my friend got an 16 ft aluminum boat with a yamaha 30 enduro on it. Aquired boat and motor seperately. Tried it for a run but the boat is steady digging in and real hard to steer.I tried to adjust the angle of the motor but its no good.the trim tab on the motor is almost corroded away so hes getting another one but that shouldn't matter to planing .The boat is fine as long as you dont go to fast.Wondering about the transom height ,what should it be for the 30?