How do you fix sticking float 18hp Briggs?

To fix a sticking float on an 18hp Briggs & Stratton engine, first remove the carburetor and inspect the float and needle for dirt or damage. Clean the carburetor thoroughly with carburetor cleaner, ensuring all passages are clear. Check the float for proper movement; if it's damaged or heavy with fuel, replace it. Reassemble the carburetor, making sure the float and needle seat properly, and then reinstall it on the engine.