I have finished laying track on my switching layout. The locos seem to perform well, however, once in while as a loco goes through a turnout, a sizable spark will emanate next to the wheel...lights go out and I have to reset. After reapplying power I run the loco through the same turnout...no issues. I have seen Legacy and MTH locos exhibit this issue. I see scorch marks on the turnout where the spark occurs. Again very inconsistent. Sometime I can run the loco without issue for 5 minutes going through the four turnouts on the layout...then spark. Any ideas?
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