Juki MO-623 Overlock Machine Review


  • This serger has built-in rolled hem capabilities.
  • The three thread overlock option is an excellent choice for overcasting.
  • The knife cutting mechanism can be disengaged as needed.
  • At maximum speed, this machine can turn out 1,500 stitches per minute.
  • The cutting width and stitch length is adjustable.


The Garnet Line of home sergers from Juki, sewers of all experience levels will be capable of producing stunning evening wear or durable sportswear with ease. Offering the ideal blend of flexibility and built-in capabilities, users will be afforded the opportunity to sharpen their skills and flex their creativity. In addition to clothing, this machine can also be used to create home décor items, fashion accessories, and even crafts. Backed by a solid warranty from the manufacturer, the Juki MO-623 (see today’s price on Amazon) is a serger any sewer would be proud to own.


  • Because it only weighs 20 pounds, the Juki MO-623 is readily portable.
  • The color coded threading system makes it simple to thread this serger.
  • The thread tension can be easily adjusted with the turn of a dial.


  • Because it is a 110-volt machine, it can only be used in Canada and the United States.
  • The warranty is not as long as those offered by other manufacturers.

Product Description

Although a relatively young brand, the Juki name has quickly become synonymous with quality and affordability. The Juki MO-623 is no exception. This model is a one need, 3 thread overlock machine. Its straightforward design makes it ideal for sewers of all experience levels to use. It comes with a user’s manual and instructional DVD to help users learn how to make the most of what the model has to offer.

Threading this serger is very simple. All one has to do is follow the color-coded threading path system and slip the thread into the guides. Adjusting and maintaining thread tension is not difficult either. The one rotation thread dials have standard tensions highlighted for consistent and simple adjustment. Uniquely designed guides are guaranteed to keep the thread in place – regardless of the speed, one is sewing at.

The machine is also equipped with a built-in seam guide that is intended to take the guesswork out of seam allowances. The guard cover has a readily accessible gauge that can be used to create precise seams. In addition to the guide, another handy feature is this model’s built-in rolled hem features. If a user wants to create a rolled hem, the only thing they have to do is flip a switch. There is no need to halt their project just to change out a presser foot or plate.

The sewing plate is backlit by bright LED lights to help users in the needle and fabric areas. Another feature of this model that reviewers have particularly enjoyed is its retractable upper and lower knife system. This knife system is equipped with its own dedicated drive to ensure that it provides consistent and smooth cutting on a diverse range of fabrics. With regards to presser feet, the Juki MO-623 comes with only one, but it is designed to be used for multiple purposes, including adding overlock stitches or adding ribbon or elastic to a project. Additional Juki specialty feet can be purchased as needed.

The warranty on the MO-623 offered by Juki has been a point of contention among reviewers. All Juki sergers have a 5 year warranty on all mechanical components and a 2 year warranty on its electric components. Juki offers a 90-day warranty on all labor. This warranty is not as comprehensive as the ones offered by manufacturers like Brother and Singer. The problem lies in the fact that Juki states that, if any home serger is used for commercial purposes, the warranties become null and void. Some sewers have felt that this addendum has been used to deny needed repairs unfairly. 

Juki 1-Needle, 3-Thread Overlock Machine MO-623
  • No need to change needle plate to convert to rolled hem, its built in!
  • 3 Thread for Overcasting; 2-Thread Adaptor Available
  • Disengageable Knife Cutting Mechanism
  • Up to 1500 Stitches Per Minute Speed

Final Thoughts

Overall, the Juki MO-623 has won favorable reviews from users. More experienced sewers might prefer a serger that offers 4 or 5 thread options, but the design of this particular model is user-friendly and intuitive – making it ideal for beginners. The instructional aids provided by Juki make it even simpler to use. With its affordable price tag, this machine makes an excellent investment for those who are new to the wonderful world of serging.

Leave a Comment