Question about Kenmore 756A-30BH Mechanical Sewing Machine

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Kenmore Model 385.16231300

Apparently google has not heard too much about my machine. I have a problem with my bobbin thread. I have been sewing on this machine for a few years now and have always had a tiny bit of bobbin problem. I am now trying to sew a hem to denim and my bobbin tension is nonexistant.

My manual says to adjust the bobbin treading mess with the tension on my top stitch. That is not helping too much. There is not bobbin casing to adjust the tension and my manual does not show how to properly place the bobbin. My guess is that I am not laying out the thread properly when I put the bobbin in. I can't find any pictures on how this should look.

Please help,


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Re: Kenmore Model 385.16231300

I discovered the same problem. What I figured out (after having the machine "repaired" several times) is that it seems as if the bobbin type may be the suspect. I started looking closely and it seems as if I have 2 different types of bobbins. So, I tried both types. Since I don't know the bobbin number(s), you will have to put up with my description .... the bobbin that is flat, top & bottom, seems to bunch up. The bobbin "bounces" when I sew. The bobbins that are rounded on the top and bottom don't seem to "bounce" and it doesn't bunch up the lower thread. Now, I have read my manual front to back and it does not say what bobbin type or number to use. So, if anyone knows, it would be a great help. I am assuming the correct bobbin is the "class 66" bobbin. Does anyone know for sure?

Posted on Apr 29, 2011

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