Wreader,
If you did replace the scree in the carby and not just the one in the tank.

Here is some information on the setup:
Setting up your 2-cycle Tillotson Carburetor.Before mounting your Tillotson carburetor check the pulse track from the carb mounting surface and make sure that this track through the carb adapter , gaskets and etc is clear and in line with each other.
Set the low
(Closest one to the cylinder) speed needle at
1+1/2 turns out and the high speed needle at
1+1/8 turns out. 
Hope that this will be of some help.
I will be loading up some information regarding carby setup procedures in the future into parts list and manuals area.
