clogging after 4th layer

[waltermixxx]

I have a Makerbot 2X and after leveling the bed for the 4th time it will still clog after layer #4
running stock printer with abs extruder temp 230° printing ABS.
As you can see by the pic the the top surface is rough like the nozzle was dragging hard on the surface.
does anyone have a suggestion othet than making a boat ancor out of the printer.

I posted in the google group makerbot users a very similar issue.
I just repaced my Nozzle and the problem went away.