are you saying that the starter will not spin the crankshaft at all? sounds like something was not getting any oil, and seized up. I would guess the camshaft bearings.
![Sad.. :sad2:](https://board.marlincrawler.com/Smileys/marlin/sad2.gif)
Take all of the belts off the front of the engine and see if you can turn the crank at all with the crankshaft pulley bolt (long breaker bar and 6 point socket). If you can't, then, yes, something seized.