does not have any speed we have a small 17' maycraft 800 lbs.with 3 persons weighing 665lbs,i would add about 300lbs for gear, we are gps's at 8 knots max out rpm, we dont have tach so no rpms- would guess to max out about 4200r's,prop on it is a 10 1/2 x 14, 35 hp johnson 2000, my idea is to...