If you have a jammed or seized sewing machine, and it just won't go, there may be a simple explanation.
Not all sewing machines work like this one, but many do.
There are many reasons for a jammed sewing machine and this is a common one.

This video shows the symptom and the easy fix.

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Web Site - http://www.institches.co.nz

Index:
0:00 - Explaining the symptom and fix
1:23 - A look inside the machine
4:33 - Thanks