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#21
08-04-2008, 08:11 AM
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Re: Need ideas to stop porpoising?
The OFS4 prop is actually made by PowerTech Props, and is, in my opinion, one of the 2 best props made for SeaCraft hulls. 16" pitch sounds perfect in a 4 blade. It is a heavy stern-lifting prop, very strong blades (not thin), with moderate progressive rake, allowing for a wide range of trim angles. It also happens to be the basis for the prop I ran on my 20' Seafari, although I ordered mine in a custom 3 blade 16.5" P and 15.25" diameter. I had a Merc V6 2.0L on my boat at the time, which was built to produce about 190/200 hp.
The other advice from Tom is about right. You need to get the cavitation plate above the hull bottom so that it doesn't pull the stern down while planing.
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Common Sense is learning from your mistakes. Wisdom is learning from the other guy's mistakes. Fr. Frank says: Jesus liked fishing, too. He even walked on water to get to the boat! Currently without a SeaCraft  (2) Pompano 12' fishing kayaks '73 Cobia 18' prototype "Casting Skiff", 70hp Mercury 
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