NOS Carter Carburetor W-1 420s 1939 1940 Chevrolet
1939 Chevrolet – picture 420s
Two new carburetors were introduced in 1939. The 420s (Chevrolet 838938) was used on the Master, and 434s (Chevrolet 838990) was used on the Fleet vehicles. These carburetors differ from the 1938 versions primarily in the design of the throttle shaft. The 420s has only 2 bends on the throttle arm rather than three. The 434s still has three bends, but they differ from the 1938 Fleet unit. Bottom stamps (if still present): 420s – 365; 434s – 373.
1940 Chevrolet
Both of the 1939 carburetors (420s Master, and 434s Fleet) were held over for the 1940 model year.
