What is the best way to make sure your outboard motor is straight on the transom if you have a jackplate? My boat is unstable at higher speeds and I think the motor is not exactly plumb with boat. Standing behind the boat (with boat level) it looks like motor (powerhead) is tilted slightly to the port side. At higher speeds the boat rocks back and fourth and bow moves left to right (gets worse with light load). Any help is greatly appreciated.<br /><br />Motor - 1994 Evinrude 225<br />Jack Plate - Rite-Hite 10" set back<br />Boat - 1995 Champion 204