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post #14 of Old 12-15-2012
Puget Sound Pounder
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Re: overpropped vs underpropped

Regarding engine noise, ref to my last post of the change I made.

Originally Posted by kellysails View Post
@20 degrees
WOT no load 3400rpm
WOT under load 3400rpm

@22 degrees
WOT no load 3400rpm
WOT under load 3250rpm
My wife and I both noticed that after we made the change to the prop, the engine sounded slightly different at cruising rpm. It seemed a bit smoother, a bit lower sound tempo. Oddly we thought "it" sounded "happier", not so whiny
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