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Mend Shark 412n Bobbin Thread Stitch

shark 30n stitch sewing machine?

I am trying to hem my slacks but the bobbin thread keeps bunching. I have followed the instructions but it still doesn't work. Can anyone help me? It' s shark model 412n.

Gena
January 2007
To stop the bunching I just used compressed air (like a keyboard cleaner) to clean out the bobbin compartment, especially the bobbin tension. I'm sure you have tried similar things, good luck.

Sarah
June 2007

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