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the thread is bunching on underside of fabric it looks like birdnest?
Singer 507?
Singer zigzag 457 Stylist not threading bobbin/making stitch?
how to get the tension right on my machine?
Presser foot is loose?
Bobbin won't wind?
Need a service manual for a Singer Treadle Sewing Machine Model 66-1?
My CG 500/550 Singer Sewing Machine's bobbin isn't working?
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Engine revving up ?