The Emulsion Tube/Main Jet sits below the fuel bowl. This results in the emulsion tube and main jet to constantly have fuel pressure against it. The original design relies on the mating surfaces between the carburetor body and the main jet/emulsion tube to be perfect in order to provide a seal between each other. As corrosion and age set into your carburetor, this seal is often compromised. Since fuel is always being pulled down toward the main jet area, fuel will continuously leak out causing an overly rich air/fuel mixture, and loss of fuel.
As the piston in your engine moves downward it creates a vacuum which draws in air through the intake end of the carburetor. As the air travels through the venturi, the air’s pressure drops, and fuel is drawn down from the fuel bowl, and then back up through the main jet and emulsion tube. The low pressure air mixes with and atomizes the fuel. This air/fuel mixture continues through the intake valve and into your combustion chamber.
D-42 - Engine Wiring Diagram Specialist
Copyright © 2003 - 2018 Domain Media. All sponsored products, company names, brand names, trademarks and logos arethe property of their respective owners.