Dictionary of automotive terms. 2015.
idle mixture adjustment screw — See idle mixture screw … Dictionary of automotive terms
mixture screw — See idle mixture screw … Dictionary of automotive terms
screw — [1] A spiral path along a cylinder. [2] A fastening device. A screw is like an inclined plane wrapped up. It can take a rotating force and change it into a much larger straight line force. See adjusting screw aiming screw air bleed screw air… … Dictionary of automotive terms
mixture — [1] A substance made up of two or more chemicals in some proportion. [2] A fuel air mixture in an internal combustion engine. [3] 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
mixture control screw — See idle mixture screw … Dictionary of automotive terms
mixture adjustment screw — See idle mixture adjustment screw … 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
idle system — At idle speed, the throttle valve is closed to such an extent that the airflow underneath the plunger no longer forms a sufficient vacuum; the fuel is then supplied via an auxiliary system, the idle system, which consists of the idle jet, the… … Dictionary of automotive terms
adjustment screw — See idle mixture adjustment screw … Dictionary of automotive terms
adjustable off-idle air bleed — Some emissions era Rochester carburetors have a separate air passage to bleed air past an adjustment screw into the idle system. this screw is preset by the factory to produce precise off idle air/fuel mixture ratios to meet emission control… … Dictionary of automotive terms
