Jusy expanding on a previous suggestion but most mercruiser stuff starts its life on a chevy, ford, or chrysler engine line. if you have acces to...
Does the boat turn in the same direction every time you let off? if so you may want to look at the trailer supports on the left and right sides....
I own a 73 avenger jet drive with a 455 oldsmobile engine. i was told by the manufacturer of the boat that the engines were supplied by hardin...