We may have found other answers which could help you.
Click here for L Its Picking Bobbin ThreadHow do fill a bobber?
Sew-tric ltd variable speed motor built 1982 6000rpm r007327?
Sewing machine issue?
Singer zigzag 457 Stylist not threading bobbin/making stitch?
Sewing machine starts on its own?
Frister & Rossmann cub 7?