Carburetor Overview

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The Datsun 1200 uses a Hitachi carb, model Hitachi DCG-306 (manual choke) or DCH-306 (automatic choke). This is a modern, two-barrel progessive linkage carburetor. It used bore sizes of 26/30 and venturis of 20mm (primary) and 26mm (Secondary). Datsun 1200 GX models used twin Hitachi 38 sidedraft carburetors with a manual choke system.

Hitachi numbers indicate the primary bore * secondary bore sizes:

Hitachi DCG306
  G = manual choke | H = automatic choke
 30 = 30mm secondary bore
  6 = 26mm primary bore

Links

Hitachi DCx carbs were used on, among others:

* 1967-1970 Datsun B10 (DCG286)
* 1970-1973 Datsun B110 (DCG306 and DCH306)
* 1973-1980 Datsun L-series (Hitachi DCH340)
* 1973-1980 Datsun B210
* 1977-1982 Datsun B310
* 1973-1975 Honda Civic
* 1976-1979 Mazda 323
* 1983-1985 Ford Laser (DCT306)

See Also:

• Fuel System Category Page
• Carburetor Adjustment
• Carburetor Repair
• Carburetor Specifications
• Carburetor Diagnoses Diagnoses and Corrections
• Carburetor Swaps
• Weber 32/36 Carburetor
• Weber DCOE carburetor

NOTE: The B10 Datsun 1000 used a smaller carb, the Hitachi DCG-208.

ID boss:

DCG-306

DCG is the manual-choke series.

1971 vs 1972

DCH-306

DCH is the Automatic Choke series.

1977 USA

Vacuum Secondary

DCH-306 with vacuum-operated secondary throttle. 1981-1982 USA models.

DFC306

Feedback carburetor DFC306 is the carburetor on 1989-1994 JDM A12 engines. It requires a special water heated Intake Manifold and ECU control.

See main article: DFC306

DCK