George Mason posted:Mine is the 20-20465-2 chrome plated edition.
Are you stating that you bought the 2 rail version without tires?
not this I hope
https://mthtrains.com/20-20465-1
Are you pulling up inclines?
My 2 rail F units don't pull much singled out. When you double or triple them together, the pulling power seems to jump up exponentially.
I would not expect a single F unit to pull a big train up any type of inclines. Perhaps lighted cars are causing too much drag as well? Check for free rolling trucks. Lubricate the dummies axles too.