Question about Kenmore 16622 Mechanical Sewing Machine

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My brand new Kenmore serger model 16677 was working correctly until a broken thread caused me to re-thread it. Since then I have rethreaded it correctly numerous times and each time I try to chain off stitches to get started the chain stitch is not forming. Instead the threads just come straight out unchanged. If I attempt to serge fabric the only stitches that show up are the straight stitches made by the left and right needles. Please help. I am at my wit's end.

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  • Anonymous Mar 13, 2014

    left needle on my kenmore serger 16677 skips stitches



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The loopers must be threaded before the needles.

Make sure that the needles are not threaded. Thread the loopers and have the loose ends behind the presser foot. Then re-thread the needles and place a scrap of fabric under the foot and sew. Make sure that the edge of the fabric is not to the right of the plate, but where it would be if the knife had cut it.

Posted on Jun 17, 2009

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I recently made a deal with a lady to trade her serger for my labor. I'm a professional seamstress and I just landed this awesome sewing machine. I, too, was having so many problems when trying to re-thread this machine. It's very tricky. You must have the "Looper Threader". This is the greatest tool since sliced bread. Never thought I'd say that! But, believe me when I say this. With little money to actually purchase this little gem of a tool, I decided to make my very own. It's works perfectly and I have had absolutely no problems in re-threading my machine since I made this. Funny, because the tool itself is not expensive at all. But, because I'm very capable of doing this sort of thing, that's what I did.
Hope this helps for you.
Happy sewing!

Posted on Sep 16, 2009


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Most serger misbehaviour broken thread problems are due to mis-threading. Remove all the threads from the machine.
ALWAYS RAISE the presser foot.
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Could be the result of several things. There could be some gunk or threads stuck in the tension disk. Be sure to remove the thread and rethread from the beginning in the order specified. ALWAYS RAISE the presser foot when threading!!!! If you haven't tried a brand new needle, do so, and make sure it is pushed all the way up and installed with the flat side facing the correct direction. Some machines recommend #90 as the largest needle to use. Also, perhaps the needle eye is too small to accommodate the thread. Watch where the thread is breaking to give you an idea of where the problem may originate. Try a different brand of thread. Sometimes black thread causes issues because the heavy dye affects the thread. Set the tensions at the midway point and then loosen the tension on that one needle. There could also be a burr or rough spot somewhere along the threadpath that is catching the thread. Last idea--could be a timing issue.

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I have a white speed lock 234 serger and cannot get it to chain off. The thread bunches together

Yes, thread the upper looper first, the lower looper next.

***Make sure that you have the presser foot RAISED during the ENTIRE threading process until you get to the point of threading the needles.

The second to last step in the lower looper process is to make sure lower looper thread DRAPES over the top of the upper looper & thread, then both thread tails get pulled under the presser foot and toward the back of the machine.

Give each thread a little extra tug as it goes through the tension disk to make sure it is seated. Verify that all the threading steps have been followed. Any skipped steps, extra thread wraps, or incorrect threading will most likely cause a problem.

Make sure you have brand new needles before threading. If one is bent or damaged, you will probably have issues with skipped stitches.

Set all the tensions to the midway point (the factory standard for regular chain stitch). The tensions can then be tweaked when the machine is correctly creating a chain.

If the machine messes up, breaks a thread, comes unthreaded, etc., save yourself some time and frustration and RETHREAD everything from the beginning. Trying to rethread out of order usually fails!!!

Once you are more comfortable with your machine, you can try fishing a thread, but even experienced serger users still have trouble with this.


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Always Raise the Presser Foot then rethread the machine from the beginning. Check that the thread path is correct. Incorrect threading will also cause thread to break. (Make sure the thread is not hanging up on the thread spool causing it to break.)

Set the upper tension somewhere around the midway point (this is the standard factory setting). Test. You will probably need to tweak the tension to get it where the two threads meet in the middle of the fabric.

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Usually, if the machine breaks thread, it is because it is threaded incorrectly, the tension is too tight, or there could be a bad needle. Make sure you are using the correct needle and inserting it properly.

Check to make sure the thread coming from the spool is not wrapped around something that it shouldn't, ie the spool pin or the thread tree.

Unthread everything, RAISE the presser foot, then rethread from the very beginning making sure the threads seat properly in the tension disks.

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Set all the tension dials to the midway point to test your stitching. HINT: it helps to thread with 3 different colors so you can determine which threads are presenting a problem.

When a thread breaks, it is best to rethread everything from the beginning. Sergers are very finicky machines and even if you try to rethread only the broken thread, they will generally refuse to work.


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3. Is one of the needles bent or damaged?
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5. Is the tension adjusted to accommodate thickness of thread being used?
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Go to It's the sight for Sears manuals. This is the original owner's manual available for download.

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