Turn the tension up on the bobbin case. There is a small slotted screw on the bobbin case, usually at the 6 oclock position when the case is in the machine. There should be a small screwdriver in your kit. Turn the tension screw 1/2 turn and try it. No luck, try another 1/2 turn. If its no difference then set back to the original place. Sometimes junk gets jammed behind the tension plates in the bobbin case, they will cause this. A dealer may be the only solution.
Derek
74 views
Usually answered in minutes!
×