Tecumseh Series 11 Carburetors Identification

This carburetor adds a fuel chamber, built into the carburetor body, that feeds fuel into the venturi during the initial warm up period. This patented feature eliminates, hunting, surging and false starts inherent to emissions engines. However external identification of the Series “11” carburetor has been a challenge. To make this ID simple, the Series “11” carburetor idle restrictor cap will be black, and all others will be gray. The part number for the black cap is 640200 and the gray is 640053.