DF200 & LMF400 Fuel Burn Issue

[jpearce]

I have a 2007 DF200 and Lowrance LMF400 Gauges. Boat is a 22' blazer bay.

I have been unable to get realistic fuel burn numbers from my gauges. My gauge shows +/-10 GPH at idle and +/-40 GPH at 3000rpm. As such, my fuel remaining value is way off.

As an example, during a typicall fishing day my gauge will indicate that I have burned 30 gallons. But, when i refill my tank i can usually only get 8-10 gallons in (60 gal capacity tank).

Have tried recalibrating without any improvement. Have taken my rig back to the dealer, but he has been unable to help.

All other gauge functions (tach, speed, voltage, trim indicator, etc. ) work fine.

Has anyone with a similar motor and gauge setup had these issues.

Any thoughts on how to correct?

Thanks in advance!

[billfish33]

Not sure if this is the same issue as your having ?
but it's good reading none the less !

Fuel Management Problems with a Suzuki DF300 (Lowrnacenet) - The Hull Truth

[Fishbones]

I have the same problem too, anyone know how to deal with the issue?