ROCHESTER CARBURETORS

Bulletin 9C-313 15 February 1957

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     Rochester Carburetors

MODEL 2G 1955-57 CHEVROLET V-8 TRUCK

 

     ADJUSTMENTS AND SPECIFICATIONS

BULLETIN 9C-313
PAGE 3 OF 4 DATE: 2-15-57
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1955 SETTING- 1-5/32", GAUGE-BT-107 1956-57 SETTING- 1-1/4", GAUGE-BT-129
With the air horn inverted and the gasket in place, position the float level gauge over the float so that it rests against the pump side of the power piston shaft, with the outer gauge leg in line with the center of the float. Do not compress spring in needle valve but allow the float to hang freely.
Bend the float arm until the float just touches the bottom of the gauge, (use Bending Tool BT-69).
1955-56-57 SETTING- 1-29/32", GAUGE BT-107, BT-129
The float drop is correct when the distance from the air horn gasket to the bottom of the float is 1-29/32", with the air horn held upright.
Bend the float tang to adjust; toward needle seat to lessen drop and away from seat to increase drop.
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1955 SETTING- 15/16", GAUGE BT-107 1956-57 SETTING- 57/64", GAUGE BT-129
Back off the throttle stop screw and hold the throttle valves completely closed. Check the distance from the top of the air horn casting to the top of the pump rod with the combination fioat and pump rod gauge.
To adjust, bend the pump rod with Bending Tool BT-18.
CO, WD, 131, 149, 9X, 9FR
FORM 1234 I.P.S. PRINTED IN U.S.A.

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