[QUOTE=hcompton;1617261]How many gallons per mile does the boat get like that.
That sounds like a 600hp engine.
He should be able to turn a pretty fat prop with a 4000/4500 rpm tq peak. Should also not be to bad on gas at part throttle and still move a larger boat.
Yeah, his skiff will burn through 20 gals of gas on a day river cruise, no problem. 523 HP to be exact. Spins a pretty big 2 blade @ about 80 mph.
Funny thing though, I turn my 283 6500 and run right there about 77 MPH, so big cubes and HP isn't everything. Drag and handling become real important when it comes to going fast on water.