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I recently purchased a Lionel GN F3-A #366-A that appears to be from the 1992 run. I purchased the unit on EBay. It was described as “Runs great, Light, Horn, works”. Well there were a few things off on this description when I received the actual unit.

1. The unit did not “Run Great”, it was very jerky at slower speeds. I checked the power trucks and noticed that the wheels on the rear power truck were binding. Disassembly of the truck revealed a partially stripped nylon worm gear as the issue.

2.The Horn, as subsequnt research revealed, obviously did not work as the powered A units did not have a Horn installed. The Horn and railsounds for the set were in an unpowered A unit.

I could return the unit for a refund but wonder if it is worth pursuing a partial refund and tackling the repair myself?

So my questions I have about the unit is how reliable are these units normally? I can find both replacement brass and nylon worm gears online and the repair looks to be pretty simple. Is it worth it to repair it and if so, which gear would be better to use, the nylon ones or the brass ones? The Horn, obviously, is a lost cause :-)

thanks,

Kevin

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Mine does not have much run time but it does operate smoothly and I have not had to repair it yet. Did you get only the lead A unit? These were offered in an A-B-A set, with a two-motored lead A unit, RailSounds (1) trailing A unit and unpowered B unit. A separate sale add-on unpowered B was also available and I see these frequently on eBay.  A 5906 horn/bell controller came with the ABA set to operate the bell.  I ran mine with the sound F3A unit leading and the powered unit pushing.  It sounded good for its time... 

My advice, if the repair is easy, is to replace the worm gears in BOTH powered trucks with a brass one. Then it should be a good runner like the postwar F3's.  Good luck!

You should try and find the cause of the stripped gear in the rear power truck. It shouldn't just strip. If nothing jammed the gears check the armature for excessive thrust (up and down movement). That can chew up a worm gear.

I have a set of F3s from the same era (18117 Santa Fe freight scheme from 1993). The gears on it are like new, even after heavy use over the years. The plastic gears are fine as long as everything is kept lubed.

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