What to Do If Your Portable Generator Is Leaking Fuel in St. Louis

If your portable generator is leaking fuel, immediately turn it off, close the fuel valve, move it outdoors to a flat, non-carpeted area, contain and clean up the spill with absorbent material, then inspect hoses, connections, and the fuel tank for damage. Tighten loose fittings or replace worn parts, refill with fresh fuel, and test to ensure no more leaks. If you can’t find the source or the leak continues, contact a qualified technician.

 

Understanding Why Fuel Leaks Happen

 

A fuel leak is when gasoline or diesel escapes from the tank, hose, valve, or engine fitting. Common causes include:

• Worn Hoses: Over time rubber hoses can crack or become brittle.
• Loose Fittings: Vibration or poor installation can let connections back off.
• Damaged Seals or Gaskets: These small rubber rings keep fuel from escaping where parts join.
• Cracked Fuel Tank: Dropping or bumping the generator may crack the tank surface.

 

Ensuring Your Own Safety First

 

Fuel is highly flammable and toxic if inhaled. Before doing anything:

• Wear gloves and safety goggles.
• Do not smoke or allow sparks or open flames nearby.
• Keep children and pets away until clean-up is done.

 

Shutting Down and Relocating the Generator

 

• Turn Off the Engine: Use the stop switch or key so no more fuel pumps into the engine.
• Close the Fuel Valve: This small lever under the tank controls the flow of fuel. Turn it off to stop dripping.
• Move It Outdoors: Place on a level concrete or gravel pad—never on carpet, wood, or near walls—to allow fumes to disperse.

 

Containing and Cleaning the Spill

 

• Sprinkle absorbent material (kitty litter, sand, or commercial pads) over the puddle.
• Let it soak for at least 15 minutes.
• Sweep the used absorbent into a sealable metal container.
• Dispose of it according to your local hazardous-waste rules.

 

Inspecting for the Leak Source

 

• Look under the generator with a flashlight.
• Check all hose connections—where the tank meets the carburetor or fuel pump.
• Examine the fuel tank for cracks or rust spots.
• Feel hoses for soft spots or areas that collapse when squeezed.

 

Repairing or Replacing Damaged Parts

 

• Tighten any loose nuts or hose clamps with a wrench or screwdriver.
• Swap out cracked hoses or broken fittings. Get exact replacement parts from a hardware store or generator dealer.
• Replace worn gaskets or seals at joints—it’s a small rubber ring that seals two metal parts.
• If the tank itself is cracked, install a new tank or have a technician weld or epoxy-seal the crack if appropriate.

 

Refilling and Testing for New Leaks

 

• Refill the tank with clean, fresh fuel—old gasoline can gum up parts and cause leaks.
• Open the fuel valve and let fuel settle for a minute.
• Start the engine according to the manual.
• Watch all connections closely. If you still see drips, shut it down immediately and repeat the inspection.

 

Preventing Future Leaks

 

• Perform regular checks of hoses, fittings, and the tank—ideally every month or after heavy use.
• Store the generator in a dry place out of direct sunlight to keep rubber parts from drying and cracking.
• Always place the generator on a flat surface to reduce stress on hoses and valves.
• Run the generator periodically to circulate fuel and catch any early signs of wear.

 

When to Call a Professional

 

• If you cannot find the leak source after basic checks.
• If fuel is spraying under pressure or you hear hissing noises.
• If you lack the tools or comfort level to replace parts yourself.

Hoffman Brothers is a full-service residential & commercial provider in St. Louis and Nashville, offering generator repair and safety inspections when you need reliable, expert help.