I have a 21' Velocity with a Mercury 300x and having trouble pulling skiers out of the hole. Running a Mazco HP4 4 blade 24 at about 6400 Rpm at WOT. About 70 MPH.

Boat bogs down pretty hard before it starts to plane. 4-5seconds of very low RPM before it loosens up. Any suggestions? Thinking about pitching down to a 4 blade 23.