While you wait for answers, we may have found some information which could help you.
Click here for Machine Thread Bobbin ToldKenmore 158.14001 Stitch length knob now turns, won't change length?
How do I troubleshoot a Kenmore sewing machine 1972 zig zag?
How do I resync a385.16221300 the needle hits the bottom plate ?
How do fill a bobber?
Where do i oil my Kenmore 6 stitch model # 158 13400 ?
Why won't Sears Kenmore 158.14001 stitch length turn?