pretty much every outboard that isnt oil injected is usually 100:1 I am gonna break my motor in at about 32:1 and after that prob 40:1 lean mixtures work best with propper jetting is what I say. never in my 15 yr riding career have I had an issue with lubrication. 50:1 in every 2 smoke i've owned. BTW I like this site so far seems like everyone i've met is cool no spodes here it seems lol..