Now this thing is cool!
http://fox-marine.com/index.php?route=p ... ry&path=81I've been searching for a way to monitor fuel flow without buying a chartplotter. I was originally looking for a stand-alone gauge, however, Alexey at Yacht Devices (yachtd.com) referred me to Fox Marine.
The MEFI-3 gateway connects directly to the diagnostic connector of the ECM and via Bluetooth to my iPad. It gives RPM, fuel flow, air intake temp, manifold temp, coolant temp, total engine hours, engine hours since start, etc.
In a word, awesome!
$295 for the MEFI-3 Gateway and I spent another $75 or so for a Lowrance N2K starter kit. I think I could have wired the gateway directly to +12v and skipped the N2K (since I don't have any other N2K devices and the signal is via Bluetooth). Wired in to the ignition and added a dash switch to finish it off.