Note: Picture to be used for reference only. Carburetor models may vary.

Note: Please read all the WARNINGS below. 

NOTE: Stromberg pump check valves can only be replaced with the carburetor removed from the intake manifold. However, if you are experienced with Stromberg service and repair, and want to keep a multi-carb linkage in place, an alternative is to remove just the carburetor bowl and airhorn, leaving the base casting in place on the manifold. Always make sure there is no fuel remaining in the carburetor fuel bowl.


a) Using the wide blade screwdriver, remove the center bowl plug (43) and its gasket (44) from beneath the float bowl. Now switch to the narrow blade screwdriver and remove the old accelerator pump check valve, located behind that center plug.

b) Make a visual check, as best you can, on the condition of the pump check valve’s threaded hole and mating surface in the casting. The valve doesn’t use a gasket so relies on a good seat in the casting. If you have a problem, you’ll need to fix it before continuing. If it all looks OK, simply install the new pump check valve. At Stromberg, we use a small electricians screwdriver with a split blade clamp that holds the valve on the end of the screwdriver while we line it up in the hole. Once in place, we tighten it in with the normal screwdriver. DO NOT OVERTIGHTEN the valve in the casting

c) Now fit a new ring gasket (44) to the center bowl plug (43) and install it back into the casting. Take care to avoid cross- threading the plug into the casting. Packs of 10 new bowl plug gaskets are available from your Genuine Stromberg dealer. Ask for kit 9563K.

You’re done! If you think we’ve missed anything or we could improve on this Genuine Stromberg ‘How To’, please let us know. Email –