ROCHESTER CARBURETORS

Bulletin 9C-301 1 April 1953

CHEVROLET-1932-52 Automatic Choke Carb. for 216 Cu. In. Engine CARBURETOR 7004620-SERVICE PKG. 7005060
INSTALLATION INSTRUCTIONS
1.    For 1932-1936 Replacement (216 Cu. In. Engines, 1-1/4" S.A.E. Flange), Remove Old Flange Gasket. New Asbestos Flange Gasket No. 839632 1/8" thick must be used between Carburetor and Engine Manifold.
2.   For 1937-1952 Replacement (216 Cu. In. Engines, 1-1/4" Engine S.A.E. Flange), Install New Flange Gasket No. 839632 1/8" thick on top of old Heat Insulator. This insures proper operation of Vacuum Operated Power Systems.
CARBURETOR ADJUSTMENTS
Make adjustments in following order—
tmp196-1.jpg
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FIGURE 1
FLOAT LEVEL ADJUSTMENT
With air horn fully assembled, gasket in position and assembly up-ended on a flat surface (Figure 1);
1.   Place float level gauge in position with gauge tang inserted in discharge nozzle.
2.  Bend float arms vertically so that each float just touches top portion of gauge.
3.  Bend float arms horizontally so that each float is centered in gauge.
4.  Tilt assembly 90 degrees each side and check that
floats do not touch gauge.
FIGURE 2
FLOAT DROP ADJUSTMENT
As shown in Figure 2, to insure sufficient entry of fuel under high speed operation, it is necessary to check and adjust the float drop. With air horn held right side up and floats suspended freely, carefully bend the float tang at the rear of the float assembly so that the bottom of the float is 1-3/4" below the gasket surface. Install air horn assembly to float bowl and tighten screws evenly and securely.

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