The bobin won't thread through and doesn't catch in the material with the thread from the needle. I've asked a couple people and they informed me it was due to the needle size. But I have

Yes.

Take it to a local sewing machine repair and sales business for repair.

Best and easiest is to ask the people at the store where you bought it!

try changing the needle
rethread the machine top & bobbin
make sure to use every thread guide
make sure the bobbin is not over wound
make sure the bobbin is turned the right way in the bobbin case
make sure the bobbin is not warped or damaged
if you've done all these things then it's also possible that the machine
is out of time & needs to be checked at a repair shop

Please take your machine, along with some scraps of the material you are using to your service center. I believe you need to have your machine timed.

Be sure not to use Singer Needles. They are longer than standard needles. Don't know if this helps, but I did this once on my Huskystar 207 and that is what happened. It also damaged the bobbin thread.

Fairleigh

Check the model number of the machine. White sewing machine manuals are available from Singer at http://www.singerco.com/accessories/instruction-manuals . Enter the model number and click Search.

The White Sew E-Z model W338 manual is available here: http://www.singerco.com/uploads/download/705_white-338-x.pdf .

Unlike some machines this one doesn't really need the bobbin threaded. Place the bobbin in the bobbin holder and leave about 5" of thread extended out from the bobbin holder. With the bobbin compartment still open, lower the presser foot and turn the handwheel to move the threaded needle through the stitch cycle. (I find holding the threads helps; normally, you'll feel them pulling under your fingers.) When the needle has returned to the top of the path, lift the presser foot. Then pull both threads around to the front (the bobbin thread should wrap around the top thread). Then move the threads to the back of the presser foot.

If the needle isn't catching the bobbin thread, first try a new needle (bent or dull needles don't always function properly). Next check the bobbin holder for nicks or other damage. There is a small hook on the bobbin holder that should be where the top and bottom threads intertwine. Under rare circumstances, you will find that the bobbin tension of the bobbin holder is misadjusted. This can interfere with the bobbin thread twisting properly. There is a little set screw that allows you can tighten or loosen the bobbin tension as needed. Adjusting the screw is to be avoided when possible and done in small increments (1/8 turn) if needed. It's easy to strip the threads for the set screw and end up needing to replace the bobbin holder.

I hope this helps.

Cindy Wells

It sounds like your problem is as simple as either a bent needle or a bobbin casing that is inserted improperly. First, change your needle being mindful of the type of fabric (and thread) you are using (e.g. Size 11 ballpoint for a light knit or a size 18 jeans needle for denim). Make sure that the bobbin casing is set in correctly, and that the bobbin goes in the correct way. (i.e. Counter-clockwise for a drop-in style bobbin). This should solve your issue. Happy sewing!

use larger needle, check bobin thread, bobin should go one way, if it bunches up switch dirrection the bobin turns

Try changing your needle.