Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Is there a solenoid in the carburetor ? It would be a solenoid that closes the main jet when key is off. It has to open as soon as the key is turned on, and has to stay open , or engine will die. Requires 12 volts at all times. It can be failing, Best test is to remove it and plug the hole. assume when the mower stops the starter is still turning th engine, it just ill not fire.