As you know most n gage engine manufacturers do not seem to reply to questions. Does anyone know who makes the electric motors for the n gage engine makers? The only reason I am considering pencil leads is that I seem to have no alternative.
Now, I really have not worked on any N before I got these. And when I got these more than half the locomotives wouldn't run at all. They had no signs of life.
All I did was clean the wheels real good and most of them took off and ran like rockets.
I cleaned what track I had on the small table too. A few I guess is an internal problem but I was amazed at what a little cleaning accomplished.
I am guessing yours are nice and clean? Both the track and wheels?
I do check the wheels and track. I give a new used engine a quick try. If it doesn't run, I put it on the workbench and connect a power supply directly to the motor at the brush contact points. If the motor does run then I go back looking for the weak electrical connection and fix it. If the moor doesn't run I check to see if it turns freely. If it does the brushes become suspect.