No one has touched this mower but me since it was new. I've had no problems...just maintenance since March 2018. I was on the mower, cutting grass and spraying ant hills for a hour or more and stopped to call someone. That's how it was....the click of the PTO (clutch) changed. It clicked when I turned the switch OFF....rather than on. The seat switch is working. I cranked the mower with blades rotating and moved it in my shop but stood up and it cut off. The PTO switch is working but backwards. The clutch has been a little louder than normal for 3 years...I bought a clutch 3 years ago. I'll replace the suspect today and get back here. If not it....I'll look at relay. I also have a spare PTO switch....I buy stuff early inc. the belts I put on 2 months ago were purchased 5 years back.