While you wait for answers, we may have found some information which could help you.
Success
Message
Singer 507?
Singer sewing machine 626 kno?
Presser foot is loose?
Singer zigzag 457 Stylist not threading bobbin/making stitch?
the thread is bunching on underside of fabric it looks like birdnest?
My CG 500/550 Singer Sewing Machine's bobbin isn't working?
Singer 201 went bang , smelt and now won’t work?
Bobbin won't wind?
Engine revving up ?
1965 Singer 275k sewing machine foot pedal?
What size needles can I use for my Singer 39a3?
Singer 188K1 presser bar stuck?