Originally Posted by GrandmK

I have a white sewing machine. Nothing fancy. It has started not sewing. I mean I sew and everything goes along good. I finish a seam and look at it and it looks good top and bottem and then I realize it pulls right out. A little tug on either top or bottom thread and it all comes out. I have re threaded a SILLION times. it is right. I took out bobbin case and holder and oiled it. I changed stitches NOTHING helps. WHAT could be wrong. Is something broken?? What could be wrong.
I honestly thought I had somehow lost part of the bobbin case holder but that is not the case and it is back in right. The stitches look right and I have not changed the tension. they LOOK good.