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Old 09-08-2012, 04:54 PM   #2
Scraping Paint
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Join Date: Oct 2007
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Dick gave me the formula of 1gph per 20 hp as a rough rule of thumb. He said that at an rpm of 1600 rpm in our boat with factory props an FL 120 will develop 60 hp. (based on Northern Lights' GB re-powering data).Thus 3 gph per engine X two for 6 gph total. Which based on our fuel consumption observations over the years seems about right.
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