We may have found other answers which could help you.
Click here for Sewing Time TopHow do fill a bobber?
Sewing machine starts on its own?
Toyota SL3404D Overlocker leaving big loops?
Sew-tric ltd variable speed motor built 1982 6000rpm r007327?
Parts spares?
Singer zigzag 457 Stylist not threading bobbin/making stitch?