John Deer Mower Won't Stay Running

Usually there' a bad safety switch causing the problem. These are usually gray in color and look like a push button. Like the one you can easily see under the seat. Also a bad PTO switch will do this. There even a safety switch attached to the transmission on a JD tractor! See the loose wire?

My husbands guess is to check to make sure the belts are on the pulleys...ot , as the previous person said, the PTO switch.

There are a lot of safety switches. For example when my John Deere is running and I get off the seat the mower automatically stops. I would check to make sure all the saftey connections are connected.

My husband's guess is the PTO switch has a short in it. You may need to replace the switch.