Quote:
Originally Posted by TiltonBB
One person's "average day" wil be entirely different than another person's average day. In general, and there are a lot of variables, this has been my experience:
18 to 22 Ft. single I/O will get somewhere in the 4 MPG range.
Of course there are many different hull shapes and engines, and the weight of similar sized boats will differ from each manufacturer, but in general I think that these numbers are not too far off.
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Formula F223 LS with 454 Magnum and 24P Revolution 4 average about 8 GPH so the 4 MPG is about right. With the factory 21P 3 blade it was in the 11GPH range or .5 mpg. Its all in the prop!
When I raise the trim a bit for a little rooster tail at 40 mph around the Meredith Neck area, I was surprise how many calls Marine patrol gets about a boat doing 100mph. So keep your tail down!