Wont start off in 4th or 5th gear without the choke out. Once moving choke can be pushed in and it will continue just fine, until it starts to die. This is with no load, just the bare tractor. Main jet screw on the bottom, front of the carb (towards governor) is set 5 turns out currently, although I usually only set them about 3 turns for better economy as mine are not hard workers.
Have the carb off now and will clean again and hope for better results. Thanks!