NAVICO Fuel Flow Transmitter

I really wanted to know the current fuel consumption of my 1993 Mercruiser V8 7.4-liter carbureted engine. I simply installed the flow meter according to the instructions, connected it to the N2K, and now I have reliable fuel consumption readings without calibration. I compared the displayed values at various rpm with information from various websites. I would say that the displayed values are quite accurate, with an accuracy of -5%. The display unit is a Veratron VMH 35.

Looks good so far. I'm looking forward to the session.

Hi there. Fast delivery gladly again, good advice.

I bought the flow meter from SVB in July 2024 and installed it in my fuel line after the fuel filter/water separator, as instructed in the instructions.
The NMEA connection to my Garmin UHD 92 sv plotter took a few attempts, but ultimately the sensor communicated flawlessly with the Garmin, and the data was displayed clearly by the Garmin.
In June 2025, the sensor suddenly stopped displaying anything. I checked the connections and connected a different sensor to the NMEA cable, which was immediately recognized by the Garmin. That can't be the problem. The sensor was removed, and somehow it looked as if parts of the sensor's measuring line were missing.
Complaint 1 was sent to SVB on June 15, 2025.
No response from SVB.
Complaint 2 was sent to SVB on June 24, 2025.
Again, no response from SVB. Today is July 14, 2025.
Apparently, SVB likes to brush off inconvenient customer complaints.

I was able to breathe new life into the sensor. Although there were no visible residues inside, patient treatment of the sensor tube by running isopropanol and acetone through it didn't produce any visible change, but the sensor is now providing readings on the Garmin again if you gently blow through it.

I won't be installing the sensor in the fuel line again because shortly after the sensor gave up, I had major problems with an overly rich mixture, which led to the outboard's lambda sensor failing. I don't need that again. Thanks, Navico, for this rubbish, and thanks to SVB for not addressing my complaint in such a frustrating way.