Idle Mixture Adjustment

1. Allow engine to reach normal operating temperature.
2. Check ignition timing for proper adjustment.
3. Remove air flow sensor.
4. Remove tamper resistant plug by using a suitable drill bit. Make a small hole in the plug, then remove plug using a suitable tool.
5. To richen the mixture, turn screw in one full turn. To lean out the mixture, back out screw one full turn.
6. Install a new tamper resistant plug on air flow unit.