I'm having difficulty with my Shark Euro-Pro 373. The bobbin won't thread with the top thread, and the top thread keeps collecting under the bottom of the material. I haven't tried much regarding fixing it since I can't find my manual. I'm not sure if pushing down on the peddle all the way makes a difference or not. Thanks!
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Re: Bobbin won't thread
Sounds like the bottom tension is to slack.
Look at the side of your bobbin case, when you thread the bobbin thread part of the route it runs is under a flat leaf spring. There is usually 2 very small scews on this leaf spring one screw holds the spring onto the casing and will be tight. The other is the tension adjuster screw, turn this screw clockwise half a turn at a time. After each half turn pull the bobbin thread until slight resistance is felt. Then try sewing if bunching/tangles still occur more tension is required, this is trial and error until the tension is corrert.
If you want a new manual try this website if your machine is not listed email them and they will try to help. www.sewusa.com
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make sure there is a 3-5 inch tail on bobbin thread
make sure there is a 3-5 inch tail on top thread, then hold the top thread tail with your fingers (away from the needle) & with your other hand turn the hand wheel manually on the right side of the sewing machine,, slowly letting down the needle down into the bobbin area & see if the bobbin thread will pick up this way
Try adusting the bobbin thread instead of the top. Always make sure to insert the bobbin so the thread is pulling in a clock wise direction. Both threads top and bobbin should have about the same resitance when pulled.