How do I fix Singer model 774?

Need a service manual for a Singer Treadle Sewing Machine Model 66-1?

Singer 507?

Singer 201 went bang , smelt and now won’t work?

My CG 500/550 Singer Sewing Machine's bobbin isn't working?

1965 Singer 275k sewing machine foot pedal?

Presser foot is loose?

the thread is bunching on underside of fabric it looks like birdnest?

Need an equivalent to an old Hunts WA71 capacitor/rectifier?

Singer zigzag 457 Stylist not threading bobbin/making stitch?

Bobbin won't wind?

What size needles can I use for my Singer 39a3?

Engine revving up ?