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    Determining Prop size and pitch

    Hello,<br /><br />I have a 3 blade prop that has a long number on it..with at least one hyphen in the number. Is this a part number? The very end of the number is 21p which is assume is the pitch of my prop. How can I find out what size etc.?<br /><br />Thanks,<br /><br />Adam
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    Porpoising

    Hi,<br /><br />I have a 22 foot sunrunner with a 5.7 V8 merc I/O. I have noticed some porpoising going on when running. If I put some weight into the front bow of the boat..it stops. I don't want to put dead weight into the boat (fuel economy). Is there a way to use my trim tabs etc. to help...
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