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Old 04-19-2013, 05:29 PM
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jafo9 jafo9 is offline
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Join Date: Jan 2011
Boat: 2002 X30 LTR
Location: Southeast
Posts: 720
your hull wasn't built for speed. i'd take the GPS before i started trying to adjust the PP. i have the high altitude prop and the LTR but the same hull. i can't recall off hand, but i don't think i'd be at 40 at 4K rpm. if you want to check your paddle wheel, it should be under the hull not at the transom like i/o's. regardless, take your gps or even your iphone and check. i'll bet that it's closer than you think to accurate. i carried my gps for a while on my 02 X30, but my PP was pretty close so i just came to rely on it. my other boat has a pitot type on the lower unit of the OB. its pretty much worthless so i have to carry the gps. good luck.
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