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Old 05-29-2007, 10:14 AM
scfan scfan is offline
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Join Date: May 2007
Location: Harwich, MA
Posts: 7
Default Re: How much can 1/4\" diameter diff in prop size m

Here are the results from the weekend: the new 15 1/2" diam. x 17" pitch 3-blade SSII prop got slightly better in RPMs than the old 4 blade prop did. The engine achieved 5300 RPMs at WOT. This is 100 RPMs better than the old prop but still not up to recommended WOT achievement for my 250 HPDi of 5500 RPMs. If I can find one I may try a 15 1/4" diameter x 17" pitch but may not have the time this season. If I do I'll post the results. Hope everyone had a great weekend on the water!
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