I have a 1999 18ft fisher marsh hawk with a 120 force. I bought the boat used. I have a question about the way the outboard is mounted on the boat. It is bolted to the transom but it does not sit on the transom. Whomever mounted the motor used a set of hole that actually has the motor about 1-2 inches about the transom top wall. When running full speed I barley have to use the trim button to make the boat plane out and once I do get it planed if I try to bring it any higher it starts to porpoise bad which I know a boat will do but this seems to happen with a minimum movement of the trim. Other thing I noticed is that I get a rooster tail off the corners of the back of the boat to where the water will actually come back into the boat. So I guess my question is would it help to lower the motor is it possible its to mounted to high? If not does anyone have any ideas to fix above issues