The DCO carburettor model is a classic downdraft carburettor manufactured and designed by Weber. It is a single-throat carburettor that is commonly used in smaller displacement engines.

The DCO carburettor provides excellent fuel economy and reliable performance, making it a popular choice for street applications. The DCO model is ideal for engines with moderate performance needs, and its compact design allows for easy installation in tight engine compartments.

The main benefits of the DCO carburettor include its ability to provide reliable performance under normal driving conditions as well as the carburettor's compact design.