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post #6 of Old 09-19-2010
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Yanmar is a tight fit

Kent, your plan appears sound but I have some cautions.

About Yanmar ... my '84 IB30 came with a Yanmar 2GMF - 13 HP continuous output. I think it was the standard engine for that year. It's a great engine -- it runs fabulously, does not burn oil, and its compression is still good a quarter century later. At my survey it started with 2 seconds of cranking after 2 years on the hard. In cold weather it starts after only a few seconds of cranking if I set it to 1/2 throttle.

However, there is a drawback. The 2GMF is a very tight fit! After I change the big Racor filter, I can't bleed the fuel line using the fuel lift pump w/o burning my arm when the engine is hot. I hope the newer Yanmar models you will be considering are smaller and better arranged. Be careful and thorough doing the research to ensure the new engine will fit.

I have also wished I had a little more horsepower when pushing upwind in some chop. If the rule of thumb is 2 HP per 1000 lb, my boat should have a 17 HP continuous output engine. Even now Yanmar offers models around 14 and 21 HP but not one in between. Finding something with that rating is possible. I see that Westerbeke offers the 18 HP model 20B2 (see I've no idea how good the engine is or how easy it is to service, so don't take my mention as an endorsement. But if I were doing the research the 20B2 would be on my short list of engines to look at closely.


T. P. Donnelly
S/V Tranquility Base
1984 Islander 30 Bahama
Pasadena, MD
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