Scott - Not sure what numbers you're referring to, but the serial # begins with F196002. I purchased the tractor in May 07 so I'm assuming it is a 2006 model year. I have replaced the ignition switch as well as the timer relay. The solenoid is attached to the engine block and has a single wire leading to it. The plunger is normally in the 'out' position and when activated, it pulls in, shutting off the fuel. Also attached to the fuel shut off is a manual shut off cable attached to a pull knob below the dashboard. As I indicated in my earlier note, I disconnect the wire leading to the solenoid and "jumped" the solenoid directly to the battery - and it operated. I also tested the voltage at the wire connected to the solenoid and with the key in the off position, the meter read 0 volts. With the key in the on position with the engine running, the meter read 6 volts. With the key in the off position, the meter read 13.5 volts for about 5 seconds and then goes to 0 V. This suggests to me that the off position on the ignition is sending at least 12 volts to the connector. When it is connected, however, the solenoid does not operate, the engine continues to run, and the timer relay buzzes for a about 5 seconds and shuts off.
The tractor starts easily with or without the solenoid connected. I am able to shut the tractor off using the manual pull knob.
As I said earlier, I'm at a bit of a loss on this as I'm not sure if there is anything else between the timer relay and the solenoid that would affect the affect the operation of the solenoid itself when it is connected through to the ignition - given it operates when connected directly to the battery.
Any further insight would be appreciated.
Cheers,
Bruce