I have a Singer Stylist 533 and my thread keeps breaking.
By Erica Z
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Have you adjusted your tension? That is what I do first.
See my reply to your other question on this machine - this new problem is not likely related to your feed dog issue but is probably your bobbin gear, but all else in the other answer remains the same - your machine has plastic and silicone parts that have failed with age. And this second question now has me, a sewing teacher and vintage Singer repair tech here in the UK, now strongly urging you to splash out on a modern, under-warranty sewing machine.
I also posted a link to a SingerCo free download of your manual there but will post it again here for you:
www.singerco.com/
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