Bobbin case has jumped past its stopper.

For whatever reason top loading sewing machines can jam, when this happens sometimes the bobbin case can be forced past its stopper spring and will need to be reset. This can be done by following the pointers below or checking the machines user guide.

1  Remove the needle plate on the machine, usually held down by two screws.

2  You can now see the bobbin case, it has a small V shaped butt this comes up against the bobbin case stopper spring. The spring is located at the 5 o'clock position as viewed from the front of the machine. If jammed the Butt will now have jumped past the stopper spring.

3  Remove the jammed bobbin case and check for any damage, light damage can be smoothed by using fine emery paper, heavy damage and the case will need to be replaced.

4  Re-seat the bobbin case in the correct position so that the V shaped butt comes up against the bobbin stopper spring.

5  Re-attach the needle plate and try again.