i just went through this.
Mine may have been stuck really bad, i dont know.
But i ended up cutting the pto flywheel off using a angle grinder. I may be the only one to ever do that, but i paid 40 dollars for a new flywheel.
Plus all new bearings on the outside of the crankshaft, which were ok before we started fighting with the flywheel.
I had to be really carefull with the grinder.