Originally Posted by UNGN
The difference between the motors is the wire length. The PKZUM1016 has short leads, the PKZ3616 has mid length wires. The EFL9052 has the longest wires (and is usually the cheapest).
The above motor mounts are the same. The difference is the PKZUM1027 has a clear "champ style" nut, while the PKZ3527 has a white, hard plastic nut on the back of the shaft.
Do you know of any differences in the gearing, or do both gearboxes run the same spurs?