Hi... I have a B7500HST. I was tilling today and had a small issue. The best way I can describe it is it almost seemed like the pto stopped and was slipping internally. If I stopprd moving or lifted the tiller a little it would continue tilling. My thoughts at first were that maybe the clutch needs adjusted or maybe the tiller was a little big (56'') however what I have read the PTO is gear drive so I'm not sure! Other than that it runs fine no strange noises no grinding. Any help would be awesome!