Zitnik has a repair person that does O gauge and another that does HO and N gauge. The store is open Tuesday thru Saturday. Bring it to them. They do the repairs in house. I'm happy with the service but this time of year it might take a while
Zitnik Trains does have a repair service, but you'll probably have to bring your engine in for them to see what's wrong
Thanks! Your answer is awaiting moderation.