The 744D I have does not automatically thread. There is a tiny L shaped metal piece that you push toward that back of the machine and it pulls that little eye out so you can see it. When it is threaded, then you pull that little L shaped thing back. I wish I could show you, it's hard to explain since I don't know the technical name for parts!
Threading is simplified by color-coded thread guides and a self-threading lower looper. Simply lay the thread into the guide, flip the switch, and the lower looper is threaded. The guide is automatically returned to its normal position when you turn the balance wheel.
Hope this helps, Please Vote. Thanks and good luck!
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