Sam,
Thanks. I run TCW-3 outboard oil at a 16:1 mix, and it ran just fine. It is a water cooled leg, but as this is my first ever air cooled outboard, how hot should the P/H run? I was getting temps between 190-220 degrees at WOT. I was wrong, as under all of the dust, turns out its a blue-green color.
1952 Blue Streak "B-Stock Runabout" - 1952 Mercury KG7Q
1955 Feather Craft Vagabond - 1956 Mercury Mark 55E