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