Inacurate Flo-Scans

[Steamboat Willie]

I have a 1997 325 aft cabin with two 350 Crusaders. Flo-Scans were installed somewhere along the way by a previous owner. The starboard seems to work, but it jumps around a bit at times, and the total fuel used is way low. The port needle never comes off the peg, except to bounce around every now and then. Total fuel used on that side shows almost nothing.
Anybody recommend where I should start looking for this problem?

[waybomb]

Flo-Scan seems to be a good outfit - give their service department a call. There may be some simple checks to determine if it is the senders or the instrument.
But maybe the first thing to do would be to find a manual and double check the install. And the wiring connections, especially at the senders.