* Fuel Filter: This is the most common and easiest to check first. A clogged fuel filter restricts fuel flow, even with a good pump. Replace it with a new one.
* Fuel Lines: Check the fuel lines for cracks, kinks, or blockages. Look closely at the lines running from the tank to the pump and from the pump to the carburetor. A small hole or blockage can severely restrict fuel flow.
* Carburetor Issues (Beyond just needing gas): While adding gas directly to the carb temporarily solves the problem, there might be underlying carburetor issues. This could include:
* Float level: The float level in the carburetor might be too low, preventing proper fuel delivery.
* Clogged jets or passages: Dirt or debris can clog the jets and passages within the carburetor, restricting fuel flow. A carburetor rebuild or cleaning kit might be necessary.
* Stuck float: A stuck float could prevent the carburetor from filling with fuel.
* Fuel Pump Pressure: Even though you say the fuel pump is *working*, it may not be delivering sufficient *pressure*. A pressure gauge should be used to verify the correct fuel pressure. If low, the pump itself might be failing, even if it's making noise.
* Check Valve (in the fuel line): A faulty check valve will allow fuel to drain back into the tank, leaving the carburetor dry when the engine is off. This is less common but worth considering.
Troubleshooting Steps:
1. Check the fuel filter: This is the quickest and cheapest check. Replace it.
2. Inspect fuel lines: Look for visual damage.
3. Check fuel pressure: If you have a fuel pressure gauge, use it to measure the pressure at the carburetor. Consult your owner's manual or a repair manual for the correct pressure specification.
4. Check the carburetor: If the fuel pressure is okay, a carburetor cleaning or rebuild is likely necessary.
Important Note: Pouring gas directly into the carburetor is a dangerous and temporary fix. Gasoline is highly flammable, and you risk fire or injury. Only do this as a diagnostic test to confirm the fuel delivery system is the problem, and then immediately address the root cause.
