I have a Scarab 7300 lbs boat 31' with two 500hp. When I take off I have to make sure it doesn't rev over 2800 rpm or it will cavitate and spin out. I use a 27" 3 blade mirage. Sould I go to a four or five blade prop to stop the cavitating or will it help the take off? Also is the three blade prop better for speed?