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New propeller for my 15 hp 1980 johnson
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<blockquote data-quote="kstrayhorn" data-source="post: 412286" data-attributes="member: 15815"><p>The blade faces will have more surface area. I've replaced my original prop both with a new OMC/BRP one and a Solas one and both have larger faces than the original. 9 1/4 is just going to be 1/2" smaller diameter than 9 1/2. Mine ('86 Evinrude 15hp) had a 9.25x8 on it so that's just what I replaced it with. In any case, as long as you have the right spline count that one should work. There will likely be some performance differences with a smaller prop (If I'm right, less face area -> less water moving -> decreased acceleration / less resistance -> higher RPMs -> increased top speed) but with a 1/2" difference in diameter I'd think they'd be nominal.</p></blockquote><p></p>
[QUOTE="kstrayhorn, post: 412286, member: 15815"] The blade faces will have more surface area. I've replaced my original prop both with a new OMC/BRP one and a Solas one and both have larger faces than the original. 9 1/4 is just going to be 1/2" smaller diameter than 9 1/2. Mine ('86 Evinrude 15hp) had a 9.25x8 on it so that's just what I replaced it with. In any case, as long as you have the right spline count that one should work. There will likely be some performance differences with a smaller prop (If I'm right, less face area -> less water moving -> decreased acceleration / less resistance -> higher RPMs -> increased top speed) but with a 1/2" difference in diameter I'd think they'd be nominal. [/QUOTE]
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New propeller for my 15 hp 1980 johnson
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