Idle Speed & Mixture (One Carb. Engines): Rambler

With transmission in Neutral and Air Conditioner ON (when used), adjust both idle mixture screws equally by turning screws out until engine speed begins to drop off, then turn screws in until maximum engine speed is obtained and continue to turn screws in until engine speed begins to drop off due to lean mixture, finally turn screws out just enough to secure maximum engine idle speed (this will assure a "lean as possible" setting). Readjust idle speed. If necessary to change idle speed more than 50 RPM, repeat idle mixture adjustment.