I have a Necchi 537FA sewing machine. It sill sew about 39 stitches and then the thread gets caught in the bobbin area and stope sewing. I've cleaned, changed bobbins, spent time trying to fix the problem. Please help. Pat

Hm, I'm not able to locate a manual but may be able to offer some suggestions.

Remove the top thread from the machine.
AVOID OLD OR BARGAIN BIN THREAD!
Use the same thread in top and bobbin.
Be sure to use a brand new needle--needs to be compatible with the thread and fabric of the project..
ALWAYS RAISE the presser foot and rethread from the beginning.
Set the top tension to the midway point.
Verify the bobbin is loaded and threaded correctly and it turns the correct direction.
Pull the bobbin thread up through the fabric before taking the first stitch. It also helps to hold both thread tails in your left hand when taking the first stitches.
Test your machine and tweak the top tension until the top and bobbin threads meet in the middle of the fabric. (Increased top tension will pull the bobbin thread up. Decreased top tension will allow the bobbin thread to pull the top thread down.)

How to Thread Necchi Sewing Machine

How to Thread Necchi 535FA 535 534FB 534 Sewing Machine and Bobbin Case (not your model, but the threading and basic instructions will be similar or the same as your machine)

How to thread Necchi model 535 FA sewing machine now with captions

loops under fabric means top tension needs to be tightened
try cleaning the top tension dial with some unwaxed dental floss and see if that helps. if it doesn't then the tension dial may need to be replaced
also check to make sure the spool of thread is not getting caught on the spool holder
also try a new needle--one that is correct for the fabric being sewed

try these suggestions
change the needle
make sure the thread doesn't come off the thread take up lever--this
can jam the machine
make sure the bobbin is turned the right way in the bobbin case--this
can cause problems if the bobbin is turned the wrong way
make sure the bobbin is not warped or damaged
make sure there are no burrs in the bobbin area or on the needle
plate

put in a new needle

clean under needle plate for loose threads or lint

clean bobbin area for same

check the top tension to make sure it correct for the fabric

make sure its threaded correctly top & bobbin

make sure the top thread does not come off the thread take up lever

Have you recently changed the needle? If so, please check if it is in the right way, flat shank to the back. This is easy to get wrong and will prevent stitch formation as the scarf at the back of the needle (scooped out area) is where the rotary hook goes to catch the thread during stitching.

Hello

Primary causes of upper thread breakage:


-- misthreading: pull all the thread off and thread again, using the manual, step by step. Read each step aloud before you do it. (sounds dumb, but helps.) (And make sure you thread the takeup lever!)

-- thread has wrapped itself around a thread guide or spool pin from one of the breaks. Take the spool off the machine before rethreading.

-- bad or damaged needle. Replace with the right size for the fabric, turned correctly (backwards needles skip stitches)

-- dirty machine, especially in the bobbin case area: review cleaning instructions and do it, using brush and vacuum only

-- bad/cheap thread: should not be slubby or break easy. Try another spool.

-- top thread tension too tight. 4 is normal for most fabrics, most stitches.

Tips;

1) do a light cleaning (brush and vacuum) every day you sit down to sew.

2) replace the needle if you hear it hit metal, if you've got a really bad thread jam, if you see it deflect as you sew (for instance, sewing over the side seam on jeans when hemming). Replace every 3-8 hours of actual stitching time anyhow.

3) buy good quality thread

4) when your machine isn't sewing right, stop; take all the thread off of/out of the machine (bobbin out of bobbin case, spool off spool pin) and give it a quick cleaning. Rethread from scratch, carefully. If that doesn't fix it, do it again, then replace needle and rethread one more time, manual in hand (yah, even if you've threaded it 8 million times before). #4 is curative about 98% of the time. The other 2% often requires professional attention.

check your needle to see if it's damaged
some sewing machines jam in the bobbin area when the thread comes off the thread take up lever
check the bobbin & bobbin case for burrs

try sites for manuals
sew usa
sewing manual.com
ebay

Did you catch it through the little wire on the top area of the needle? I had the same problem; also had two different types of thread (I think) in the bobbin versus the spool. Once I changed to the same type of thread and made sure I had caught through the little wire it was okay. My problem is that I cannot get it to do the stretch stitches!

www.ifixmachines.com has lots of parts fitted to your sewing machine for a cheaper price