Originally Posted by
ho2zoo
I haven't had any problem running my 2-stroke OS .91 on 15%. Very reliable. And the .91 and 1.20 4-strokes run on 15% too. Just that big Super Tiger that needs 5%. But whatever they need to run well I guess.
Finally, a real world related response.
dont get me wrong, there's been REALLY helpful responses here, its just that someone else with a .91 OS running 15% can offer some really helpful empathy.
what prop are you using? Are you running really rich? Are you shimming the cylinder head, or are you, like me, running 15%, no special tricks? Just trying to compare what you're using and experiencing to get an idea of different things I can try...