We may have found other answers which could help you.
Click here for Timing Sewing Replacedhow to get the tension right on my machine?
1965 Singer 275k sewing machine foot pedal?
Engine revving up ?
Need a service manual for a Singer Treadle Sewing Machine Model 66-1?
Singer zigzag 457 Stylist not threading bobbin/making stitch?
My CG 500/550 Singer Sewing Machine's bobbin isn't working?