A carburetor is a mechanical device in gasoline internal combustion engines that mixes air and fuel in the correct ratio before sending the mixture into the engine cylinders for ignition and power generation. It sits atop the engine, beneath the air filter, and operates using vacuum power and cable control linked to the gas pedal. When the throttle opens, air is drawn through a narrow passage called a venturi, which increases air velocity and creates a vacuum that pulls fuel from a float chamber through jets. The fuel atomizes and mixes with the incoming air, and this fuel-air mixture then enters the engine cylinders where it is ignited by spark plugs, producing the power to move the vehicle
. The carburetor essentially controls the engine’s power output by regulating the amount of air and fuel entering the engine. More throttle opens the carburetor more, increasing air and fuel flow, which results in more engine power. Carburetors are purely mechanical and do not use electronic sensors, unlike modern fuel injection systems, which makes them simpler but generally less efficient and less precise
. In summary, the carburetor's main function is to blend air and fuel properly for combustion, acting as the heart of the engine's fuel system in older vehicles and many small engines
