Fast Idle System

Faster idle during warm up time is controlled by position of fast idle cam. When cold, cam is in position so that stop is against high step of cam. As choke plate opens progressively, fast idle cam pivots and fast idle adjustment screw rests on the next step. Lowering down, step by step, of fast idle adjustment screw causes, through its connecting link, a pivoting of accelerator control. This pivoting motion results in progressively reducing the partial opening of throttle plate. This continues until choke plate is fully open, and engine operates at a normal idle speed at operating temperature, as regulated by the idle adjustment screw.