Stop motion knob not working
 

Hi,
I've just got a Jones 641 sewing machine but I can't seem to work out how to wind the bobbin. I've looked in the manual online and I'm meant to turn the stop motion knob to loosen it... Well I loosen it, the knob itself is loose but the machine sews anyway! The bobbin pin doesn't spin and the machine continues as if it wasn't loose. The knob spins approx 90 degrees loosely before i can feel it 'hit' something hard on one side or tighten the other way. Whichever way I go, after that 90 degrees the whole thing spins with it. Someone help please!

I have a blog with instructions on how to clean the bobbin winder clutch, but I can't post it here. So I sent you a private message.

Welcome, Newbie1234. I'm guessing that this is a machine that hasn't been cleaned and serviced. I see that you are from GB. Here in the USA we generally recommend cleaning the internals and dried oil with Kerosene, but I believe you call it Paraffin.

I found three sites that talk about taking the hand wheel and stop motion clutch apart and putting it back together.
http://shesasewingmachinemechanic.bl...er-clutch.html ;)
https://oldsingersewingmachineblog.c...nger-part-two/
http://vssmb.blogspot.com/2012/06/ho...bbed-stop.html

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