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<blockquote data-quote="FuzzyGrub" data-source="post: 491740" data-attributes="member: 3438"><p>Still learning here. If you are not getting cavitation, Outboard Jets recommends raising 1/4” and test again. When you get cavitation, drop back down 1/4”. You need a jack plate to be able to do 1/4” increments, though. I don’t see any harm in trying to raise it a full hole. They recommend starting at even with bottom of hull or tunnel, anyway. You could also try side fins and splash plate if you get cavitation. You should see an improvement in top speed.</p><p></p><p>We are getting some cavitation in chop, so adding the side fins and splash plate, for next season. If that tests well, will raise the motor one hole. The holes are 3/4” on center on the Yamaha.</p><p></p><p>Please post results if you decide to try it.</p></blockquote><p></p>
[QUOTE="FuzzyGrub, post: 491740, member: 3438"] Still learning here. If you are not getting cavitation, Outboard Jets recommends raising 1/4” and test again. When you get cavitation, drop back down 1/4”. You need a jack plate to be able to do 1/4” increments, though. I don’t see any harm in trying to raise it a full hole. They recommend starting at even with bottom of hull or tunnel, anyway. You could also try side fins and splash plate if you get cavitation. You should see an improvement in top speed. We are getting some cavitation in chop, so adding the side fins and splash plate, for next season. If that tests well, will raise the motor one hole. The holes are 3/4” on center on the Yamaha. Please post results if you decide to try it. [/QUOTE]
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