I have a Kubota B3200 tractor that won't start. I was using it, turned it off to check something behind me, and then it wouldn't restart. I've gone through the usual and have a rear PTO lever that's stuck and won't disengage. The mid PTO lever has no problems at all. I'm not using any accessories, but the rear PTO is tuck for some reason and I can't get it to move back into the 'off' position to restart the tractor. Help.