fuel gauges peg under empty line.

Jan 23, 2009
742
So Calif Offshore Islands
Boat Info
Furuno Navnet radar/chartplotter, fish finder, bait tank, 85 Gal main fuel tank, 75gal aux tank.
Engines
Merc 8.1 Mag 375 HP / Bravo III,4 blade prop. 28mph at 3200rpm.
Two new fuel tanks, senders, and gauges.
With ignition on. the gauges move under the empty mark.
The tanks sat empty for a year before filling, and Sea trial.

Could the sending units get damage or stick by not being
submersed in fuel for a long period of time??

Purple wire has 14v at gauges.
Jump pink sender wire to ground. fuel gauge will read full.
 
No responses ??
Maybe the new gauges and senders are incompatible?
Wrong ohms.
 

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