Carburetor Specifications

(Difference between revisions)

Revision as of 23:13, 23 June 2010

Hitachi DCx carburetors have different specifications depending on market, year, state and other factors. All A-series engines used Hitachi DCx-306 carburetors 26/30 bores, except for the A10 engine which used a smaller DCG-286 model with 26/28 bores. A12 carburetors have 20/26 primary/secondary venturis, and other engines used bigger venturis up to A15s which have bigger 21/27 or 23/27 venturis.

• DCG - manual choke
• DCH - electric automatic choke

Instruction Sheet

Hitachi DCH306 ID boss

Hitachi DCH306

North American Models

Australia Model Specifications

Hitachi DCG-306 (G indicated manual choke)

NOTE: B310 A15 uses DCF-306, which differs from DCG as follows:
* vacuum secondaries, instead of counterweighted secondaries
* replaceable sight glass with O-ring
* modified choke fast idle system

Datsun B310 (source: Gregory's)
Venturi
  primary, A12: 20 mm
  primary, A14: 22 mm
  primary, A15: 21 mm
  secondary, A12: 26 mm
  secondary, A14/A15: 27 mm
Main jet,
 primary, A12: 96
 primary, A14: 104
 primary, A15: 100
 secondary, A12: 150
 secondary, A14: 150
 secondary, A15: 145
Main air bleed
 primary, A12: 80
 primary, A14: 65
 primary, A15: 70
 secondary, A12: 80
 secondary, A14: 60
 secondary, A15: 80
Slow Jet
 primary, A12: 43
 primary, A14: 46
 primary, A15: 43
 secondary, A12: 50
 secondary, A14: 50
 secondary, A15: 70
Slow air bleed
 primary, A12: 220
 primary, A14: 170
 primary, A15: 100
 secondary, A12: 100
 secondary, A14: 100
 secondary, A15: 100
Power jet
 A12: 60
 A14: 60
 A15: 40

Japan Market Specfications