Fuel Specs - CJ-3B

Fuel system illustration shown for reference only - click here to shop for these parts by interactive diagram

Fuel System Diagram

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Fuel Tank Specs:
Capacity 10 1/2 gal.
Location Under Driver's Seat
Fuel Pump Specs:
Make AC
Model 5594032
Type Camshaft
Pressure 2 1/2" to 3 3/4 lb.
Carburetor Specs:
Make Carter
Model YF-938 SD
Flange Size 1 1/4"
Primary Venturi 11/32"
Secondary Venturi 11/32"
Main Venturi 1 1/4"
Float Setting 5/16"
Gasoline Intake Needle Seat No. 48 (.076") drill
Jet Size No. 70 (.028") drill
By-Pass No. 56 (.0465") drill
Idle Bleed No. 56 (.0465") drill
Economizer No. 54 (.055") drill
Idle Well to Bowl Bleed No. 73 (.024") drill
Idle Port .184" x .030"
Lower Port (for idle adjustment screw) 3/4 to 1 3/4 turns open
Main Nozzle Anti-Percolator
Well Vent in Plug No. 74 (.0225") drill
Metering Rod .07325" x .0655" x .057" x .04725"
Metering Rod Jet .0935" dia.
Accelerating Pump Specs:
Pump Jet No. 68 (.031") drill
Intake Passage No. 72 (.025") drill
Discharge Check Seat No. 42 (.0935") drill
Vacuum Restriction No. 55 (.052") drill
Vacuum Passage (Diaphragm Bleed) No. 65 (.035") drill
Vacuum Spark Port .054" to .056 dia.
Air Cleaner Specs:
Make Donaldson
Model 1038A36
Type Oil Bath
Oil Capacity 1 1/4 pt.

* Learn more about the Fuel System from the Service Manual for Universal Jeep Vehicles page 93, 94