zenith r20 Tech

The Zenith model R20 was a series of small updraft, cast iron body carburetors built in the 1930s and 1940s. There are two main versions which can be distinguished by the number of screws holding the two halves of the carburetor together, either the 3 or 4 screw type. The two versions use different carburetor kits.

 

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How to find Zenith carburetor numbers