Machine will not sew forward without backstitching

Question edited for a lot more clarity. FULL 'make model (what it is)'.
Question moved to model category.

Videos down below or take in for its yearly service, clean, lubrication and timing.
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Perhaps this will assist. There is a suggestion you may not have held down the reverse stitch button for the first 3 or four stitches but I can't make sense of that.

https://www.facebook.com/karen.m.sewing/videos/how-to-fix-the-backstitch-on-many-later-model-janomes-and-kenmores/125022392782746/

Try contacting Janome directly. However, companies do EOL (End of Line) products over time, so don't be surprised if there is not much available.

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Why do you need to know this?

Use the reverse button. That's what it is for. Sew forward and then push the button and sew in reverse.
Machine Darning Jeans Shirt

If you have a darning foot, you can use it (drop the feed dogs) and then you manually move the fabric around while stitching.

Learn How To Mend Clothes with Machine Darning

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Take a photo or the actual machine to a Janome Dealer and they should be able to point you in the right direction.

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The Elnita is the entry level model in the Air Electronic compact series, there is no reverse lever or button. Instead, you stop stitching, turn the stitch length dial back to zero, then keep turning into "negative" area, it should look like this "-- --- ---- -----" on the dial. Turn it back about half way into the negative area and you will get a reverse stitch of about 2.5 or so. Do your reversing stitches, then stop and turn the dial back to original forwards stitch location, and continue sewing.

Make sure you do not have the stitch selector dial set on buttonhole, this will make it sew in reverse.

First, ensure that you are pressing the reverse lever all the way in and holding it. A light touch won't work on this model.

There is a spring loaded cam in the feed system which can get gummed up when the lubricant gets old. It needs to be carefully taken apart, solvent cleaned, re-lubricated and reassembled. A knowledgeable repair person needs to perform this operation.

Found the problem (s) with Viking stuck on backstitch!!!

Two problems:

A: machine is "gummed-up" form old grease.
Solution: degrease machine with a high quality degreaser.. I used a spray electrical degreaser from an automotive store. Turn the machine up-side-down to preform this!
Then relubricate machine. Use a high quality sweing machine lubricant! Also lubricate the inner parts with a qigh quality "Sewing machine" oil.

B: Found that the return spring from foreward to backward was tired.
Soultion: Replace with slightly stronger spring from local hardware store.

If you need pictures, I took very detailed pictures of the reverse mechanism and "return to forward" spring.

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