turbodog
Flashaholic
Mine is a 30 inch Honda ride on. It has right hand threading. I used a 1/2 inch drive breaker bar and a good amount of muscle to break it free. I tried it last year, with enough force to make me consider that it might be a left hand thread.
So, blade in hand, with some light cleaning up against a fine grit grind wheel. It cuts, once again, like it should.
Put a couple drops of oil on the bolt threads before reinstalling.