We may have found other answers which could help you.
Click here for Sewing Machine Thread Tension
Kenmore 158.12511 stopped sewing?
Kenmore 158.14001 Stitch length knob now turns, won't change length?
How do fill a bobber?
How do I resync a385.16221300 the needle hits the bottom plate ?
Kenmore sewing machine #15814300?
n o reverse?