I don't know your Kenmore, but it would help if you could let us know the model or post a picture. Depending on the age of the model; check for needle in the correct way; bobbin goes in the correct way from which it is wound; correct bobbins for your model; double or even triple check correct threading with the manual ; and make sure the bobbin thread is fully in the tension spring in the case. Check top tension too; thread inbetween the disk and gradual increase as you turn the tension up (check by pulling on the thread when machine is threaded up).
Last edited by Mickey2; 09-28-2016 at 05:43 AM.