Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hi, my name is ***** ***** I will be assisting you.
It sounds like your PTO switch has gone bad and it causing the mower deck to stay on constantly. It would also explain the idea that when you get off the seat with the deck engaged it is not killing the engine. The contacts inside the switch are messed up and not working properly. I would replace the PTO switch which should solve your issue.
Thank you it has been a pleasure to assist you.
Please take a moment to rate your experience.