It has the screw in power pack. I had fire on three of the four. Tested stator and it had 250+ DVA. Tested trigger 1.5-2.0. Changed out the power pack with one I thought was good. No spark at all. Put the old pack on and no spark at all. I did notice the rectifier red wire was frayed to the point it was in half and may have been grounded. Disconnected the kill switch and tried it with the big red plug unplugged. Any ideas?