My 9 year old son and I (both novices but engineers) acquired a "53 or '54 Super Fastwin 15 HP evinrude (15012-27852) purely to learn what makes them work. I would like to tear down the entire engine and explain main components. It would add to the enjoyment if we could put back together and make it run. Currently in some pieces and hasn't run for years (manual is on the way for '53). Any suggestion to improve our chances of seeing it run again (I don't want to permanently damage anything that can't be replaced).