am i missing a part?

now that i have made space in the barn for the old girl, i finally am doing some repair work. i took the fuel gauge out because the gasket leaks and it always says 1/4 tank. i can handle the leak, but i'm not sure if i'm missing a piece or not. i see how it goes together, i see how the rising and lowering of the float turns the shaft that goes into the guage, but as that shaft turns, nothing happens to the guage. should there be another piece between that shaft and the guage? is something broken off the shaft or guage? 

thanks for the picture help. i'm sure i could have poked around long enough to get it right after 5 or 6 attempts....but i knew a link would work too.

Skip - I don't know for sure 100% so I may get corrected here but I thought the needle inside was not magnetized but the "U" part was.  I'm not sure if each size of the "U" had opposite polarity or not.   Can you take another magnet and get the needle to turn by placing it to the back of gauge. 

As far as re-magnetizing, I thought you could do that if you placed the part next to a very strong magnetic source.   Here's one link from doing a google search.  Maybe others that have done this to a gas gauge can chime in.

http://www.ehow.com/how_4878360_old-magnets-using-neodymium-magnets.html

Mike