Well, I went and ordered a 12 volt solenoid valve that is diesel fuel compatible. The valve body is brass. It should be here by Sunday. Hah! Mail is so bad here on the island I won't hold by breath. But I will use the time to figure out how to mount the valve. There are drawings online showing mounting hole dimensions so I will use that info to fab a bracket or something to fasten the valve to. I am going to experiment smacking the ball with a punch and if the thermostart leaks when cold then I will install the valve. One really nice feature using the valve will be the ability to use the timer in the tractor. At least I think there is a timer. The red light on the dash only stays lit for a short period of time but the thermostart coil stays energized as long as the key is turned to the left. I think the reason there is a box on the firewall with a wire coming out that goes to the factory thermostart is because it powers the thermostart valve for only as long as the dash light is on. Anyway, I will post about how it all works out.
Eric