Unlock the Right Part
for Your Repair
Find the exact part you need
Enter your model number to see parts that fit your machine.
Choose Product
Identify Problem
03
Find Solutions
HomeRepair HelpBriggs & Stratton RepairBriggs & Stratton Small engine leaks gas Repair
Briggs & Stratton Small engine leaks gas
If your Briggs & Stratton small engine is leaking gas, start by checking the carburetor, where a dried-out or missing carburetor gasket is the most likely cause, especially when gas is leaking from the bottom of the carburetor. Next, inspect the carburetor float bowl gasket and carburetor bowl gasket for damage or shrinkage. Stale or ethanol-blended fuel left in the carburetor is a common root cause of small engine leaking gas because it can damage gaskets and other fuel-system parts. If the carburetor is dry, inspect the fuel tank for cracks, then check the fuel line for splits, brittleness, or loose connections. A cracked primer bulb can also cause an engine fuel leak and should be replaced rather than patched. Never attempt to repair a leaking fuel tank, fuel line, or primer bulb. Shut off the fuel, work in a well-ventilated area away from flames, and clean spilled gasoline before testing the repair. Enter your model number to find the exact replacement carburetor gasket, float bowl gasket, fuel tank, fuel line, or primer bulb for your Briggs & Stratton small engine.
01 - Briggs & Stratton Carburetor Gasket
The carburetor gasket might be dried out or missing. If the leak is coming from the bottom of the carburetor, try replacing the carburetor gasket.
Enter model number to search for the required part specific to your product
Top Solution
02 - Briggs & Stratton Float Bowl Gasket
The carburetor float bowl gasket might be dried out or missing. If the leak is coming from the bottom of the carburetor, try replacing the carburetor float bowl gasket.
Top Solution
03 - Briggs & Stratton Carburetor Bowl Gasket
The carburetor bowl gasket might be dried out or missing. If the leak is coming from the bottom of the carburetor, try replacing the carburetor bowl gasket.
Top Solution
04 - Briggs & Stratton Fuel Tank
The fuel tank might be cracked or have a small leak. Inspect the fuel tank for leaks. If there is a leak, replace the fuel tank—do not attempt to repair it.
Top Solution
05 - Briggs & Stratton Fuel Line
One or more of the fuel lines may have a leak. Inspect the fuel lines for cracks. If any of the fuel lines are cracked or dry, replace them. Do not attempt to repair a fuel line—if a fuel line is cracked, you must replace it.
Top Solution
06 - Briggs & Stratton Primer Bulb
The primer bulb may be leaking. Over time, the rubber of the primer bulb can become brittle and cracked, causing the bulb to leak gas. If the primer bulb is leaking, replace it. Do not attempt to patch or repair the primer bulb.
Highly Likely
07 - Briggs & Stratton Carburetor
Over time, the carburetor may develop cracks due to the vibration and heat of the engine. If the carburetor is cracked, it will leak fuel. Inspect the carburetor for cracks or corrosion. If the main body of the carburetor is leaking, you will most likely need to replace the carburetor.
Common
Frequently Asked Questions
Why is my Briggs & Stratton small engine leaking gas?
What should I check if gas is leaking from the bottom of the carburetor?
How do I find the source of a Briggs & Stratton engine fuel leak?
Can old gas cause a Briggs & Stratton carburetor to leak?
How do I identify the correct Briggs & Stratton fuel leak part?