Depending on the age of the machine, it might be fixable. I would oil it well, and see if that helps. It might just be sticking because the old oil has dried up and gummed up the machine. When you turn the hand wheel, does the needle go up and down? The stop on the hand wheel might be on backwards. If you haven't taken it off, then that is not the problem. (That's the metal part that you unscrew to wind a bobbin.) I think about the mid 1960's, they started using plastic parts which would be dying about now. I have a Touch and Sew from the early 70's that still works, but it's been lightly used and always stored in the air conditioning. If you have a sewing machine repair shop, they should be able to repair it. I'm in Dallas, and I go to Mr. Sewing Machine on Harry Hines. They are a Baby Lock dealer, but repair all brands of machines. Just call around and see who will work on it. There are a couple of internet sites you might be able to get help. One is victoriansweatshop.com and the other is quiltingboard.com (vintage machine section). Both of these sites are generally good for finding info on older machines, but your machine might not be old enough to get help there. I don't do Facebook, but they should have some groups that might be able to help you. Look for Singer groups. Also, groups.io has some Singer sewing machine groups. Sorry I couldn't help more. All of my sewing machines are older than yours and I'm just not familiar with it at all. I'll check back and see if any of this was any help. bkay

Try playing with the tension.....upper and lower and see if it helps..try different stitch sizes...does it look like the cone thread has burrs on it? Did you try a different cone? That is what I would start trying...I've used cone on my Featherweight using a cone stand and it worked for me. Good luck

You adjusted something by mistake when you had it apart. Did you lower the feed dogs? Look at the needle plate are the teeth sticking up past the plate or level with it. The material won't feed through if the feed dogs are down. Look in your manual. It should have how to lower and raise the feed dogs. Whoops I reread your post again and they are up--well I don't know what to say As for the tension--could you have disconnected the pressure foot rod from the tension somehow. I don't think this is a home repair. I have had machines apart and I simply don't know. I really don't think it would be that much to take it in and have it repaired. If it worked fine before, it is just a matter of connecting things right. Could you borrow or rent a machine to finish your dress?

There is no bobbin to this little machine. It makes a chain stitch. In order to do this there is a lever underneath the catches the thread. The way it is designed the lever hits the needle and eventually over time the needle form a permanent bend. This will prevent it from catching the thread. What you need to do at this point is to replace the needle. The 24x3 is no longer manufactured. You can order a 24 x1 which is the replacement the size 11 works best. Remember that the flat part of the substitute is on the opposite side from the original 24 x3.