Originally Posted by
Onebyone
Long shot but it worked for me. If you use a plastic bobbin, replace it with a metal bobbin. Nothing I did stopped all of a sudden skipped stitches on my Brother 420. A late night internet search found a machine tech that said use a metal bobbin not the plastic one. I changed to a metal one and no more skipped stitches no matter what thread or needle size I use now.
I didn't know you could use a metal bobbin on a brother machine! I have only seen plastic! I have several metal ones for my vintage machines... If I can find one the same size I will try! Thanks!