We may have found other answers which could help you.
Success
Message
how to get the tension right on my machine?
Singer 507?
1965 Singer 275k sewing machine foot pedal?
My CG 500/550 Singer Sewing Machine's bobbin isn't working?
Presser foot is loose?
What size needles can I use for my Singer 39a3?
Need a service manual for a Singer Treadle Sewing Machine Model 66-1?
Bobbin won't wind?
Singer 201 went bang , smelt and now won’t work?
Engine revving up ?
Singer zigzag 457 Stylist not threading bobbin/making stitch?
the thread is bunching on underside of fabric it looks like birdnest?