I have a 150 Mercury Black Max XR2 1987 with a stainless steel prop.. I havent had the boat long but I cannot figure out why it cavitates when takeoff... here is what I do have.. measuring straight down from the bottom of the boat to center of prop it is around 4.75 inches... and the only numbers I can find on the prop are M-24.. after looking it up it looks like the diamater of this prop is only like 13-1/4 inches... and it shows on the prop wizard I need 14-1/4 x 23 pitch.. can someone help out do I need to lower the motor and get a new prop or just get a new prop and see what happens????
