Right looper tread won't stay threaded properly

SOURCE: unable to thread lower looper on Babylock Eclipse BLE1SX

On rare occasions lint can clog the yubes on these sergers. One of the first things I do is thread the wire through in the opposite direction. It will sometimes push the blockage out. The other option is to use an air compressor and again blow the lint out from the opposite side. If this does not work take it to a service man.

SOURCE: Baby Lock Evolve wire Looper threading tool

You have to get the replacement wires from a Babylock dealer, I did too then after sticker shock at the price of that wire I learned to make a thread cradle and use that to thread difficult threads no. Take about 24 inches of regular sewing thread and fold it in half, put the open ends (together, same legnth) into the jet air port and hold onto the loop end, press the jet air threader and it will thread the machine, insert the thread you want to use into the loop you have in your hand and pull it thru the machine using the ends of the thread you put thru the machine, sounds harder than it is and works all the time. No more spending $8 on replacement wires. You can use this method for all the jet air sergers.

SOURCE: treading my serger

When you thread the serger, your suppose to start threading the 3rd spool (left to right) first, then the 4th spool, then thread the 2nd spool which ends up in the second needle (left to right), There is a lever or bottom looper that the thread must go through before placing thread through the 2nd needle. Finally, the last spool to thread is the 1st spool (left to right). Follow the threading pattern and once you put the thread through the two loops that look like springs, turn the wheel at the right toward you until you can see like a lever with a ****, thread that **** from the back then put the thread through the machine to the right. Turn the knob to toward you again until the upper looper is showing, then you have the put your thread through the hole in that looper then through the first needle. You should now have 4 thread toward the back of your machine which you need to place under the presser foot and to the left side of the machine. There is also a VHS video that goes with the machine to help explain how to thread your serger. Also be sure that each spool of thread is in the tension of the upper colored tension wheels. If it is not, then your stitiches will be loose. Good luck and I hope this helps. I had to watch the video several times before I got it. If you don't have the video, try ebay for and perhaps you can obtain one. The video is Speedylock 1600, instructional video, USA Part #136000016, Perhaps you can contact White and see if they have one you could purchase.
Good Luck Serging!!!!

SOURCE: thread continually breaking in lower looper needle

I was having this very same problem with my lower looper . I had been using the one needle stitching all afternoon and I was doing quite nice stitching. then I decided to put the right needle back in and do some overlock stitching and guess what I spent the next two hours fighting the looper problem. I had completely re-thread this machine at least 20 times now. I decided to take the needle out and re-insert it and re-thread it one more time (right lower looper- then upper looper- right needle- then left needle) was careful to pull all threads to the back and under the presser foot for about 6 inches.
Held on to the thread, lowered presser foot and did the chaining stitch. BINGO it didn't break, tried it with a piece of cloth and Perfect stitches. I have a Babylock BL402 and used tension settings left to right
4-3-3-3 and default settings for the rest.
Hope this helps someone someday.
Jo Griffith

SOURCE: kenmore serger 3/4D, bottom looper

Try looking for a free download on wiki, manage my life, or just plain google with your model number, someone will have your answer. As a last resort try tias.com or retrevo, or just plain Kenmore.com customer support.