I thought i would update the post and let you know i went with a zero hour rebuilt yanmar 4 lha 230hp diesel and all new gear. The performance is very good. My cruise number is up from 20-22knots to 24 to 26 knots at reasonable 2500-2800 rpm on the diesel. I went with a 1.22/1 transmission at the advice of the multiple experts. That was a good choice as i can run a prop thats close to square. It tops out at the same 31 knots it did with the gas engine but top speed wasn't the objective, it was improved cruise and economy with fresh power. Fuel economy is very good but i haven't run it for a real offshore trip yet which will really tell the story.
I am very happy with the results
jim
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06-25-2016, 10:19 AM
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