There’s something about speed step 23. This sounds ridiculous, but on my scale Lionel B&O F3 the engine would run fine for several minutes at step 23 and all of a sudden it would stop. When I backed off to step 22 it started moving normally. Mike from Lionel said to just replace the main board but at $100.00 I decided it’s cheaper to just bypass step 23 and go right to step 24 or 22. After several months running like this I was cleaning the wheels and noticed one of the rollers had a small bind to it. I oiled both the rollers and has now been running at step 23 for several years perfectly. I just have no explanation for this other than electronics and AC trains can have unexplained gremlins hiding within.
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