Help with threading an Overlocker

Threading needles
Loosen the tensions all the way down to zero when threading. This allows the thread to properly seat itself between the tension disks. Reset the tensions after threading is completed. You have to turn those dials! Some modern overlockers have a tension release and do not need to be reset manually.

If you tie on to rethread "dont sew the knots through your machine!" Set the tension to zero, work the chain loose behind the foot, and pull one or all the threads through by hand. Use the tweezers and grab the thread behind the eye to pull one thread through at a time. Unthread the needle eyes before pulling the thread through so you don't bend the needles!

How to thread loopers
If the lower looper thread breaks, "always un-thread the needles before threading the lower looper" If you don't, the needle thread will be trapped between the lower looper and the lower looper thread. You will have to rethread because the lower looper thread will break again when you take a stitch. When the needle threads are first threaded, the thread goes through the eye and straight back. When the first stitch is made, the needle thread goes under the needle plate and wraps around the lower looper from front to back and then goes into the thread chain. If you thread the lower looper from scratch and leave the needle threads wrapped around the lower looper, the needle threads will be trapped and cause the lower looper thread to break repeatedly until you remove the needle threads from being trapped between the lower looper and the lower looper thread.

Always thread a overlocker in the correct order. This may vary from brand to brand so check the manual for the recommended threading order. This is an important step to follow. This helps reduce the chance of trapping the threads. Make sure to get comfortable with the threading order for your overlocker.