On necchi model 537L which buttons are for stitch length

Doing a google search for the brand plus model number for a user guide or YouTube videos might find what you are looking for. That it is a Necchi doesn't supply the model number and of course models differ. On a 537L model, the large knob on the right side about halfway between the top and bottom of the machine adjusts stitch length. The numbers may range from 0 to 5 with 0 meaning no length and 5 being the largest length. Tension, stitch length and stitch width are all controlled by small dials on the front of the Necchi machine. If your stitch length is set to 0, the sewing machine will not feed the fabric. Incorrect tension will cause poor stitch quality. You must consult you machine's user manual to know how to adjust the tension as the procedure differs among machines. Here is a general guide, however:

How to Adjust the Tension on Sewing Machine

https://www.youtube.com/watch?v=i-7bnb_6EBU Necchi

You can purchase a copy of the Necchi 537L manual as either a PDF download or a printed manual here: https://www.sewingpartsonline.com/instruction-manual-necchi-537-l.aspx? . There are several online guides for threading Necchi machines. These may help. However I don't know how different the leather and lace 537 is from other Necchi machines. The manual will have the threading diagrams.

I hope this helps .

Cindy Wells

Necchi 537-L Sandi, Machine made in Taiwan, My guess on age would be early 80's. Links below may help, first link one lady states buy her 537L from sears in 1982., other links are instruction and info.
Check the attached links,instruction and guides, Good luck
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Life With Lou Necchi 537L Sewing Machine

Necchi 536 FB 537 FA Sewing Machine Threading Diagram

http://www.sewingpartsonline.com/necchi-sewing-machine-instruction-manuals.aspx

There is no reverse button, it is a lever.The stitch length lever also reverses the feed dogs - when down, it runs forward - at zero, it does not feed at all and when moved up, it reverses the machine. Set your stitch length by loosening the thumbscrew on the vertically moving lever and sliding the plate into position while moving the lever up to the desired mark. Tighten the screw and move the lever down to sew - to reverse just move the lever up until it hits the stop to sew the same stitch length in reverse.

You can purchase a copy of the manual for $10 Here. As for valuation, this is a bit more tricky. Most Necchi's (at least the collectibles) are Italian made. The 537L was made in Japan. There isn't a great demand for this machine nor is it considered highly collectible. You'd be hard pressed to sell it for enough to buy a new machine. If you use sewing machine's I'd suggest keeping it. It was a solid machine. Otherwise, check craigslist and see what other working used machines are going for. I've seen the 537L go for $50.

There are several Necchi models (and loads more) threading guides shown here, it may well be you can find one very similar to help.
Threading Guides

I could not think of another way then free-motion sewing.
Drop the feed dogs, and put a spring loaded needle on.

This is not a commercial machine and will give you trouble trying to sew upholstery,especially if you use heavy upholstery thread. You will get loops on the bottom.
It will sew only short stitches,No matter how long the stitch length is, because it only feeds the fabric from the bottom and it will stick.
It should sew regular fabric with normal threads with no problems. There is a pressure adjustment on the top of this machine which may be where your problem is located.Look in your book for instructions.Also, make sure the feed dogs are in the highest position. I don't know how long you've had the machine but if it has been awhile,remove the needle plate and clean the lint out from between the feed dog teeth.
sewman7

You really need the instruction manual. You can order one at several places. I ordered mine through the Allyn Co., who is the present day Necchi distributer now in the U.S.A. You can order by calling them at 1-800-525-9987. They cost $10. & a moderate shipping & handling chargr. Their manuals are pretty informative on the machines, at least mine is.I bought two Necchi's used. One is a 537l & the other is a 525FA. It tells you how to clean & oil it & how often to do it & mine shows you how to set machine for the various results, & tells your stretch from the other stiches, etc.

Try this link to similar model
Best of..... www.bargainbox.com.au