You say you can touch the nozzle with your finger at 185C? If so, your temp is obviously not 185 - more like 50C!
Also setting the temp lower than spec and having it extrude doesn't make sense either.
Have you got the correct thermistor set in Sprinter?
Have you checked the thermistor resistance when its cold?
Does the resistance drop when you warm it?
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Waitaki 3D Printer