Re: S9 tension issue

Jim Stutsman

Overly tight bobbin tension can cause the symptom you describe, but it's more likely to be insufficient top tension. Fold a piece of fabric in half (denim is good for this) and slide it in the rightmost slot at the top. Work it back and forth like dental floss. This will dislodge anything that may be caught in there. If that has no effect I would suggest having the machine looked at by a technician. It is VERY rare for a machine to come out of the factory with bad bobbin case tension. Trying to fix that will just about always make things worse.

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