While you wait for answers, we may have found some information which could help you.
Click here for Stitch Thread FabricWhere do i oil my Kenmore 6 stitch model # 158 13400 ?
What size motor does this model have 158.14300 ?
How do I troubleshoot a Kenmore sewing machine 1972 zig zag?
How do fill a bobber?
Kenmore 158.12511 stopped sewing?
Why won't Sears Kenmore 158.14001 stitch length turn?