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New Mercury 20hp hitting the rev limit
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<blockquote data-quote="FuzzyGrub" data-source="post: 491386" data-attributes="member: 3438"><p>It sounds like the prop included with your motor is for a larger, heavier boat. I'd contact the dealer and see if they would exchange it for one with a little more pitch, say 1-2".</p><p></p><p>I think it worthwhile to still run the numbers in the prop calc and see how close it comes to what you have. </p><p></p><p>Raising 3/4" on the existing transom, should not be an issue. Going further than 1" would probably neccesitate a jack plate. Need to decide if its worh the trouble. Do you make long runs where the slight efficiency or slightly higher speed will pay off for you? If that answer is "yes", then need to look at what Pappy mentioned, about props that can work good closer to the surface. That usually means a more "cupped" prop and different rake. Not sure if there are "performance" props readily available for these small engines.</p></blockquote><p></p>
[QUOTE="FuzzyGrub, post: 491386, member: 3438"] It sounds like the prop included with your motor is for a larger, heavier boat. I'd contact the dealer and see if they would exchange it for one with a little more pitch, say 1-2". I think it worthwhile to still run the numbers in the prop calc and see how close it comes to what you have. Raising 3/4" on the existing transom, should not be an issue. Going further than 1" would probably neccesitate a jack plate. Need to decide if its worh the trouble. Do you make long runs where the slight efficiency or slightly higher speed will pay off for you? If that answer is "yes", then need to look at what Pappy mentioned, about props that can work good closer to the surface. That usually means a more "cupped" prop and different rake. Not sure if there are "performance" props readily available for these small engines. [/QUOTE]
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New Mercury 20hp hitting the rev limit
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