Question:

Singer 648 Sewing Machine Questions

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  1. sticthes do not lock


  2. Help the bobbin is bunching up.

  3. I am having trouble with the bobbin thread bunching up.  I just had this machine services and all of the plastic grears replaced.  What would make it bunch up like that?  It was sewing beautifully and I took the material out and put another side of my project in to sew and it started doing that.

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