FWIW, I find that some of the motors that are in Williams stuff seem to run a bit hotter than Lionel or MTH. Not absurdly hot, but they seem to draw more current with no load at a specific voltage than the other brands. Most of the motors that I'm seeing with this characteristic have no model nomenclature, so I have no idea what brand or model they are. The ones I am comparing them to are usually Mabuchi motors.
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