Hi K. I'll vote for virtually any OMC model from the mid 50's through the mid 70's. You can literally fix anything on them with a flathead screwdriver and a 7/16 wrench. No electronics to go on the fritz, or become obsolete either. Just good 'ol fashioned mechanical power. Best of all, parts are still readily available and pretty dang cheap. QUOTE]
OMC started using Electronic ignition in the mid 60s. Obsolescence was a yearly thing on those Ignition systems. As for parts easy and cheap to find... you obviously haven't tried getting parts for the electric and hydro-electric gearcases