In Reply to: starter solenoid problem posted by thad on August 19, 2021 at 23:52:43:
“the new starter solenoid only clings when the white wire is grounded”
“Yes it said for a 8n the wire goes to the push button on transmission”
Assuming it is the correct solenoid and assuming the white wire goes from small post on solenoid to starter button. The hot battery cable goes to the BAT terminal on the solenoid. The small terminal connects to the starter button.
The starter solenoid activating coil is connected internally between the BAT connection and the small post. The starter button grounds the small terminal and activates the solenoid.
Sounds like you can not activate with starter button but can by grounding the wire. If so you likely have a bad wire connection between solenoid and starter button, a faulty starter button, or you are trying to activate the starter with the tractor in gear. With starter in gear the system is designed to prevent the button from making contact.