How to Troubleshoot Briggs & Stratton Carburetor Flooding

Locate the Briggs & Stratton carburetor along the left side of the engine assembly. It will be about halfway down that side of the engine, and you can quickly identify it thanks to its distinctive bowl shape. Check for any leaking from the nut on the bottom of the carburetor bowl.

Place a pan beneath the Briggs & Stratton carburetor bowl, directly below the nut.

Unscrew and remove the bowl's nut using a socket wrench, even if you can't see visible leaking. Fuel and excess liquid will likely drain from the point where the nut is removed to your pan. Wait for all of this drainage to collect in the pan before removing it.

Remove any bolts securing the Briggs & Stratton carburetor bowl, using your socket wrench. Twist off the bowl with your hand now that its nut has been removed. Clean out the inside of the bowl thoroughly with a cloth and carburetor cleaning solution to remove any excess liquid left over after the draining.

Twist the Briggs & Stratton carburetor bowl back into place. Replace the nut in the bottom of the bowl, as well as any bolts, using your socket wrench.

Check for any oil leaking out of the mower's air filter, which is located on the end of the carburetor bowl assembly on the left side of the mower. Take out the screws securing the filter to the rest of the carburetor, using a Phillips screwdriver. Some air filters may be secured with bolts, which you need to remove with the socket wrench.

Clean the end of the air filter with carburetor cleaning solution and warm water. Reattach the filter to the mower using your screwdriver and wrench.