Put a briggs 14 hp v twin ohv onto an older John Deere rider. Had it running fine. Drive belt snapped and wrapped around pulleys and main shaft. Put a new belt on, fired it up ran for about 2 minutes and it died on its own. Put a wrench on the flywheel nut and it was very hard to turn. After messing with it for a while (turning the nut back and forth) it was loose again. Fired it up, ran for about 2 minutes and did the same "semi seize". Loosened it up again and I changed the oil with no help. Can the oil filter cause this? Any other suggestions? Is this an internal problem?