BX2200 stop solenoid?

[matt123]

Have searched as best I can but can't find any conclusive answer so apologies if I am repeating previous posts.
Problem - engine runs when on starter motor but when key released to run position it quits. Half hour before this happened the slow blow 50A fuse blew tho I just shorted it to get things going again (possible mistake!)
Removed stop solenoid and engine runs fine. Measured voltage at solenoid connector, 12volts on red/black wire with key in run position, 12v on white wire when on starter crank position, black wire rings out to earth. Checked ignition switch all appears normal. The drawing I have shows a timer relay I can't find it and not sure what it does.

My understanding is that the red/black wire is energised and when the white wire is energised from starter motor the solenoid retracts when the starter is released the 12v on the red/black wire 'holds' the solenoid retracted. I tested the solenoid with a 12v supply and got the above findings. Also tried a new solenoid and not surprisingly same result.
Is there possibly a blip in the 12v supply to red/black wire as key is turned back and thus allowing the solenoid to extend?
Can't figure it out at all any ideas?
Matt

 

[KennyV]

You have the function right... I do not recall the color code on the wiring.
There are both types of solenoids on Kubota engines. The 3 wire, with pull and hold windings. And the two wire, with a timer plus the solenoid used to shut off the fuel.
I have both types. The energize to shut off is on my L4200 tractor and the energize to turn on the fuel is on my ZTR mower.
The pull windings are not designed for continuous current, as a matter of fact they will draw about 30 amps and are normally fused with a slow blow 10 amp fuse, if energized longer than 15 seconds it will take out the fuse rather than the windings.
The hold windings require only around 3 amps but it must be uninterrupted... my ZTR uses this circuit with murphey gages to shut down automatically in overheat or low oil pressure situations.
Don't know why you are not running if your hold circuit is remaining energized... ? In any case I would try to find what took out the 50 amp fuse... you may have a wire shorting out that blips the voltage too low to insure a hold... KennyV