Hi I have a Singer Touch-Tronic 2010 memory machine the onley outher number on it is 621 B I found a parts manual (go figure) but I can find no user manual and I have no ideal how to thread it orwind a bobbin can you help? Thank You

go to singer .com --singer forums or online search

Singer lists 2 machines with the 2010 model number here: https://www.singer.com/support . Do you have the Superb or the Touch Tronic? The manual for the Superb 2010 is currently here: https://www.singer.com/sites/default/files/product_manual/SINGER%202010%20SUPERB%20Sewing%20Machine%20_English.pdf (page 13, 18 of the PDF). The manual for the Touch Tronic is here: https://www.singer.com/sites/default/files/product_manual/SINGER%202010%20TOUCH%20TRONIC%20Sewing%20Machine.pdf (page 28, page 30 of the PDF). For both machines when threading the top thread, the take-up lever must be at the highest position and the presser foot should be up. Work from right to left from the thread spool with the appropriate spool holder in place. Put the thread through the upper guide or guide post. Then bring it around the thread guide and under the pre-tension spring (for the Superb) or under the flange and around the cylinder (for the Touch Tronic). Bring the thread down and into the tension disc. (On the Touch Tronic, keep the thread on the right side of the tension disc.) Bring the thread all the way down the right hand channel and then up the left channel. (On the Superb, you go around the check spring holder.) Bring the thread up to the take-up lever. On the Superb, bring the thread through the slotted eye in the lever. On the Touch Tronic, bring the thread to the back of the lever and then to the left of the take-up lever. Bring the thread into the slit by pulling the thread down and towards you. Run the thread down from the take-up lever and into the thread guide above the needle. On the Superb, there are two thread guides. Get the thread into both the horizontal guide and the one just above the needle. On the Touch Tronic, getting the thread into the thread guide takes holding your left finger at the bottom of the left channel. Then guide the thread into the thread guide from the right. Thread the eye of the needle from front to back. Make sure the slot in the needle is facing forward.

I hope this helps. See the appropriate manual for the bobbin threading. Other threading diagrams may be available on line but choosing the correct one depends on the machine.

Cindy Wells

Here:

http://homeappliance.manualsonline.com/manuals/mfg/singer/2010.html

I am sending you the link to the manual. Your machine is the last one, click download on the right. The information you need is on page 32. Product Manual Results

I’m happy to help further over the phone at https://www.6ya.com/expert/adrienne_b03fb46fc6334991

If you have the Singer 2010, here is an instruction manual:

Product Manual Results

Perhaps this will help with needle selection:
Machine Needles

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The part number may answer your question:

Bobbins 10pk Singer 181551

The bobbins I pulled up for JoAnn's site, does NOT say the bobbin fits your model.

Singer Touch Tronic 2010 Owner Manual Page 5

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the noise could be from the needle /hook timing, or bobbin carrier
take it to a service center for a service and to find out the worn/ loose parts

Here is a link to the owner's manual.
http://www.manualslib.com/manual/154331/Singer-Touch-Tronic-2010.html

Was this running ok, the poof?
There might be a reverse option on one of the selections switches.
If it has sat for a while, it might need servicing; gummed up inside.

You may download a copy of the manual at http://www.singerco.com/uploads/download/432_touchtronic.pdf

I can't find any free downloads for a 2010, but I did find one for a touchtronic 2000. When the model numbers are close, very often the manuals apply to both machines pretty well. It should at least give you some info. Go to http://safemanuals.com/user-guide-instructions-owner-manual/SINGER/TOUCH-TRONIC%202000-_E. You'll need to give them a rating of your machine, but that's all. This site and it's downloads have been checked for viruses and such, and it is a safe site. It doesn't ask you for, nor does it take any personal information.

If you are willing to pay something for the manual, leave me a comment back. I know of a lot of sites that have manuals available for a charge, and I can quickly search those and get back to you as to which ones have your manual and an idea of the costs. The ones you can download from are, obviously, less expensive than the ones you get mailed a hard copy from.