While you wait for answers, we may have found some information which could help you.
Success
Message
Bobbin won't wind?
Singer 188K1 presser bar stuck?
Singer 507?
1965 Singer 275k sewing machine foot pedal?
Presser foot is loose?
My CG 500/550 Singer Sewing Machine's bobbin isn't working?
Engine revving up ?
Singer 201 went bang , smelt and now won’t work?
the thread is bunching on underside of fabric it looks like birdnest?
Need a service manual for a Singer Treadle Sewing Machine Model 66-1?
Singer zigzag 457 Stylist not threading bobbin/making stitch?
What size needles can I use for my Singer 39a3?