NOTE: Lubricate the valve pads with molybdenum disulfide before installing. Select a proper replacement valve pad by calculating its thickness with the following formula. The in-line, one-way valve prevents the air in the hoses from flowing back to the dashpot.Īlso, the diaphragm functions as a coasting enrichener during quick deceleration, preventing the engine form stalling. This airfuel mixture is then injected into the venturi, ensuring that enough fuel reaches the engine. This additional air flows into the carburetors and mixes with the fuel from the main jets. (Click here to download the FREE Acrobat Reader program. The air flows through the in-line, one-way valve, and then to all of the carburetors. In order to download/view the manuals you must have the Adobe Acrobat Reader installed on your computer. The throttle lever link rod then pushes the diaphragm in the dashpot, forcing out the air. The upper electrothermal valve controls fuel flow for carburetors 1 and 2, and the lower valve controls fuel flow for carburetors 3 and 4.īefore start-up, the electrothermal ram (needle) is retracted (the fuel enrichment valve is opened) according to the temperature, allowing a high percentage of fuel to flow form the flat chamber into the venturi during start-up.Īfter start-up, the current supplied form the electric power source and then flows to the electrothermal valves causing the wax in the valves to heat up.Īs the throttle is opened, the throttle lever rotates and pushes the throttle lever link rod. Two electrothermal valves are installed on the carburetor assembly.
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