Generator is leaking gasoline

Symptoms

• Fuel smell around the generator when not running
• Visible wet spot or drip under the fuel tank or carburetor
• Fuel overflowing from the carburetor overflow tube
• Gasoline pooling after fueling

Likely causes

• CommonOverfilled fuel tankFilling above the recommended line leaves no room for expansion and can overflow, especially in heat.
• CommonCracked or perished fuel lineRubber fuel lines age, crack, and leak, especially with ethanol-blend fuels over time.
• CommonCarburetor float stuck open, flooding the bowlA stuck float lets fuel keep flowing into the bowl until it overflows out the vent tube.
• PossibleLoose or damaged fuel tank cap or petcock valveA worn gasket or cracked valve body can leak even when the tank isn't overfilled.

What to do

1. Shut off the generator and move it to a well-ventilated outdoor area away from any ignition source if you smell or see gasoline.
2. Let any spilled fuel evaporate and clean up residue before doing anything else.
3. Check the fuel level isn't above the manufacturer's fill line, and don't top off right to the very top of the tank.
4. Inspect the fuel line for cracks or softness, especially near the tank and carburetor connections, and replace if compromised.
5. If fuel is dripping from the carburetor's overflow tube, the float is likely stuck; this typically needs carburetor disassembly to fix.
6. Check the tank cap gasket and fuel shutoff valve (petcock) for wear or damage.
7. Do not attempt to run a generator that is actively leaking fuel; have it repaired first given the fire risk.

Tools and parts

• Rag
• Wrench set

When to call a pro

A stuck carburetor float or a fuel line you're not comfortable replacing should be handled by a small-engine repair shop given the fire risk of getting it wrong.

Safety