Kenmore 17921 Owner's Manual page 30

POSSIBLY EASY CORRECTION
Choose correct size needle for thread and fabric.
Rethread machine; check tension spring threading.
Tighten upper thread tension.
Do not pull fabric; guide it gently.
Increase prpssure on presser foot.
Reset presser foot.
Rewind bobbin.
Replace needleplate, or polish off burrs completely.
Do not pull fabric; guide it gently.
Choose correct size needle for thread and fabric,
Reset needle.
Reset presser foot.
When starting a seam be sure to draw both threads under and back of presser foot
about 4" and hold until a few stitches are formed.
Reset thread tension(s).
Increase pressure on presser foot.
Upper thread and bobbin thread should be same size and kind.
Insert new needle.
Reset presser foot.
Use underlay of tissue paper,
Choose correct size needle for thread and fabric.
Use "Q NEEDLE'"" and "'Q FOOT"".
Insert new needle.
Reset needle.
Loosen upper thread tension.
Increase pressure on presser foot.
Start to stitch at a medium speed.
Rethread machine.
Loosen upper thread tension.
Choose correct size needle for thread and fabric.
Insert new needle.
Replace needleplate, or polish off burrs completely.
Check bobbin case threading.
Clean bobbin case and shuttle.
Remove feed cover plate.
Increase pressure on presser foot.
Place both threads back under presser foot before beginning to stitch.
Disassemble and clean shuttle.
Replace needle.
Replace needle plate.
Push in clutch.
Check plug,
Push to on position.
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