Open-toe darning foot skips all stitches....help!

SOURCE: tension

Check your tension disks, with your presser foot up, and the tension dial on zero. Sometimes a piece of cotton breaks off between the tension disks and then prevents the disks to work properly. Also make sure when you thread the machine, the thread does go through the disks and over the take up lever. After you threaded the machine, before putting the thread through the eye of the needle, lower the presser foot and while pulling on the thread with your left hand, increase the tension with your right hand. Do it slowly and you should feel in difference in tension. If this is the case, your machine should work fine.

SOURCE: free motion

If the machine works on regular stitching and only messes up on free motion ,the most likely problem is the presser foot has not been lowered. Get everything ready to sew, lower the presser foot lever and pull on the upper thread near the take up lever. It should have tension on it. Raise the foot and try again, it should not have tension on it . If this is what you get, lower the presser foot lever and try it again.
sewman7

SOURCE: lost manual, power cord, presser foot lever for Kenmore sewing m.

I think #39 on this link is the presser foot lever.
http://www.searspartsdirect.com/partsdirect/getSubComp.pd?modelNumber=3851249180&productCategoryId=1220000&brandId=0582&modelName=SEWING-MACHINE-HEAD&diagramPageId=00004&componentDescription=PRESSER%20BAR%20ASSEMBLY&documentId=00032216&backToLink=Return%20to%20Sub%20Components%20list

#13 on this link is the instruction manual.
http://www.searspartsdirect.com/partsdirect/getSubComp.pd?modelNumber=3851249180&productCategoryId=1220000&brandId=0582&modelName=SEWING-MACHINE-HEAD&diagramPageId=00009&componentDescription=ATTACHMENT%20PARTS&documentId=00032216&backToLink=Return%20to%20Sub%20Components%20list

If you're looking for the foot control, that is #16 on the first link.

SOURCE: The presser foot came off Brothers sewing machine

position the foot under the shaft making sure the horizontal pin on the foot is in line with the horizontal groove on the end of presser foot fitting on the shaft. Lower the pressor foot arm and it should snap right on. If not, press it up manually. the directions should be in your manual. If you don't have your manual, you can get it online at www.brother-usa.com

SOURCE: How do I do a stretch stitch?

The bes way to hem a t-shirt on a household machine is to use a double needle, straight stitch. You will see two straight stitches on top and zig zag on the back. Just make sure the zig zag catched the top of the hem.