Idle Stop Solenoid

Idle stop solenoid is a two-position electrically operated control, used to provide idle speed as predetermined by adjustment of plunger. In energized position (ignition On, plunger extended) plunger contacts carburetor throttle lever and prevents full closing of carburetor throttle plates. This idle control, when de-energized (ignition Off, plunger retracted), allows throttle plates to close beyond normal idle position; thereby shutting off air supply and starving engine so that it will shut down without dieseling.