Modern two stroke oils are much better than the oils that were available when these engines were made, mixing to the ratio on the starter decal with modern oils will result in a very smoky exhaust, using too little oil will result in dry bearings & premature wear.
Using a 32:1 mix of good quality AIR cooled two stroke oil should be good, I have been using Stihl HP oil (for all my two stroke engines) which was recommended by someone I know that uses two stroke chainsaws regularly.
Both outboard oil & #30 SAE oil (the modern equivalent is NOT suitable due to the additives used) have been mentioned in instructions for these engines over the years.
David