Mike,
That 15p will be a big difference but even if you get 300 or 400 rpms out of the new prop you'll still have a ways to go. If you were only getting 4600 rpm wide open, if its not too big of a PITA you're gonna seriously want to consider raising that motor a notch, too. You'll likely get another 300 rpm and get real close to where you want to be (5500 rpm).
Also confirm that your tach is set to 4 cylinders so you know its not mis-reading.
If you want to post a shot of the keels relation to the anti-cav plate you might get better opinions.
Good luck. Please keep the gang posted on you results.
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there's no such thing as normal anymore...
Last edited by McGillicuddy; 06-25-2012 at 08:13 PM.
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