My 221 feather sew really good in very good shape, has been cleaned & serviced.
I can sew away and do well, then the top may not sew well, but mostly the bottom has trouble.
I can rethread one or more times and it works again. The bottom I keep having trouble with.
I take bobbin out redo and redo no help. It has no problem coming up and to top thread and begin
Sewing but the bottom stiches are hit and miss a mess at times and then ok.
Any ideas? Thanks!