Hey All<br /><br />Just as you start to gain confidence in your motor, S*&% happens!!! 1966 650 Merc<br /><br />Had myboat out onthe weekend ( Family camping trip)finally convinced my skeptical wife that the motor wasworking great(and it had been) SO we all went fishing the motor worked marvelously going up the lake, it was were ready to try another fishing spot that things went horribly wrong. startedthe motor and put it in gear,heard a loud grinding noise but the boat started togo forward so I began to accelerate,as the boatbeganto plane out it all of a sudden began to slow down but the enging began to over rev. We were able to slowly make it back to the boat launch under our own power but only with the enginge idleing. As soon as I would accelerate it would do the same thing.Iinitial thought was that the lower unit was striped out ( Had lower unit serviced last year at a merc dealer he said the gears were worn considerably),but now I wondering if the prop has spun out. Is there a way you can tell by inspecting the prop???