I have a Singer Fashion Plate Model 237. When you are sewing, no stitches. I've check the tension it's threaded correctly. Does not show a stitch, have no idea on what to check

Check your stitch sample. Is it actually the top thread showing under the fabric, or is it really the bobbin thread. Generally, thread problems under the fabric are an upper thread problem. Thread issues above the fabric is a bobbin issue.

Try a brand new needle.
Remove the top thread from the machine.
ALWAYS RAISE the presser foot and rethread.
Remove the bobbin, check that it is wound smoothly, and install and thread the bobbin case making sure the bobbin spins the correct direction.
From that point, there may need to be some tension adjustments required.

Understanding Thread Tension Threads

If the problem continues, you may need to have it serviced. Perhaps there is a burr or snag somewhere that is interfering with the thread in the thread path.

Frequently Asked Questions Singer Sewing

Skipped stitches
1. A bent or dull needle
2. The wrong needle for your fabric
knit fabrics require a jersey or ballpoint tip. Most wovens do well with a universal tip, and specialty fibers, like leather or metallic, usually require specific needles.
3. Incorrect machine threading
4. Unbalanced needle thread tension
Start by making relatively small changes and run a test stitch to evaluate the impact. If you need to adjust the tension dial using woven cotton fabric with good quality all-purpose thread and a new needle
5.check the needle is inserted correctly. The needle needs to be pushed as far up the needle shaft as possible. It's easy to insert the needle half way, clamp it down and think it is inserted correctly.
the flat part of the needle should be positioned towards the back. If the needle is not inserted correctly, it will not be able to pull up the bobbin thread and will cause skipped stitches.
6. If the suggestions don't help then it is time for a tune-up.

Hi, if stitches are off, there is a problem with balance between the upper and lower stitch adjustments. You have to tweak these. Also, make sure there is no lint in the bobbin case area or under the feeddogs. Here is an excellent blog for 237 Fashion Mate owners. You are lucky to have one of these from the 1960's. http://blog.sew-classic.com/2010/02/02/singer-237-fashion-mate-sewing-machine-reveiw.aspx
Happy Sewing!

Check the threading and tension on the top thread. It is the one that affects the stitch on the bottom. It may be hung up somewhere if it's not threaded correctly or the tension might be too tight. Also double check the size of your needle and make sure it is correct for the type of fabric. Most likely it is the tension. Double check the tension by sewing a wide zig zag stitch and examining the top and under side to see if they look identical and not puckered or too loose.

try changing the needle
check the top thread tension
check to make sure the bobbin is inserted in the bobbin case correctly
check to make sure the bobbin case is correctly inserted into machine

start with a deep clean and oil. check tensions, top and bottom-stitch should "lock" inside the fabric. make sure you use same thread on bobbin as on the machine. Check needle for nicks or bent. Make thread is threaded correctly, passing through upper tension plate. check tension plate(upper) for rust or lint.

FYI.. Loops on the bottom, problem is on the top..
Loops on the top, broblem is with the bobbin.

Could be a tension issue.

Try this to see if it helps:
Remove top thread.
ALWAYS RAISE the presser foot and rethread from the beginning.
Start the top tension set at the midway point and then adjust.
Check that the bobbin is threaded and installed correctly.

Understanding Thread Tension Threads

Sewing Lesson 10 How to Fix Tension on Your Sewing Machine

it sounds like you might need a new bobbin case to me try that and see if the issues you are having stop hope this helps