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post #5 of Old 03-28-2013
John Y. Jackson
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Re: Repowering a Bahama 30

I repowered an Islander 30 MK II (almost identical to the Bahama 30) with a Beta 13.5. I like it. The original engine was an Atomic 4. I had a mechanic to all the work. The only problem was the prop pitch. The Atomic 4 had an 8 pitch 2 bladed folding prop. Sorry I forget the diameter. The formula that Beta had said with the 13.5 I should have a 12 pitch prop. Wrong! After a year I repitchd to 9 and it is much more efficient, more power in waves, etc. The original with eh A 4 was 2 bladed folding, this is 2 bladed fixed. If at first it seems like you do not have the power you expected check the pitch of the prop. Does the engine run the expected number of RPM at full bore? Does the stern squat? These are good indicators the pitch is wrong.

John on Aquila
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