If the wick doesn't seem absorbent or the smoke stinks, the cause is usually a burnt wick. It will need replacement. If you suspect you may have overfilled the smoke unit, check the bottom of the engine. The presence of smoke fluid is a sure sign of overdoing it (exception: I have one engine, a Lionel Mogul, that just plain leaks, even though it smokes well. I turn it over every couple of times I run it to clean it up).
Arnold, yes, you have created another great thread!
John
