Fuel Solenoid Power ??
 

SO I put a new carb on my 3206 with Kohler CH22S today. I found the PO had removed the solenoid and placed a blank steel strip over the hole.

The wire was still there so I simply plugged the new solenoid into this wire. However, the engine would start but then shut down a second later.

I found that the solenoid is only energized while the key is tuned fully to start. As soon as the key is released the wire is dead again.

Am I correct that as long as the key is on the solenoid should be energized then when key is off the solenoid is de-energized and shuts fuel off ? Right ?

The fuse in the fuse block with red wires is hot on both sides.

Any ideas why this solenoid wire goes dead with key in run position ?

You are correct.

There several interlock (or safety) devices in the circuit.

There are 3 different wiring diagrams for the 3206, depending on Chassis Serial Number. Let us know the S/N and I'll trace down the diagram in the morning.

Great ! Thanks ! here's the info...

There are 2 diodes in that circuit that power the solenoid. One is in the start circuit and the other in the run circuit. The violet wire from the alternator should go to a junction with the red wire going to the fuel solenoid for the run circuit. I'm thinking your "run" diode is open. You will need to check that with a diode check function on a meter.

Hey oak, if that's the case then I should read 12 volts (with key in run position) at the engine connector where the red and violet wires connect together or, the red wire on the opposite side of that connect right ?

In other words, before the diode.

Yes. Here is some diagrams that will help.

With the engine not running and the key in the run position the seat safety switch must be closed(sitting in seat). With the engine running the alternator will power the solenoid and the seat switch is out of the circuit.

Todd:

I spent a couple of hours looking this morning, to see if Cub Cadet or Kohler had a Diode Replacement. Best I could find, but could not verify, the diode(s) are part of a Kohler harness - #24-176-171-S. Seen it was a bit pricey. I could not find a good picture of that kit, to see what it included. One could buy a single Diode from some supplier for <$5.00 ...... IF.....one knew the specifications.

:Work:

Did a quick search and found a diode replacement kit- 25 755 31-S.

I know how I would fix it..... and it wouldn't involve diodes. :biggrin2:

But I can't say on here what I would do......