The Elto Ace was developed from the 1934 1.5 horse Evinrude Sportsman. It was rated at 1.4 horse power in part to justify the lower price. Later models used an improved gear case which did away with the piston type water pump in favor of a two stage centripetal type. So the gear case parts are backward compatible while fuel tanks are forward compatible. I could not find a list for Elto production, but it probably was as non-informative as Evinrude’s list. . . 😆
