Need a step by step picture info how to thread a Nelco/JC Penny Overlock-Serger model 928.

Question edited for clarity.

They make it with a strange plug that goes into the foot pedal. It looks like you have to buy it complete.

https://www.google.com/search?q=power+cord+for+a+JC+Penney+overlock+serger+sewing+machine+model+7015A

This is a better targeted search query, but still points to Amazon

https://www.google.com/search?q=%22JC+Penney+7015A%22+sewing+machine+power+cord

or here

https://millardsewing.com/product/419451-003/

..

The factory default is the midway point between high & low numbers on each of the tension dials. This is generally the setting for a basic overlock stitch. However, different tension settings is how different stitches are created.

Remove all the threads.
Replace the needle.
ALWAYS RAISE the presser foot and rethread from the beginning.
Verify each thread is in the correct thread path.
ALWAYS THREAD each in the order specified or you will continue to have problems--for a lot of machines, the order is Upper Looper, Lower Looper, then needles.
Check the tension on that particular thread--too tight, it will break.

Breaking thread after about an inch usually indicates it is mis-threaded--a guide has been skipped or threaded out of order or the thread may be wrapped around something.


Serger needle thread breaking sewing discussion topic PatternReview com

http://www.amitymama.com/threads/anyone-have-an-idea-why-my-serger-needle-thread-keeps-breaking.280524

Sew What Up View thread Help Needle thread keeps breaking

Usually, there is a thread guide (picture of how to thread it) on the inside flap when you open it. You can also search online for the manual. Be sure to spell it "manual". Good luck!

try contacting these sites
a1sewingmachines.com
sewvacdoctor.com

try contacting
a1sewingmachines.com
or
sewvacdoctor.com

try these sites--some of these sites you may have to email them about the parts
ebay
sewingpartsonline.com
sew4less.com
sewvacdoctor.com
a1sewingmachines.com

It is, of course, possible to use overlock thread in a typical machine. Generally speaking, you only want to use overlock thread to overlock ("serge"). The reason for this if that while typical all-purpose or sewing machine thread has 3 strings wound together, overlock thread has only 2. When you are using 3, 4, or even 8 threads at a time with a serger, each strand doesn't necessarily have to be as strong as when you are sewing on a machine with only 2 threads. So, you physically could use the thread, yes, but it will not be near as strong, and you will probably have issues with breakage while sewing as well. The cost savings you think you may be saving by using overlock thread (which is, after all, considerably cheaper per yard), well soon be overrun with extra time sewing due to broken threads and overall less quality in your garment as it will be made weaker.