Does anybody have any info on the wiring and testing of the Rowa 2-8-8-2 smoking units for n gauge I have a couple of these units and want to find out why the smoke units won't work and how to test them and replace parts if available. Thanks in advance.
Your Röwa Y6b was manufactured in the mid 1970´s by the long defunct Röwa Co. in Germany. The smoke generator in it was supplied by Seuthe in Germany, who do not stock spare parts for it anymore.
I am afraid you will have to live with that smoke unit being out of order.