Small Engine Troubleshooting Problems? Ask a Mechanic Now.
How about the electric solenoid in th e base of the carburetor. It has to have 12 volts to stay open. Listen for the click when you turn the key on and off and engine is cold. Learn what it sounds like. Then when engine quits, turn key on and off,listening for the click. No click, no fuel. It can be heating up, and cutting off the fuel.