Checking Altitude COMPENSATOR

NOTE: Altitude compensator must be checked at altitudes of 1640-4920 feet.

1. Remove air cleaner and start engine. Engine should run smoothly at specified idle. Place finger over slow port on carburetor air horn; idle speed should drop (altitude of 1640-4920 feet).
2. If idle speed did not drop, remove compensator valve and blow through both ports. At altitude of 1640-4920 feet, air should pass through compensator valve. If not replace altitude compensator valve.

Fig 1: Adjusting Accelerator Cable and Pedal Height

Courtesy of MAZDA MOTORS CORP.