts anyway and Beta Marine will work with you to make it easy.

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Old 18-04-2011, 23:26   #5
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I just bought a 20B Westerbeke to replace my Yanmar SB 12. The model has been discontinued due to no longer meeting 2011 emission control standards. However you may be able to find one In dealers stock for a good price. Interesting the only modification was to raise the engine bed by a 1/4 inch.
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Old 25-04-2011, 14:35   #6
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Re: Best Yanmar for Re-Power?

Allot of vessel engine rooms were built around those YSM series and there is not any clearance to fit a vertical engine. You need a min of 21 inches and most of those are 15 to 17 inches. A Ysm 12 was 12 HP so any of the models that you posted will work, the 2gm20 is the newest model.
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