[AL in NY]

Folks, you can't properly rebuild a "B" carburetor without removing the passage plugs and cleaning the hidden passages. The one of the biggest concerns is the passage under the GAV nettle where rust accumulates. The other buried passage is in the idle circuit. When I rebuild "B" carburetors, I drill out the passage plugs, clean out the passages and replace the plugs with set screws sealed with Loctite 592 thread sealer. This sealer remains pliable and is unaffected by gasoline and ethanol.