Idle Adjustment

Idle adjustment must not be carried out until engine has reached normal operating temperature.

1. Attach tachometer and suitable exhaust gas analyzer. Set idle adjustment to 900 RPM with headlights on and in low beam position.
2. Adjust mixture control screw to obtain a reading of 1.5-2.0% CO. Turn screw clockwise to obtain a lower CO content and counterclockwise to increase it. Recheck idle speed and adjust if necessary.