This 100% weedless prop is designed to push weeds away and conserve battery power. Even at slow speeds, it powers through heavy vegetation or cover. Fits 3-1/4″ motor diameters. Includes prop nut, pin and washer. 1865003 – MKP-6: motor models w/ Serial No. Prefix “MKJ” through “MKAI” or”J” thru “V”: All Terrain 30, 33, 36, 40, 42, 44; Edge 40, 45; Endura 30, 34, 36, 38, 40; Endura Pro 32, 38; Maxxum Transom 30, 33, 36, 40; PowerDrive 36, 40; PowerDrive V2 40, 42, 45; Traxxis 40, 45; PowerMax 36; 35Ta; 40Ta; 50Ta; 50MXTa; 65Ta; 555T; 565Ta; 665MXTa; 765MXTa; 865MXTa; 36PD/AP/C; RT27/S; RT40/S