[IC27A] Fuel gauge reads close to full

[Michael]

I've run the engine for approximately 20 hours and my gauge still reads close 
to full. The gauge goes down to "empty" when the key is disengaged and to 
almost "full" when I turn the key. Is it possible that I would be anywhere near 
full after approx 20 hours of use? Is there another way to tell how much fuel 
is in the tank without filling it to the top? Any thoughts or suggestions would 
be appreciated. Thanks