1965-1989 Service Manual Application: 2 hp To 40hp 2 Stroke 1 & 2 cylinder engines. A Typical Mercury-Mariner Service Manual Contains The Following Chapters: Subjects may differ depending on year/model. RELATED MERCURY - MARINER OUTBOARD SEARCHES: Carburetor Models: CARBURETOR Theory of Operations Prime Start System This carburetor assembly uses the PrimeStart system for precise fuel delivery during start-up, at all temperatures. download Yamaha Grizzly 300 Manual torrent. Schenck Intecont Satus Manual download free. Two electrothermal valves are installed on the carburetor assembly. download Stihl Fs 220 Manual there. The upper electrothermal valve controls fuel flow for carburetors #1 and #2, and the lower valve controls fuel flow for carburetors #3 and #4.

Before 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. During start-up, the electrothermal ram (needle) is still retracted (the fuel enrichment valve is opened) according to the temperature, allowing a rich air/fuel mixture to be fed to the cylinders. After 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. As the wax heats up the electrothermal ram (needle) begins to extend, partially closing the fuel enrichment valve, and reducing the flow of fuel from the float chamber into the venturi. Estimator Manual download here. After a few minutes, the electrothermal ram (needle) is fully extended, the fuel enrichment valve is fully closed, and enrichment ceases.