I acquired a 600E, my question has to do with the bobbin. It does not want to lock in. Was sewing ok but
then decided to clean & oil it. So now the bobbin case will not lock in, does it need to have a bobbin in the case/holder? The black lever on the right will just come all the way out and not exactly sure where it locks into the case/holder, does any one have any pic's or explain it to me.
Thank you.