I have an m120 that when you turn the key off it keeps running, you have to use the mechanical lever to shut the engine down. I have been told the fuel shut off solenoid has probably failed. Can someone tell me where this solenoid is? Is there a way to test it? Also I am having trouble with the 3pth, sometimes the idiot light on the dash flashes rapidly and the only way I can raise or lower it is with the swich on the fender. It seems to me that it does it more often when it's raining or more humid? I don't know where the electronics are for any of this, can someone please help out a new guy? Thanks for any advice. Jay