[tlb888]

tsubaki,

I have one and use it soley for fuel management. It works OK but does not register sometimes when idling and I knew that going in. Other than that it is more of a piece of mind for me over the digital yamaha guage letting me know what consumption is. Without a GPS you cannot read GPM only fuel used, fuel remaining, and GPH. Let me know if you have any problems, Lowrance customer service can be very slow to respond.

Also there a couple of guys on THT that are experts on these and the NAVMAN guages, just ask on the electronics forum and they will respond.