Just bought a serger profinish. Have threaded it correctly but the machine won't run. Spent several hours trying to see what was wrong. Checked with the book and rethreaded it and still will not sew. It is plugged in correctly and the motor is running but does not feed or move the needle.

Operating instructions and manuals are links below ,press the helpful button
http://www.singerco.com/uploads/assets/pdf/14T967_threading.pdf

SINGER 14CG754 ProFinish 2 3 4 Thread Serger With Machine Intro DVD Review

http://janome.com/siteassets/support/manuals/sergers/inst-book-634d.pdf

Laura's Blog: Do it yourself serger repair - How to adjust ...

bangerlm.blogspot.com/2007/.../do-it-yourself-serger-repair-how-to.htm...

Jan 30, 2007 - So I recently did something awful to my serger and the needle broke, the ... Plus it isn't really generic, it is basically some notes for some various olderSinger sergers. ... There were two screws on the bottom plate, plus 4 screws in each of ... If you thread the machine and you can't get the lower looper thread ...

How to fix timing on serger - YouTube

? 4:36
https://www.youtube.com/watch?v=BT6kiYyG2bw
Jul 21, 2013 - Uploaded by Jasmine Harris
Up and close detailed view of how to fix timing on your sergermachine ... looper and lower looper should be when the needle is up or down. .... way I can ever take it into the shop, so unless Ican fix it myself I'm out of luck. .... How to fix the upper looper timing on a Singer serger/overlocker - Duration: 11:02.

[PDF]Singer 14CG754 Serger Commercial Grade Manual.

www.sewingmachinesplus.com/media/.../singer/.../Manual_14CG754.pdf

The order that you thread the machine in is also important. Thread the loopers (things underneath) first, thread the needle last.

you might want to replace the knives
you might have the serger checked for a timing problem
Serger thread breaks


1. Is the serger threaded correctly?


2. Is the needles inserted correctly?


3. Is one of the needles bent or damaged?


4. Is the tension adjusted too tightly?


5. Is the tension adjusted to accommodate thickness of thread being used?


6. Are you using inferior quality thread?


7. Is the thread feeding of the cone/spool freely?


8. Is the needle size correct for the type of fabric being used?


9. Are the needles being used the correct one for the serger?


10. If all of the above suggestions don't help then the serger needs to be checked for a timing problem at a sewing machine repair shop.

Many problems can cause a serger to skip. Start with the correct new needles and good quality thread. Skips can be tension a clearance or timing issue or the amount of thread pulled out by the thread guides. This is not something most consumers can repair. Even with the service manuals they can be difficult. I have spent thousands of hours working on sergers.and skipping at high speed can be difficult to solve. Some brands are more user friendly to service. This like will show some of the common settings and tools needed for a serger service.

SKIPPED STITCHES ON A SERGER

1. Is the needle bent or worn--replace

2. Is the needle inserted correctly into the needle holder--check needle

3. Is the Serger threaded correctly--rethread

4. Is the presser foot pressure right for the fabric--adjust
5. are the needles the correct ones for the serger
6. Possible timing problem--need to be checked at a sewing machine shop

Serger thread breaks
1. Is the serger threaded correctly?
2. Is the needles inserted correctly?
3. Is one of the needles bent or damaged?
4. Is the tension adjusted too tightly?
5. Is the tension adjusted to accommodate thickness of thread being used?
6. Are you using inferior quality thread?
7. Is the thread feeding of the cone/spool freely?
8. Is the needle size correct for the type of fabric being used?
9. Are the needles being used the correct one for the serger?

I have this serger, also. A friend (who knows sergers) and I spent 2 hours today trying to get the lower looper threaded--with no success! There is a diagram in the door of my machine, but it is still very confusing! I'm taking mine to the shop on Monday and have them thread it and show me how to do it!

it could be due to one or more of the following

• Threading is not correct.

check that bobin is not snagging thread,
remove bobin and remove any dust and fluff from bobin area

• Needle is wrong size.
• Needle has been inserted wrong.
• Needle and thread does not match.
• Starting to stitch too fast.
• Thread take-up lever has not been threaded.

• Correctly thread machine.
• Replace needle with correct size.
• Properly insert needle.
• Start machine at a medium speed.
• Check threading order.

I hope this was helpful

Probably the needle hit one of the loopers and left a burr on it that is catching the thread. Run your finger nail acroos the edges of the loopers. If you find a burr it can be polished off using very, very fine crocus paper from a hardware store.
Or the needle hit a the upper looper and knocked it slightly out of position.
After you have it threaded (correctly) turn it slow by hand and watch the loopers very closely. You will probably see what is happening.