While you wait for answers, we may have found some information which could help you.
Click here for Sewing Machine Repair Singer
Bobbin won't wind?
1965 Singer 275k sewing machine foot pedal?
Singer 201 went bang , smelt and now won’t work?
Singer 188K1 presser bar stuck?
Singer zigzag 457 Stylist not threading bobbin/making stitch?
My CG 500/550 Singer Sewing Machine's bobbin isn't working?