Try a new needle in your machine, and rethread, then have a long enough tail on your thread on top and bottom thread, Also, make sure that you are threaded right, by that I mean that when you pull your top thread with the presser foot up, it feeds smoothly, then you know that the tension discs when you are on the way down are giving the right tension. Now put the presser foot down, and the thread should hardly move. Now thread your bobbin, make sure that it is feeding the correct way, pull on the thread and see that it is unwinding correctly.
If, you need a manual, go to
www.singerco.com and download it for free. Look at the threading diagram, make it larger if necessary. Good luck. I hope that this helps you. .
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