Thanks for the advice. Yes, class 15 bobbins.
Oh, and my thread guide was not screwed on, that would be too easy. It was welded. It was loose when I got the machine and one day it just fell off.
As for disassembling the tension assembly - gosh that scares me!! I expect if this continues to happen I'll have to do that. Hope there are some good tutes on the web to guide me. I have discovered that it doesn't freewheel forever. I think I can do about 6 complete revolutions.
Last edited by KenmoreGal2; 11-26-2014 at 09:13 AM.