RickO posted:I'll third that it sounds like the flywheel is rubbing something under the shell, maybe even the shell itself.
IMO its not quite "harsh" enough to be gear chatter. I'd think with that much noise from gears there would be some noticable slowing or lurching as the speed control tries to compensate.
I had a Lionmaster steamer that lost a motormount screw. The motor would rise up out of the chassis creating a very similar rubbing sound to what you have.
Yeah, it appears to run very well. Loose motor-mount or truck-mount screws can do this - open it up and check those flywheels.
Does it do this in both directions? Lose motor/truck situations can cause binding/noise in one direction, but not the other, owing to the pitch of the worm turning the spur gear and motor shaft direction.
