From what I understand Mercury's 75hp 2 stroke is a de-rated 90hp. The WOT range for the 75hp is 4750 - 5250 rpm but for the 90hp it is 5000 - 5500 rpm. My 75hp 2 stroke is fitted with 13" diameter 18 degree Vengeance s/s 3 blade prop. and runs at 5550 rpm at WOT. Will this damage my outboard?