Small Engine Troubleshooting Problems? Ask a Mechanic Now.
The spindal nut is a nylock nut (nut with a plastic insert) that if heatd with a torch may come off with a standard wrench if yo hit the wrench wiht a hammer. If not an impac wrench is needed.
TENSION THE BLADE BELT OF FIND A METHOD OF HOLDING THE BLADE PULLEY FOR THAT SHAFT. A STRAP WRENCH MAY HOLD IT BUT YOU PROBABLY NEED AN IMPAC WRENCH TOO.