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LINCOLN-MERCURY

CARBURETOR MODEL 2140

OPERATION

The Holley Carburetor Model 2140 is equipped with four basic fuel metering systems. They are the main metering system, the idle system, the power enrichment system, and the accelerating pump system. These systems are calibrated to provide an efficient mixture during all phases of engine operation. In addition to those basic systems, there is a secondary system. This system increases the capacity of the carburetor to meet increases in the engine's fuel-air requirements.

There is also a fuel inlet system. It provides the fuel metering systems with a constant supply of fuel. A choke system provides a means for enriching the mixture temporarily to aid in starting and running a cold engine.

the Service Manual. A complete explanation of the various systems, therefore, will not be given in this supplement. To avoid duplication, only the points of difference between the 1953 and 1954 applications will be discussed.

1.   FUEL INLET SYSTEM

The fuel inlet system remains unchanged. A proper level of fuel is maintained in the float chamber by the action of the float and fuel inlet valve.   This specified fuel level must be maintained. The four basic fuel metering systems are calibrated to deliver the proper mixture to the engine only when the fuel is at that level.

2. MAIN METERING SYSTEM

A thorough and detailed explanation of the various fuel metering systems will be found in

There has been no change in the design of the main metering system.   Air passing through the

CODE

Picture

MAIN METERING SYSTEM -2-


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