Ive got a 28 ft twin 302 sterndrive i/o, 78 vintage fiberform. My problem has been that the starboard outdrive keeps mushrooming the hub. The drive is electric shift. The drive is pin drive. This has happened at low rpms(2000) usually after about 35 miles of travel even though it was at 8 knots. Now I did reduce the rpms at idle ( 650) instead of 850. Ive been very carefull to not shift to quick and have got to the san juans and back, 120miles. But I feel maybe my lucks running out. Heres the ? Has anyone had this problem and am I on the right track or just lucky till next time? Thanks What I mean by mushrooming is that the pin that is through the 2 ears at the end of the hob are being busted letting the pin spin and hust mushroom the end of the hub if that helps.