MY MOWER AFTER MOWING 15 TO 20 MIN. I DISINGAGE BLADES TO GET OFF THE MOWER FOR WHAT EVER REASON THEN GET BACK ON MOWER THE pto WILL NOT ENGAGE, I CAN WAIT UNTIL IT COOLS OF AND TRY AGAIN IT WILL ENGAGE BUT ONLY OPERATE FOR A SHORT TIME. iT WILL DISINGAGE AND BURN A FUSE.