Some of the Carter B&B 1 barrel downdraft and some Stromberg BXV, BXVD & BXVES have a dashpot built into the carburetor. This dashpot resides on the inside on the opposite side of the accelerator pump and is often mistaken as another accelerator pump because it looks like one.
The dashpot is used on some vehicles with automatic transmissions. When letting up on the accelerator the dashpot will keep the throttle valve from completely closing long enough for the extra fuel to get burned in the engine.
The complete dashpot is not manufactured, except for this one. This dashpot only fits certain carburetor numbers.
Our kits for these carburetors do include a repair kit to replace the leather cup. Instructions are as follows.