I have a singer inspiration 4210 and I'm trying to change the presser foot, I followed the instructions but pressing down on the screww does not snap the foot in place, I have tried using various ammounst of force and the foot will not snap into place

SOURCE: I removed the presser foot

I just looked at your free manual on the www.singerco.com site and it looks a little complicated to do, Do you think that maybe downloading the manual and enlarging the diagrams on pages 10 & 11 may help you? If not, call Singer customer service, at 1-800-4singer and ask for some advice. Good luck

Testimonial: "This wasn't really helpful. I had already followed the instructions in the manual, but wasn't able to do the last step listed."

SOURCE: Top stitch looks good, bottom stitch is loopy

this is a common problem, don't worry it's easy to fix.  take the spool of thread off, remove the bobbin.  look for any stray thread pieces in or around the bobbin case, rethread the top of the machine and when you do, follow the threading guide precisely and ---here's the trick---make certain that the thread goes between the tension discs.

SOURCE: My machine is a Singer

Check your top tension. It sounds like it may be too loose or the bobbin tension may be way too tight. Most likely it is the top tension that is incorrect though. The TOP tension effects the bottom side of the stitch and the bottom tension effects the top. If the top tension isn't tight enough it won't draw the thread up through the top side taunt enough and the excess underneath makes a big loopy mess.

SOURCE: The presser foot lifter of my Singer 9432 has disconnected

Had the same problem.
Open the cover where the light bulb is.

Follow the presser foot rod up into the machine.

You will find a metal keeper with a set screw facing the now open end of the machine.

That set screw has most likely come loose.

Since the presser foot is spring loaded to the down position leave the presser foot raising lever in the down position.

With your flat bladed screwdriver, gently push the metal keeper to it's lowest position. If it does not go easy, loosen the metal keeper set screw a bit. Lefty loosey.

Tighten the set screw on the metal keeper. Righty tighty.

SOURCE: I have bought a Singer inspiration model 4220c and

Here you go:

http://www.singerco.com/pdf/4205_4210.pdf

Hope this helps, Owen