The leads which enter the black heat shrink tubing end is the hall sensor. It plugs into the sensor casing, and is secured with the small rubber wedge (small plastic bag). Before you secure the sensor however, check operation, because the sensor is polarity sensitive.. If it does not work when passing over the magnet, flip over the sensor.

The ignition must be set to fire at 28° before top dead center when the prop is rotated slowly.

Use only 4 cell packs. More voltage will only heat up the ignition.

ignition cap replacement instructions: