well, guys. you won't believe this one. I removed the cap from the pilot/mixture screw. is was already at exactly 2.25 turns out. i ran it to 2.5 turns... i figured it might be a tad rich, but we'll see. even with a drained carb. primed up. fired and idled cold with no choke. currently 73f outside. not bad. we'll see where it goes from here.