I have a 2003 HP and just made a few repairs to the unit and while I had the unit tore apart, I decided to change both belts, since they needed it anyway. Got everything done and mower cranked just fine. I engaged the blades and the mower cut off. Now it will not crank or even turn over. It almost seems like a safety switch override or something. I checked the connection at the PTO switch and it wasn't loose or anything. Anyone have any suggestions as to what it might be??? This has been a great mower, but I tell ya, it hit 1100 hours and has been nothing but one problem after another. Thanks for any suggestions.