Elna Pro 4De serger thread breaking

SOURCE: brother serger thread

The lower looper thread MUST be threaded before the needles are threaded. You must also be sure the lower looper thread is pushed and staying all the way to the left before it is threaded through the looper eye. Double check the threading diagram and count the number of guides the thread passes through. Count how many guides you have actually passed it through. It must be the same. The dealer you bought it from should be willing to show you if you can't figure it out.
sewman7

SOURCE: I've lost my manual and video need threading info

One of the most common mistakes with overlockers is that the threads must always be threaded in order. So if you sew about 1 inch and the thread breaks try unthreading the eyes of the needles rethread the looper and then rethread the eyes of thew needles. If not you will get the same result of sewing about 1 inch and it will break again.

SOURCE: My serger will only sew a few inches, then the

Been there, done that. Old serger almost went out the window more than once.

Raise the thread antenna and loopers to their highest positions.

Set the tensions to zero. If your serger has auto-tension, raise the presser foot as this also opens the tensions.

Begin threading from the right as indicated in your manual or on the door of the serger.

If this continues, the serger may need to be serviced as the timing could be the problem.

Ask before leaving the serger as the service cost usually starts around $100.

I finally gave in and bought a Babylock with instant jet-air threading.

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.

SOURCE: I have threaded my Janome

It's quite possible you have the thread tension too tight, or loose.