I tried all fixes. None of them work reliably. There is a school of thought that running trains vibrate the 394 head and help it rotate. Didn't work for me either. I like the 394 because it doesn't have drive feet to wear out on the vibrator motor. I took a small 12 volt DC fan from an old computer. The fan looks like a small box and measures about an inch and a half square and half inch thick. I hung the fan on the handrails on a Marx light tower about 2 feet away from my 394 and angled it so the air flow spins the 394 head in one direction. The 394 is also elevated about 4 inches higher than the light tower. I powered the fan and the 394 tower off a separate DC wall power pack I had laying around. Works great! I have the 394 spinning anytime I enter the room without having to turn on the layout power. The noise from the tiny fan is about equal to that of a 494 vibrator motor. Later today I will post a photo or two of the set up.
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