[C320-list] Fuel sender puzzler...

[David Birken]

The fuel tank on my C320 is not quite a cube but instead much deeper along the forward section than aft. The fuel level sender is positioned in the deeper part of the tank forward. I have just returned from a ~14 hour motor and filled up just before leaving. The gauge still reads full after returning and I ran pretty hard (3000 rpm) so I assume consumption was at least 1/2 gal per hour or more.

The sender was just replaced 2 years ago. Any ideas on how to calibrate this? Do I need to replace sender? How do I compensate for a trapazoid shaped tank? Anyone with experience on this?? I appreciate all thoughts.