What exactly does the fuel shutoff solenoid do on the bottom of the carb? A neighbor has a JD L105 lawn tractor. All of a sudden it started shutting off and surging real bad whenever it gets hot. They read somewhere that the fuel shutoff solenoid can cause this. They were going to simply unplug it but apparently it is in series with something because when unplugged the engine won't start.
So to disable it they took it out, cut off the plunger and reinstalled it. They felt comfortable with this drastic action because you can get a replacement for $8.00 on Ebay. The good news is this seemed to cure the shutting off and surging problem BUT... now the engine won't shut off at all. They had to choke it to stop the engine.
Now I always thought those little solenoids were to stop back firing by cutting off the fuel the moment you turned off the key. But are they the only thing that stops the engine? Wouldn't turning the key to off also remove power from the ignition circuit?
They've already ordered a replacement and it should be here today but I am curious why the engine would not shut off with the solenoid disabled.