I have a 1976 Starfire with a 235 OMC engine and OMC outdrive. The top of the outdrive was rebuilt because the water pump shaft spun out. Put everthing back together and didnt have the time to take it out for almost a year (selfemployed) So last saturday took it out with the family and ran great , A little hard to stear to the right at first but was OK. Gave it some throttel coming out of the dock but not enough to make wakes. after the no wake sign, gave it some more throttel (about half) 5-10 min in the engine just stoped. It came to a studden stop!! Tryed to restart but nothing. You herd the started engadge but could not turn the engine over. The engine did not over heat. It was like something was just shoved into the engine to stop it. Got it home and took out a sparkplug and tried to turn the engine from the lower pully. It turned only 1in in eather direction.
Any help is appreciated, thanks for looking."