QUESTION: There is a clear green hose that runs from the fuel pump to the top of the carburetor on my MerCruiser stern-drive. It does not seem to have a purpose. Why is it there? ANSWER ...

For truly extreme engine combos, Holley offers the inline Dominator pumps. The standard version supports 1,400 hp in EFI fuel systems, and 1,800 hp with a carb fuel system. The high-flow Dominator ...

On older vehicles, the pump sends fuel to a carburetor. Automobiles have primarily transitioned away from mechanical pumps on the engine block in old cars to electric pumps inside the gas tank on ...

A properly operating mechanical fuel pump should supply between 3 and 8 psi to the carburetor. In most rockcrawling situations the engine operates at idle or just off idle, so the pump may force ...

For the millions of Pontiac V-8s that left the engine assembly plant, the mechanical fuel pump was the unsung hero that received little notoriety. It quietly supplied the carburetor with an ...

The carburetor then spread to be the primary ... With even higher-pressure secondary fuel pumps, direct injection sends highly atomized fuel directly into the cylinder with precision, to further ...