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bought a 1993 stingray boat two weeks ago. Boat ran fine until this past Sunday, when we were riding it. We slowed down to go by a small John boat. After we passed him we were going to speed up. Pushed the throttle down. Boat made a whinning noise and would not go in forward or reverse. Talked to a mechanic who said that we might have spun the prop. We changed it. Boat still won't go in forward or reverse. Noticed drive shaft isn't turning when we put it in forward or reverse. Prop doesn't turn either. What could be the problem? It has a knocking (not real loud) that wasn't noticed before.
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