My old outboard wanted to plane/come off plane right at wakeboard speed. We eventually figured it out about the time my buddy bought a Response. We parked the outboard and it never saw the water again until the day I sold it...
We just trimmed it all the way down and put as much weight in it as we could stand. Used 5 gallon water jugs in those days, all over the place. They fit perfectly in the walkway between windows, and the boat made a decent wake anyway as it was really heavy.