I come here to the experts to see if I can get some help. I have an American Flyer Y3 that has problems when the smoke is turned on. Smoke off all is well, sound works lights all work and it runs like a champ. When the smoke is turned on it will not run with the shell on. I removed the shell and with smoke on I turn the throttle the drivers will turn about one third of a revolution in forward, when I turn the throttle again it will repeat about one third revolution. When I reverse the engine it will only move a fraction, maybe 1/8 of a revolution when I turn the throttle again it will go forward 1/3 revolution of the drivers. The number is 6-48197 Any help here is very much appreciated. I have looked a little farther and I see the motor for the smoke unit is not spinning, could that be the problem.