How often you replace with the extruder Kit for your 3D Printer?
What is the “extruder Kit” for you? The nozzle or the stepper motor with the small gear?
The nozzle could be clogged and you can find many tutorial to unclog it.
I mean this item:http://www.icstation.com/head-05mm-extruder-long-distance-filament-p-6245.html. Thanks!
You probably never have to change this, only the nozzle can be clogged :
Thank you for your help.