ROCHESTER CARBURETORS

Bulletin 9C-327 15 January 1958

BULLETIN 9C-327
PAGE 4 OF 5
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Disconnect rear end of throttle actuating rod which connects the throttle levers on the front and rear, carburetors together. With both the throttle valves closed on the front and rear car­buretors the rod should center in the slot in the throttle lever on the rear carburetor. Bend the throttle rod with Bending Tool BT-18 to adjust. Connect throttle rod after adjustment
SETTING .360", GAUGE BT-108
With the throttle valves held wide open the choke valve should be open just enough to admit the large end of gauge between the upper edge of the choke valve and inner air horn wall. Bend the tang on the throttle lever with Bending Tool BT-69 as shown to adjust.
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SETTING .030", USE FEELER GAUGE This adjustment is necessary to locate the lockout lever on the front carburetor in the proper position so that only the center carburetor will operate during choke operation. This adjustment must be made with the carburetor installed on the engine and the lockout linkage installed as shown.
To adjust hold the choke valve (center carburetor) in the wide open position. With the throttle valves slightly open on the front carburetor there should be a clearance of .030" be­tween the lockout lever and the throttle lever on the front carburetor as shown. Measure clearance with a feeler gauge and bend the lockout rod with Bending Tool BT-18 to adjust,
With the throttle valves closed and the arm on the vacuum diaphragm in the fully extended position, bend the vacuum unit actuating link — if necessary so that it fits freely into the hole in the throttle lever.
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SPECIAL TOOLS SHOWN IN THESE PICTURES
ARE AVAILABLE THROUGH UNITED MOTORS SERVICE DISTRIBUTORS
SETTING .015", USE FEELER GAUGE
This adjustment is necessary to maintain the proper clearance between the contour portion of the lockout lever and the lockout tang on the throttle lever.
To adjust hold the throttle valves (front carburetor) com­pletely closed. With the choke valve on the center carburetor in the closed position and the choke lockout lever rod connected, bend the lockout tang on the throttle lever (front carburetor) to obtain .015" clearance between the lockout lever and tang on the throttle lever as shown.
PRINTED IN U.S.A.
Form No. 1255

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