loose bottom stitch?

Hello Alex,
Start at the beginning, ,ake sure the presser foot is up when you thread the machine, top tension about 4 or 5, you should be able to pull the bottom thread through with slight resistence, if it is too tight loosen the large screw on the bobbin case about a quarter of a turn at a time anti clockwise and test sew.

drivewithken
November 2009