how the engine works carburettor videos

Carburetted systems in cars

http://www.youtube.com/watch?v=noOMaIHNknY&feature=related

How a carburetor works, schemes and explanations

http://www.youtube.com/watch?v=zUuVQfvWSnI

SI engine carburetor

http://www.youtube.com/watch?v=p95ZNM24A5w