First, we talk about a carburetor's job of mixing air and gas to combust inside the engine.
Then we experimented with the float valve which lets the fuel into the carburetor from the gas tank.
We poured water into the funnel and opened and shut the valve by raising the float with our finger just like the valve in the back of the toilet.
We talked about how the air flow through the carburetor body sucks the fuel up the jet and into the engine.
Then the girls drew pictures of the carburetor and wrote explanations of how all the different parts worked.
Carburetor lesson and blog post courtesy of Daddy