I have a J14 and a 15hp yamaha 4 stroke with a 20" shaft. The cav plate is 2" below the bottom of the hull... I also have a hydrofoil on the motor... When running the boat solo I can get on plane and run 21-22mph easily... However when I add another person to the boat she doesn't want to get on plane. The manual tilt has the pin in the second hole from the bottom... Could she not be getting on plane due to the cav plate issue or could it be the pin is in the wrong spot?