How does an updraft carburetor work?

An updraft carburetor operates by drawing air upward through the carburetor's throat, where it mixes with fuel from the float chamber. As air flows through the narrow throat, it creates a vacuum that draws fuel into the airstream, atomizing it for efficient combustion. This design is commonly used in older engines and some aviation applications, as it allows for better fuel distribution and helps prevent flooding by keeping fuel below the air intake. Overall, the updraft carburetor effectively balances air and fuel for optimal engine performance.