Fuel usage problem

Hi

I'm having trouble with my e127 not reading my NMEA2000 Offshore systems fuel level tank sender. I know the MFD sees it but I can't select its PGN number. The fuel manager seems to default to PGN127497. The fuel level sender is transmitting on PGN127505. It seems crazy to me that Raymarine defaults to only 1 PGN when there are others valid options within the industry. How do I get this to work, it was a very expensive sender?

Thanks

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