Since the problem is almost certainly in the hull design ie the prop is partially shielded by the thick stern section and far too close to the hull surely a redesign or for boats already built either grind down the thick section in way of smooth water flow or, as in my case, instal a feathering prop that sits further out from the hull. I can proceed at max rpm 3000 with only slight cavitation
Hugh
cavitation
Moderator: KenKrawford
cavitation
Equinox #315