Reply to "Replacing Hogwart's Locomotive motor with large motor"

There are some small Pittman motors with rare earth magnets which would probably fit, and improve the performance of this loco.  The real challenge would be removing the worm gear from the original motor, and installing it onto the shaft of the new one.  That's one of the things I don't like about Lionel's "traditional" locos.  Some (but not all) of the RailKing steamers use a separable worm gear linked to the motor by a dogbone shaft, a better design that lends itself to upgrades.