B2200 Carbureted

Remove carburetor from engine. Drive out mixture screw roll pin. See Fig 1 . Install carburetor on engine. Install air cleaner and connect hoses to idle compensator, thermosensor and reed valves.

Fig 1: Removing Carburetor Mixture Screw Roll Pin (B2200)
Courtesy of MAZDA MOTORS CORP.
Warm engine to normal operating temperature. Attach dwell meter (4-cylinder setting) to mixture check connector. See Fig 2 .
Adjust idle speed to specification. See IDLE SPEED SPECIFICATIONS table. Turn mixture adjusting screw to obtain a dwell reading of 27-45 degrees. Reset idle speed (if necessary). Replace mixture roll pin after adjustment. If dwell reading cannot be obtained, see BASIC TESTING and SYSTEM/COMPONENT TESTS articles.

Fig 2: Connecting Dwell Meter to Check Connector (B2200)

Courtesy of MAZDA MOTORS CORP.