It's easy to reinstall the pull off on wrong. Not that I've ever done that.
If working correctly, bumping the throttle once should be enough to allow the choke to pull close. Adjust the choke till this happens.
Also, my fast idle screw has been known to vibrate out of adjustment from time to time. Check that as well.
"Work hard, rock hard, eat hard, sleep hard, grow big, wear glasses if you need 'em."