DCR306

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For 1981 North American sunny models, the "new" DCH306 carburetor - the Hitachi DCR306 -- is introduced

• Vacuum-controlled Secondary Throttle actuator added
• Replaceable fuel bowl sight-glass added
• Vented fuel bowl incorporated

1981

New type sight-glass introduced. This type is replaceable unlike previous versions.
sight glass

Fuel bowl is now externally vented. This goes to a special 5-hose Charcoal Canister. The canister has a Vent Switching Valve which is open when the engine is not running, so that vapors from the fuel bowl can go directly to the charcoall filter. When the engine starts, vacuum from the intake manifold closes the VSV.

See main article: Carbon Canister

Altitude Compensator ports marked 1,2,3
photo

Vacuum-Secondary introduced
4, 3, 2 are used on Altitude Compensator models

1982

X, 2 are plugged; only used on Altitude Compensator models

Versions

DCR306 numbering appears to be continued from DCH306 versions.

B310
DCR306-100 1981 FED A12A
DCR306-101 1981 FED A15 MT
DCR306-102 1981 FED A15 AT
DCR306-104 1981 FED A14 MPG
DCR306-106 1982 FED A12A
DCR306-107 1982 FED A15 MT
DCR306-108 1982 FED A15 AT
DCR306-109 1982 FED A14 MPG
DCR306-110 1981 CAL A12A
DCR306-111 1981 CAL A15 MT
DCR306-112 1981 CAL A15 AT
DCR306-116 1982 CAL A12A
DCR306-117 1982 CAL A15 MT
DCR306-118 1982 CAL A15 AT
DCR306-120 1981-1982 CAN A12A
DCR306-121 1981-1982 CAN A15 MT
DCR306-122 1981-1982 CAN A15 AT

N10
DCR306-103 1981 FED A15S 16010-M6660 

Applications

1981-1982 B310 w/A12A,A14,A15
1983 B11 E15S
AND MORE???