All non-supercharged fuel pumps have a 1/4″ elbow 12S733 at the sediment bowl pointed down.
From the sediment bowl going toward through the pump, the fuel outlet exits right or towards the hood; not straight or left toward the engine block.
The outlet fitting for all fuel pumps is a 5/16″ straight fitting 12S734.
The 850X and all 6 cylinder cars have a 24″ x 5/16″ copper 2S5048 fuel line from the pump to the carburetor.
The carburetor has an inlet elbow fitting 12S734 and inverted flare nut 12S704.
850X, 850Y, 851, 852 non-supercharged, starting in 1934 Auburn fit Stewart Warner fuel pumps J10195, marked 706D.
Sometime in the 1935 model year a switch was made to AC fuel pump J10425, which is pump number 2146.
Both pumps bolt in with no modification.
Gasket for both is J1-253 to the crankcase.
Pump is secured with two SA506 hex head cap screws marked W, and two 11S2 copper asbestos washer gaskets.
8 cylinder non-supercharged fuel pumps sit at a 45 degree angle forward on the block.
652, 653, 654 started in 1934 Auburn fit with Stewart Warner fuel pumps J10207, marked 708D.
Sometime in the 1935 year a switch was made to AC fuel pump J10351, which is pump number 1814.
Both pumps bolt in with no modification.
Gasket for both is J1-253 to the crankcase.
Pump is secured with two SA506 hex head cap screws marked W, and two 11S2 copper asbestos washer gaskets.
The 6 cylinder fuel pump is different from 8 cyl in that it is actuated by a plunger J10213 that slides in bushing A90433, which is horizontal in the crank case and actuated by the cam shaft. The pump is mounted in such a way that the sediment bowl points forward or parallel with the block.
Input Line Fittings for non-supercharged fuel pumps use:
- Input 1/4″ inverted flare elbow 12S733
- 1/4″ inverted flare nut 12S703
Fuel Line Output: fuel pump to carburetor
- One 12S724 5/16″ Inverted Flare inlet straight fitting on fuel pump
- One 12S734 inverted flair elbow on the carburetor
- Two 12S704 5/16″ Flare Nut
- One on the fuel pump
- One on the carburetor
- Fuel Inlet tube 2S5048 from the fuel pump is 5/16″ copper
- 24 inches long on 850Y, 851, 852, 8 cyl non-supercharged