1. Fuel Shutoff Valve Problem:
* Stuck Closed: The fuel shutoff valve (often a lever or knob) might be stuck in the closed position, preventing fuel from reaching the carburetor.
* Broken Valve: The valve itself could be damaged, preventing proper operation.
2. Fuel Pump Failure:
* Not Pumping: The fuel pump might be malfunctioning, failing to transfer fuel from the tank to the carburetor.
* Diaphragm Leak: A hole in the diaphragm within the fuel pump can cause a loss of pressure and prevent proper fuel delivery.
3. Clogged Fuel Lines:
* Dirt or Debris: Fuel lines can become clogged with dirt, rust, or other debris.
* Ethanol Damage: Ethanol in gasoline can degrade fuel lines over time, leading to blockages.
4. Clogged Fuel Filter:
* Dirty Filter: The fuel filter, located near the tank, can become clogged, restricting fuel flow.
5. Carburetor Problems:
* Clogged Jets: The small jets inside the carburetor can become clogged with debris, preventing fuel from entering the engine.
* Float Problem: The float inside the carburetor might be stuck, preventing the carburetor from drawing fuel properly.
Troubleshooting Steps:
1. Check Fuel Shutoff Valve: Ensure the valve is open. If it's stuck, try to free it or replace it.
2. Inspect Fuel Lines: Look for any signs of kinks, cracks, or blockages in the fuel lines. Replace any damaged lines.
3. Check Fuel Filter: Inspect the fuel filter for dirt or blockage. Replace the filter if necessary.
4. Test Fuel Pump: If possible, try to manually pump the fuel pump to see if it delivers fuel. If not, replace the pump.
5. Clean Carburetor: If the above steps don't resolve the issue, you'll need to remove and thoroughly clean the carburetor. Refer to your engine's manual for specific instructions.
Note: This is not an exhaustive list, and other issues might be present. If you're unsure about the cause, consulting a small engine repair specialist is recommended.
