We may have found other answers which could help you.
Click here for Drive Belt SewingFrister & Rossmann cub 7?
How to switch on light of sewing machine?
How can I mend my Frister & Rossmann sewing machine?
Singer zigzag 457 Stylist not threading bobbin/making stitch?
Sewing machine starts on its own?
The thread loops under the fa?