OK! Have got carby so engine runs without foot on pedal all the time.
Still running rough at idle.
The screws in photo (not my carb) are
#1 Idle mixture
#2 Idle speed
#3 Fast Idle Screw
#4 A/C Throttle up screw - this never contacts anything to make an adjustment
Can someone explain the sequence of adjustments needed to all these to get the carby running sweetly?