last night i put the motor on my 17.5 ft 1983 thundercraft, and the transom made a little creaking noise when the weight was all the way on initially, however when the motor is started or if i shake it or anything of that nature when it moves the transom makes no noise and is very sturdy. the motor i put on is a 100hp 71' evinrude which was bored out and supposedly makes 115 said the previous owner.the boat itself is rated for up to a 115hp motor. just wondering if that creak noise was anything detrimental to the boat. and i dont wanna go out on the lake and open it up a bit and have the motor rip off. just a little paranoia