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Old 03-09-2008, 04:36 AM   #5
FF
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RE: OEM prop on a PT-38

"Overproping" for most vessels run at displacement speeds is a GREAT idea.

With a Flank of under 10K , the guess is you will cruise at SL (square rt of lwl) times 1.1 for good long range and low fuel use.

This is usually 2 to 4 gph , or 36 to 70 hp at the prop , a long way down from the WOT rating.

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