I recently bought A kenmore 10 sewing machine in A cabinet and can not get it of of ziz zag stitch it did not have A manual

Perhaps this will help:

Morse 300 Sewing Machine Threading Diagram

Morse Pushbutton ZigZag Sewing Machine Threading Diagram

Morse Sewing Machine Instruction Manuals and Repair Manuals

...

I was able to find this photo on the internet. If your machine looks something like this
http://www.worthpoint.com/worthopedia/strong-vintage-kenmore-sewing-machine

Kenmore sewing machine in cabinet model 117 305 Collectors Weekly

Photo gallery Stitch in Time Must Liquidate EstateSales org

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=25&ved=0ahUKEwjXk5Gy3ZTMAhXhyIMKHaaSA_w4FBAWCEEwBA&url=http%3A%2F%2Fwww.searsarchives.com%2Fhistory%2Ffiles%2Fsewing_id.pdf&usg=AFQjCNEavJEwfhMVnix2pT0kwej_RSZ33A&cad=rja

then it most likely has zig-zag. There are a lot of dials and levers on this machine. Most straight stitch machines have only one or two. One dial/lever with numbers from 0-4 or 5 would be the stitch length. The other dial/lever with numbers from 0-4 or 5 would be stitch width, which would make a zig-zag stitch.

..

Mustang, RE POST your question with year,make, model #, and complete question to help you better.
Show your appreciation, press the helpful button and follow me on fixya for more tips and info

Try unpluging it from the power. It may need to resent . Try a basic straght stitch and see what happens. Then go back to your Ziz zag stitch.

http://www.youtube.com/watch?v=fzhR6PNlI4E

The ziz-zag wdith regulartor might be switched off. try turning the knob. I hope this helps :)

the gear or cam inside the sewing machine could be worn or broken, it would be a good idea to have the sewing machine checked at a repair shop.

Check the position of the Button Hole Stitch adjuster that is directly under the stitch length control. It looks like a flat head screw and should be straight up and down for normal sewing.

I would try a metal bobbin, SA 156 or a Singer 15j. The SA 156 metal bobbins can be bought really cheap on ebay for $8.99 free shipping and there are 20 in the package. My 3116 sometimes will act up with the plastic bobbins and this cleared it up for me. Hope this helps you. You may be able to find the bobbins local because it is the same one they use in Brother machines but they will cost you more. Good luck

If you have a flatbed machine they are normally all 16 inches long and will fit into any sewing machine cabinet, if you have a free arm machine it will mean a tailor made cabinet for the model you have which is normally made by Horn Cabinets but they are vfery expensive, you have not said what is exactly happenning to your machine when you select the stitches.