Singer 237 problem
A friend of mine has a 237 that won't sew. I looked at it and think I found the problem. When the oscillating hook takes the thread around the bobbin case, it goes only to the bottom of the case and then reverses itself, leaving the thread at the bottom center of the bobbin case. When the take-up arm pulls on the thread, the thread does not continue around the bobbin case, it stays at the dead center bottom.
I'm guessing this is a timing issue in that the hook doesn't go far enough around the bobbin before releasing the thread. Does that sound right? If so, how do I adjust it? Any tutorials or guides?
Tate