Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
What is the battery voltage measured with the voltmeter? has to be above 12.5 volts. Will battery start tractor without a jump or battery charger? The pto has to have 12 volts to engage the magnet.
Parts list shows a pto relay, a square relay about an inch in size. Locate it and see if it is the source of the varying voltage.
Usually under dash , close to the pto switch wiring. It will be the only relay in the tractor.
Two wire switch will be either open or closed. Typically the seat switch only affects the start circuit, not the pto engage circuit. I doubt the seat switch is causing pto not to get voltage.
OK> Did you find the relay?
That should be the relay, is it not plugged in?
Does it kill the pto?
here is the pto section from the service manual with the RMC module. link below
Sure, just use link in your email to get back.