Carburetor is actually a motor module in charge of supplying the engine's oxygen/gasoline mixture into the cylinders, where heat from spark plugs ignites this mixture. Pressure from the air going thru the intake propels the fuel and oxygen into the engine's combustion chambers. Alcohol free fuel is recommended, as the alcohol in modern fuel can deteriorate the seals in the carburetor. To supply fuel itself before reaching the engine, the fuel rail is filled from a fuel line that is ran from the fuel tank via fuel pump