My needle does not stay threaded on my Brother Lx 3125 (the top thread) it keeps coming out of the needle while stitching. How can I fix this?

Pull more thread tail through the needle eye and hold the thread tail in your left hand when you begin the first couple of stitches. It also helps to have the needle at its highest point when beginning the first stitch.

hi Lori.
at this link you will see some diagrams that might help you out.

diagram of threading brother LX 3125 sewing machine Google Search
you could also try this one.
diagram of threading brother LX 3125 sewing machine Google Search

Hm, am wondering if this is thread nesting or bird nesting. Frequently, it will create a knot or huge glob of thread on the underside of the fabric.

Be sure to start out with a brand new needle.
Remove the upper thread from the machine.
ALWAYS RAISE the presser foot and rethread from the beginning.
Set the upper tension at the midway point between high & low numbers. (This is a beginning point but may need tweaking for your particular machine. Tension is correct when the upper and bobbin threads meet in the middle of the fabric.)
Pull the bobbin thread to the top of your fabric before beginning to stitch.
How and Why to Bring up the Bobbin Thread

Begin stitching slowly.


Sewing Machine Thread Bunching Up Here Why

What causes Bird Nests Superior Threads

Birds nest under the fabric big loops of thread top side looks good...

same old problem, the needle is to short. Loosen the needle screw and drop the needle down just a little at a time

Hai Kim, Please change the correct size needle. Otherwise corrected the design in computer. For ex: stitches 12,702 decrease the design some 1000 or 2000 stitches.

rethread the machine top & bobbin
change the needle
make sure the bobbin is not warped
clean under the needle plate & in the bobbin area for loose thread or lint

Make sure presser foot UP position. Rethread making sure thread is taut so it can locate tension slots. Rethread needle making sure its up in the needle bar shaft--flat side BACK--thread goes through needle eye front to back. Tension: 4 Jimmy

Most likely your machine is not threaded right, read your manual closely and double check yourself. Rethread your machine, no mixed thread use same weight, color does not matter but weight does. With your presser foot down, your top thread should be had to pull, with it up it should pull freely. Make sure your bobbin is wound evenly, and on a fresh bobbin. Then put in a new needle. Now, if the machine is still acting up, it may be your timing. You can call Brother at 1-877-276-8437 customer support. if you need a manual, go to www.brother-usa.com. I am answering this for free just to try to help you. Good luck

Mine did the same thing. The needle is probably to high. Do not insert the needle all the way to the top. Lower it a bit and it should zig zag!

You should hold the end of the thread coming through the needle until the thread has grasped the bobbin thread.