- The fuel-air mixture used when a reciprocating engine is at idling speed. This mixture is richer than that required for the best burning because of an uneven distribution of the fuel-air mixture at idle speeds.
Aviation dictionary. 2014.
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idle mixture — The mixture of air and fuel (usually about 14:1) being fed to the cylinders … Dictionary of automotive terms
idle mixture adjustment screw — See idle mixture screw … Dictionary of automotive terms
idle mixture screw — A tapered screw located on the outside of the carburetor which controls the proportion of the fuel air mixture. It is now illegal to adjust these if limiter caps are present. If you turn the screw clockwise, the mixture will be leaner while… … Dictionary of automotive terms
off-idle mixture — The fuel air mixture ratio given by a fuel metering system during the period when the engine is transitioning from its idle RPM to a speed at which fuel is metered by the main metering system … Aviation dictionary
mixture —  A substance made up of two or more chemicals in some proportion.  A fuel air mixture in an internal combustion engine.  The combination of oil and gasoline in the fuel tank of a two stroke engine, e.g., 1:50, i.e., one part of oil is… … Dictionary of automotive terms
idle discharge hole — Used on carbureted vehicle. The hole through which the idle mixture enters the airstream flowing past the throttle plate. Also called curb idle port … Dictionary of automotive terms
idle jet — A carburetor jet within the idle system which supplies a constant amount of fuel for the formation of the idle mixture … Dictionary of automotive terms
idle limiter cap — An external plastic cap on the head of the idle mixture adjustment screw to maintain preset emissions levels and prevent unauthorized tampering … Dictionary of automotive terms
mixture adjustment screw — See idle mixture adjustment screw … Dictionary of automotive terms
mixture control screw — See idle mixture screw … Dictionary of automotive terms