Check the feed dog drop lever near the bobbin area or increase the stitch length dial. Tension is too high or needle eye is too small for thread.
When your machine acts up, referring to the manual’s troubleshooting matrix can save you a costly trip to a repair shop. Here are the standard solutions detailed in the manual for common sewing mishaps:
Guide the thread across the upper thread guide layout on the top lid.
Using high-quality sewing machine oil, apply a single drop to all moving metal parts—especially around the bobbin race area and the needle bar. Check the sides of your machine for marked oiling ports. Note: Never use grease, WD-40, or vegetable oil. Common Troubleshooting