We may have found other answers which could help you.
Click here for Rossman Sewing MachineHow can I mend my Frister & Rossmann sewing machine?
Singer zigzag 457 Stylist not threading bobbin/making stitch?
Toyota SL3404D Overlocker leaving big loops?
Frister & Rossmann cub 7?
Sewing machine issue?
Presser foot level, needle and thread guide have fallen out?