Replacement motor with small pinion installed.  First, make sure the motor is defective!  This 9-12 VDC motor will fit all super feeders.  HOWEVER, the plastic tab holding  the existing motor on its backside will need to be broken or twisted back to pull the existing motor out of its position.  The new replacement motor will need to be glued in its original place.  Also, soldering of two wires from the electronics board to the motor will be required.  You may also consider purchasing a complete floor with electronics board and gearbox if not sure what the problem is or sending the feeder to us for repair.  Troubleshooting page