We may have found other answers which could help you.
Click here for Runs Minutes Slows
Singer sewing machine 626 kno?
Singer 188K1 presser bar stuck?
the thread is bunching on underside of fabric it looks like birdnest?
My CG 500/550 Singer Sewing Machine's bobbin isn't working?
Singer 201 went bang , smelt and now won’t work?
Singer 507?