Well, I checked and and sprockets/gears that the timing belt is on was frozen but I was able to get them turning again and I can see that when I turn it the needle-hook turns!!! So it looks like all I need is the black gear which I will order right away AND I'll try to talk someone who is mechanical to install it. I know, I know, it's simple for you but it scares me to just read the instructions. Guess I shouldn't be since I've only spent $5 on it. What could go wrong?