If they dont have it right here on iboats try NAPA auto parts. The number is 18-3001 fits 54-<br />64 E/J motors.Bring your old one to compare.<br /> Your motor shares many parts with similar E/J motors.
Dan --<br /><br />looking up some other model numbers today, and yours indicates you have a 1960 5 hp model. That would be an OMC made by the Gale division. The impeller part number is 277181.