SPRING - FORWARD CLUTCH - VARIOUS SUPER BRONCO, BRONCO, ECONO & TUFFY TILLERS REPLACES PART NUMBERS: 1916712, 1716712, 732-04185 FITS MODELS: 21A-630C766, 21A-634A766, 21A-634K711, 21A-634K766, 21A-640C711, 21A-640C766, 21A-643B011, 21A643B066, 21A-643B711, 21A-643B766, 12180, 12190, 12191, 12193, 12193, 12208, 12210, 12210, 12213, 12214