I Just Bought A Shark Euro Pro 412 Sewing Machine Just Trying It Out When I Sew The Front Stitch Is Ok The Back Is All Bunched Up,what Is Wrong?

I May Have It Threaded Wrong Please Help!!

Check and make sure that your bobbin is wound tight enough, that you have it threaded out of the bobbin crust correctly, that your tension screw is not too tight and that your case is clean...To be paid sure that your bobbin is tight enough, hold the thread coming off the spool between two fingers ever so gently as you bend a new bobbin,  and give it a little rigidity as it winds onto your bobbin...Betsey
It sounds like your bobbin is to tight ,try to turn it around.

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