TN 393921 Distributor Rotor for Tennant Sweepers and Scrubbers. Fits GM Gasoline / LPG 4-cylinder engines in some models (please check your serial number before ordering). Fits Tennant 550, 1550, 800, 810 and 8410 models. Priced Each. Replaces Tennant 393921. Our Part Number TN 393921