A mechanical fuel pump powered by a belt connected to the engine’s crankshaft is a common component in many internal combustion engines, particularly older vehicles and some specialized applications. This type of pump uses the rotational energy from the crankshaft to drive a diaphragm or lever-based pumping mechanism, drawing fuel from the tank and pushing it to the carburetor or fuel injectors. A simple example can be found in many classic cars where a belt visibly connects the pump to the front of the engine.
These pumps offer reliability and simplicity, often requiring minimal maintenance. Their mechanical nature makes them independent of electrical systems, which can be advantageous in certain situations. Historically, this method was the standard for fuel delivery in gasoline engines before the widespread adoption of electric fuel pumps. They continue to be valuable in applications where electrical power availability might be limited or where a robust, self-contained system is preferred.
