Sounds like the timing is off (the needle is arriving at the bobbin at the wrong time and colliding with something in the bobbin area). Take it for service or search the internet for sewing machine timing instructions. There are tons of web sites and videos.
Answers & Comments
Sounds like the timing is off (the needle is arriving at the bobbin at the wrong time and colliding with something in the bobbin area). Take it for service or search the internet for sewing machine timing instructions. There are tons of web sites and videos.
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