Hmmm, I've worked on sewing machines for 20 some years, on and off. I rewired a 201 I found on ebay last weekend. I'm very familiar with Featherweights, having owned 3 of them, including a 222. A brand new belt sitting unused on a machine for a mere 3 months shouldn't have a permanent kink in it. It sounds to me like the guy cranked the tension too tight on the belt. If you move the motor out too far, in the process of putting tension on the belt, you will get a 'kink' on it.
Try this: Loosen the motor enough so you can get the belt off the small pulley (don't take the belt completely off the machine, leave it in place around the flywheel). Turn the belt so you can reach the kink. Then 'un-kink' that bump by bending it sharply in the opposite direction. You might need to hold it in place a few seconds. This 'should' fix it. But if it doesn't, you should return it and ask for a new one. The guy definitely put it on too tight.
Last edited by Christine-; 08-11-2012 at 09:55 AM.