I just bought a 85' Ski Centurion with a 351 V8 inboard engine this weekend. We took it out last night and it started right up. We ran it for about an hour and then just as we were getting in... it stalled (while in gear) It will start right up but as soon as you put it into gear (engage it) it stalls. The prop is not caught on anything so it is not that. We tried to engage it with high RPM's and also tried to ease it into gear and it stalls every time. We had to be towed in. Does anyone have an idea what is wrong?