Hi guys.I have a 1996 Evinrude 225 Vindicator and with a 27 pitch four blade I can reach 72.8 mph on the gps.My mate has a brand new High output Johnson 225 and with virtually the same prop he can hit 80.5 mph.Our hulls are both vee bottoms except my hull is about 400 lbs heavier.Is the weight difference going to rob my boat of that much speed?Please help guys