How do you set the timing up on a singer 413?

Singer zigzag 457 Stylist not threading bobbin/making stitch?

Singer 507?

Bobbin won't wind?

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

1965 Singer 275k sewing machine foot pedal?

Presser foot is loose?

Engine revving up ?

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

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

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

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

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