I have a 1986 16.5ft fibreglass tempest tri-hull bow-rider with 1975/75hp Stinger on the back. boat runs nice and level up to half throttle, but when you pin the throttle, the boat leans to port. I've made sure that the motor is mounted stright, and even shimmed the right side of the motor in hopes that this would help. It dosn't! <br /> Could it be prop cavitation? The hull? Would a whale tail help?
