What is the primary function of a carburetor in an engine?

What is the primary function of a carburetor in an engine?

• A. To regulate ignition timing
• B. To mix air and fuel in the correct ratio for combustion
• C. To filter intake air
• D. To exhaust combustion gases

Answer: (B)

The primary function is to mix air and fuel in the correct ratio for combustion. The carburetor meters how much air enters the engine and, as air flows through a venturi, it creates a pressure drop that draws fuel from the float bowl through jets or metering circuits. The throttle controls how much air is allowed in, and the carburetor adjusts the amount of fuel to match that air flow, delivering a combustible air-fuel mixture to the cylinders for efficient burning. If the mixture is too rich or too lean, performance and efficiency suffer. The ignition system handles spark timing, the air filter cleans incoming air, and the exhaust system removes burned gases, so they’re not functions of the carburetor.

The primary function is to mix air and fuel in the correct ratio for combustion. The carburetor meters how much air enters the engine and, as air flows through a venturi, it creates a pressure drop that draws fuel from the float bowl through jets or metering circuits. The throttle controls how much air is allowed in, and the carburetor adjusts the amount of fuel to match that air flow, delivering a combustible air-fuel mixture to the cylinders for efficient burning. If the mixture is too rich or too lean, performance and efficiency suffer. The ignition system handles spark timing, the air filter cleans incoming air, and the exhaust system removes burned gases, so they’re not functions of the carburetor.