ROCHESTER CARBURETORS

Bulletin 9C-308 15 February 1957

tmp697-1.jpg
Rochester Carburetors
MODEL B MANUAL CHOKE
1954-57 CHEVROLET TRUCK "6"
261 CU. IN. ENGINE
BULLETIN 9C-308
PAGE 3 OF 4 DATE: 2-15-57
ADJUSTMENTS AND SPECIFICATIONS
tmp697-2.jpg
FLOAT LEVEL ADJUSTMENT
SETTING — 1-9/32", GAUGE M-250
With air horn fully assembled, air horn gasket in position and assembly inverted (Figure 1) :
1.  Place float level gauge, M-250, in position as shown, with gauge projection inserted in dis­charge nozzle.
2.  Carefully bend float lip vertically so that each float just touches top portion of gauge. If one float is higher than the other, slightly bend the float arms to bring them into alignment.
3.  To prevent sides of floats from rubbing inside of bowl bend float arms horizontally so that each float is centered in the gauge.
4.  Tilt assembly 90° each side and check that floats do not touch gauge.
tmp697-3.jpg
FLOAT DROP ADJUSTMENT
SETTING — 1-3/4", GAUGE BT-93 OR SCALE
To insure sufficient entry of fuel into the bowl under high speed operation it is necessary to check and adjust the float drop as shown in Figure 2. With the air horn held upright and the floats suspended freely, carefully bend the drop tang at the rear of the float assembly so that the bottom of the float is 1-3/4" below the air horn gasket surface. Use float drop setting gauge BT-93. Install air horn assembly to bowl and tighten cover screws evenly and securely.
CO, WD, 131, 149, 9X, 9FR
FORM 1235 I.P.S. PRINTED IN U.S.A.

< PREVIOUS PAGE      NEXT PAGE>

 

RC INDEX

 

INFORMATION FOR 1960 and Earlier CHEVROLETS

 

WebCounter says that you are visitor number:

Please Report any Broken Links or Pages that do not load properly.  Webmaster

This Information is for Research and the Promotion of the Preservation of Older Chevys

All Names, Trademarks and Logos Belong to their Respective Owners.

 

Web Space Provided by TOCMP