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I installed one that communicates with my Garmin and displays all the data if I select it. It was a nightmare of confusing NMEA wiring, but I got it.....eventually.
The good thing is it knows how far I traveled by GPS so I get MPG.
A stand system alone only gives GPH and total fuel, unless there is communication with a GPS you have to calculate the rest. It sounds like the one you talking about is NMEA linked.
Consider this:
In my system, there is a bit of error between the system and actual fuel burned. My ETEC burns so little fuel at trolling speed or idle it can't detect it too well (I troll a lot and never shut the engine off during a fishing day). I also have a fuel gauge that I rely on. When the gauge reads close to empty, that is when I fill again. The management system says I still have more fuel than actual.
So I'm not sure if the one you are considering can do all that.. I guess do plenty of research. The guys on THT (boat electronics) are real knowledgeable.
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