Are you aware of any kind of commercial device that can prevent Lionel and MTH trains from running in reverse? Whenever any of my young grandchildren try to run a freight train in reverse, the cars inevitably derail and ruin our fun.
This is an interesting problem to have! I can’t think of any device capable of locking a locomotive into running in a particular direction. However, most engines from Lionel and MTH can be locked into a direction via a switch on the locomotive.
If you consult the manufacturer’s instructions for your specific O gauge locomotive, you should find a section that explains how to lock it into forward, neutral, or reverse. This feature is typically referred to as a reversing switch.
Flipping the reversing switch will lock the locomotive into a direction, regardless of how many times you cycle the power on and off. See what happens when you do this and then let us know if this simple fix can keep the fun going!
