I have a Lionel Atlantic #103 engine that after running for ten to fifteen minutes begins to go slower, increasing the transformer voltage does not increase the speed. The engine gets very hot as well.
I am using a KW transformer, have cleaned the track and checked the voltage to the track also and it is ok, not the transformer losing power.
This engine is a favorite with the grandchildern and smokes really well.
The motor has just been replaced.
What could the problem be?