Which component filters fuel before mixing with air?

• A. Air Filter
• B. Fuel Filter
• C. Venturi
• D. Carburetor Body

Answer: (B)

Fuel must be clean before it meets the mixing chamber, so filtering happens in the fuel path prior to entering the carburetor. The fuel filter sits in the fuel line ahead of the carburetor and traps rust, sediment, and other contaminants that could clog jets or nozzles and throw off the air–fuel mixture. The Venturi is the narrow passage in the carburetor that uses air flow to create suction to draw fuel in, but it doesn’t filter. The carburetor body contains passages and mechanisms for mixing fuel and air, not filtration. The air filter cleans the air entering the engine, not the fuel. So the component that filters fuel before mixing with air is the fuel filter.