My Featherweight's lever doesn't move to the next line! I would need the whole mechanism (or carriage?).  (I know there are some featherweights without the line advance mechanism but mine has it) I am not sure what functional mechanics are supposed to look like but I am sure the mechanics on mine do not work. I was thinking of buying a cheap machine for the parts from ebay but how would I know that that one's mechanism functions? I've never done this operation before but I want my featherweight to function.

Thanks
Noah
New York