I have inheirited an old outboard with red script lettering on the gas tank that says "ELTO" or "ECTO" and on the flywheel it says Outboard Motors Corp. Milwaukee Wis. Made in USA. The serial number is 6240749. I believe my father bought it second hand in the late 30's or early 40's. It is a two cylinder, rope start version, steel cylinders, aluminum housing, stainless exhaust. Am interested in possible restoration, although it sat outside, unprotected for about 20 years, I believe it would be possible. Can you advise year of manufacture, availability of manuals/parts? Thank you.<br />Mark