Originally Posted by
LeoSV
I think you mean 3000' MSL. Just turn the mixture knob lean until you hear the engine begin to run rough, then turn back to the right 3 full turns. then you are at the correct mixture.
BINGO! There are many airports (mine included) that are way above 3,000' MSL, so we always lean...we even lean for taxi here and it makes a noticeable difference in how the engine runs just idling around. Not to mention the fact it keeps from fouling plugs as often.