What is the purpose of p/n 759-3689 on 1440

[happyhab]

What is the purpose of p/n 759-3689 on 1440.

Looks like it connects from the fuel solenoid to the starter, but I thought the fuel solenoid would be running back to ignition as an accesory that needs 12V during operation to stay open? If it connected to the starter, it would only see power during during cranking right?

Here's the link to CC parts:

http://www.cubcadet.com/webapp/wcs/s...A/040024700017

[Oak]

From the schematic it looks like in the start mode (B to S) on the ignition switch they power the fuel solenoid off the starter through a diode. Then in the run mode on the ignition switch (B to R) it's powered off the R terminal. The diode blocks flow so the starter doesn't keep spinning while the tractor is running and burn up the circuit from the heavy load it pulls.

[happyhab]

Thanks for the reply. I can see that it is a little more complicated to do it that way...wonder why. We are wiring in a 14hp Vtwin into an Original. So I will just run the fuel solenoid of the accessory or ignition power, something that has 12V continuous while running.

[Sam Mac]

You need power to the solenoid also while starting or you get no gas. It needs to be powered at all times when starting and running then no power to shut it off. The Diode handles this issue. As long as you’re using a key switch it’s probably the best way to deal with it. On my 1210 I had long ago junked the Cub wiring harness and installed a toggle switch and a push button for the starter so when I did the re-power in my 1210 I just ran a wire to the solenoid that has power in the run position. Not suggesting you do it my way because my tractor has none of the Nanny State mandated safety switches.