SunStar KM-815 KM-825 User Manual (English)

Questions and Answers:

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Rachel WilliamsAug 9, 2025
What to do if the thread keeps breaking on my SunStar KM-815 KM-825?
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  Miss Sheri MurilloAug 9, 2025
  If the thread is breaking on your SunStar Sewing Machine, several factors could be responsible. Ensure the needle is threaded correctly and that the needle isn't bent or have a broken tip; if it does, change the needle. Also, verify that the needle is inserted correctly regarding direction and height. Adjust the upper and lower thread tension if they are too tight. Finally, adjust the stroke level if the working capacity is too much.
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philliphesterAug 14, 2025
Why does the needle break on my SunStar KM-815 KM-825 Sewing Machine?
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  brookshenryAug 14, 2025
  If the needle of your SunStar Sewing Machine is breaking, it might be due to several reasons. First, ensure the needle is correctly inserted. If the needle is bent, replace it. Other potential causes include bad timing of the feed dog, the needle and hook, or an inadequate gap between the needle and hook. In such cases, you should adjust the timing of the feed dog, the timing of the needle and hook, or the gap between them, respectively.
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Laura BowmanAug 19, 2025
Why is my SunStar KM-815 KM-825 skipping stitches?
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  Mrs. Deborah Gilbert DDSAug 19, 2025
  If your SunStar Sewing Machine is skipping stitches, the issue could stem from a few different causes. Make sure the needle is correctly inserted and isn't bent or broken; replace the needle if necessary. Check that the machine is threaded correctly. Bad timing of the needle and hook, or an inadequate gap between them, can also cause skipped stitches; adjust the timing or gap accordingly. Additionally, ensure the upper thread isn't too short by adjusting its volume. Finally, adjust the stroke level if the spring isn't strong enough to pull out the lower thread.
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Ashley HernandezAug 25, 2025
What causes the upper thread to not rotate on a SunStar KM-815 KM-825?
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  Diana LopezAug 25, 2025
  If the upper thread of your SunStar Sewing Machine isn't rotating, it could be due to the upper thread tension being either too tight or too weak. Decrease the upper thread tension if it is too tight, or increase it if it is too weak.
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Eddie WalkerAug 30, 2025
Why won't the lower thread rotate on my SunStar Sewing Machine?
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  deborah34Aug 30, 2025
  If the lower thread isn't rotating on your SunStar Sewing Machine, the tension of either the upper or lower thread might be the problem. If the upper thread tension is too weak, increase it. If the lower thread tension is too strong, decrease it.
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Timothy HernandezSep 3, 2025
What to do if the upper thread falls out when starting to sew with my SunStar Sewing Machine?
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  Joshua GainesSep 4, 2025
  If the upper thread falls out when you start sewing with your SunStar Sewing Machine, it could be due to strong upper thread tension. Adjust the upper thread tension. Another possible reason is that the needle is too thick for the thread, so check the needle.

SunStar KM-815 KM-825 Specifications

General

Type	Mechanical
Stitch Width	5mm
Built-in Needle Threader	No
Free Arm	Yes
Application	Home Use
Stitch Length	4mm
Included Accessories	Buttonhole Foot, Zipper Foot, Button Sewing Foot, Screwdriver, Bobbins