This actually happened a couple of weeks back, finally getting around to writing about it. The NewOne B&O "Teakettle" 0-4-0T has been remotored, but not with an original. I received a box of motors, and one in particular, a Rivarossi vertical motor, I suspect from their original Indiana Harbor Belt 0-8-0.
The brass mounting strip, which is soldered to the end bell of the motor, was almost a perfect fit, needing just a screw hole refiled and the whole strip itself slightly reshaped. Another concern was the worm gear pitch, but it works well enough, if a bit loud (contrast that to the NewOne Camelback, whose motor assembly purrs).
The shell had to be slightly reworked, as the motor sits slightly more forward than the original rectangular NewOne motor. To accomplish this, I ground down a portion of the interior just at the joint between the cab and boiler. For now, this is being left open, as it really isn't too obvious. Also, I filed off the rest of the broken pilot and replaced it with a diecast one that was almost the right size, though I had to adjust it a couple of times, as it was shorting out.
While it is still a bit loud, it runs, and rather well at that. Next, we need to do some painting and couplers, and this model should be ready to go.
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