I took my 2007 Outback direct drive out for the first run of the season this weekend. When pulling up a boarder, either the prop or transmission slipped during the hole shot within the first couple seconds of applying throttle, for just a second, and then caught and powered up to speed with no issues. This only occurred when pulling--not when throttling without a skier. I called the guy who winterized it and he said it is likely that the prop is bent and slipping rather than transmission, which shouldn't do that. Any ideas?