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!
When the engine quits, do you have spark? Or it it loosing fuel? If spark is gone, then the ignition system, speed control can be bad. Or is the engine equipped with the OilGuard system , to kill spark because of low oil pressure? Would use the service manual to check it. But if it has spark, is the fuel solenoid in the carburetor opening? It can overheat or loose voltage and kill the fuel. Here is link to service manual.