Re: Water over the stern?
My Merc still does what you describe, even after raising it on the transom. It does not do it nearly as bad now, and I plan on raising it another 1/2 to 3/4 inch. What is happening on mine is while planing at cruise speeds, there is just enough water contact with the area above the cavitation plate to cause a small fan of water to be sprayed straight up. At full speed, there is not very much spray. I am sure in your case raising the motor will aleviate the problem or at least reduce it. This problem can also be affected by trim as well. The more you trim out, the less the problem will be, so you should make sure you are trimming properly. The cavitation plate in most cases is best located between 1/2 to 1 inch above keel, depending on boat/motor. Too high and you can have prop ventilation and cooling issues, too low and you are just dragging too much metal in the water. Good luck...
