Have a new 01 426 and am using stock jetting here a Colorado Springs (~6000', 75deg). Have been getting decel popping (sometimes) and studder/hesitation from 0-1/4 turn of the throttle (often, usually after a jump and coming back on the gas). I assumed it would be running rich due to the sea level jetting. Pulled the plug and found black threads and white electrode (lean). A little puzzling. Stock main, stock clip position (4) and stock pilot. Almost stock 1.5 turns out on the fuel screw. I see jetting suggestions all over this site but not always clear on the users altitude (not attitude) and temperature (not temper). O' wise ones, will I be in the ball park with just turning out the fuel screw another 1/2 turn? If I'm lean at 6000', it would seem sea level jetting is way off base.