1978-79 Models

With engine at normal operating temperature, set idle speed to specification. Place manual transmission in Neutral (automatic transmission in Drive) and connect timing light to engine. Start engine and rotate distributor until specified mark on crankshaft pulley aligns with indicator pin.
After checking and setting base timing on 1979 626 and 1978 Federal GLC manual transmission equipped models, disconnect water thermo (accelerator) switch and check advanced timing.

1978 IGNITION TIMING SPECIFICATIONS

Application

Man. Trans.

Auto. Trans.

GLC

Federal

⁽¹⁾ 7°BTDC

11°BTDC

Calif.

11°BTDC

B1800

8°BTDC

.....

⁽¹⁾	Advanced timing is 11°BTDC.

1979 IGNITION TIMING SPECIFICATIONS

Application

Man. Trans.

Auto. Trans.

GLC

Federal

7°BTDC

Calif.

5°BTDC

626 ⁽¹⁾

8°BTDC

B2000

8°BTDC

.....

⁽¹⁾	Advanced timing is 16°BTDC.

Fig 1: Typical GLC & B2000 Ignition Timing Marks

Courtesy of MAZDA MOTORS CORP.