The Carter AFB dashpot is a device used in carburetors to control the rate at which the throttle plate closes. It helps prevent stalling and provides smoother engine performance.
A dashpot is essentially a piston and cylinder assembly that is connected to the throttle linkage. When the throttle plate is opened, the dashpot piston is forced down into the cylinder, compressing the air or hydraulic fluid inside. As the throttle plate is released, the compressed air or fluid slows down the closing of the throttle plate, preventing it from slamming shut and causing a sudden decrease in engine speed.
This gradual closing of the throttle plate provided by the dashpot helps to maintain a steady engine speed and prevent stalling, especially during deceleration or sudden throttle release. It also improves the overall drivability and performance of the engine by reducing any jerky or abrupt changes in throttle response.
With primary throttle valves in wide open position there should be the distance as listed on the carb spec page between the top surface of the bowl cover and the top of the plunger shaft. To adjust, bend lug.