Stromberg BXVD Adjustment

Float Adjustment – BXV-3 & BXVD-3

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Install the floats with the fulcrum and pin retainer in the main body, then install the needle seat and gasket in the body and tighten securely. Invert the main body so that the free weight of the floats alone is resting against seated needle. The distance from the top of the main body without gasket to the top center of each float should be as specified below. Use a metal ruler to check the float level. Adjust by bending the float hanger arm. When adjusting the float do not apply pressure against the needle. The tip can easily be damaged and you will get a false reading.

Float level measurement: 1/8″ below casting w/o gasket.

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Idle Mixture Adjustment

Turn screw in until gently seated, then turn back out 1 turn. Turn in for a richer mixture. Once the carburetor is on the engine, bring to operating temperature, adjust the idle to specs, then adjust the needle for the smoothest idle.

Fast Idle Cam

Hot Air Type

Stromgberg  BXOV & BXVD Fast Idle

Note: Before proceeding with Fast Idle Cam Set

ting, adjust throttle stop screw so screw just contacts low step of cam when throttle valve is fully closed.
To set Fast Idle Cam, apply light closing pressure against choke valve when throttle stop screw is rest­ing on step of cam shown. Insert gauge “A”* between choke valve and wall of air horn. If clearance is not as specified, bend rod as required.

Electric Type

Carter BXOV BXVD Fast Idle

Note: Before proceeding with Fast Idle Cam Set­ting, adjust throttle stop screw so screw ju1t contacts low step of cam when throttle valve ie fully closed.
To set Fast Idle Cam, apply light closing pressure against choke valve when throttle stop screw is resting on step of cam as shown.
Insert gauge “A”* between choke valve and wall of air horn. If clearance is not as specified, bend rod as required.

Wide Open Kick Adjustment

Step Type Fast Idle Cam

Stromberg Wide Open Kick Adjustment

Note: Fast Idle Cam Setting must he made before making Wide Open Kick Setting.
With throttle valve held in ·wide open position, insert gauge “C”* between choke valve and wall of air horn. If clearance is not as specified bend ear on throttle lever as required.

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Non Step Fast Idle Cam

Stromberg BXOV Non Step Adjustment

Note: On carburetors with hot air type choke control and non-step fast idle cam, the Wide Open Kick Setting automatically sets the fast idle.
With throttle valve in wide open position and cam pin in contact with cam, apply light closing pressure against choke valve. Choke valve should be open just enough to insert gauge “C”* between choke valve and wall of air horn. If clearance is not as specified bend fast idle rod as required.

Updated on 08/30/2021

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