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Author Topic:   NAVMAN Fuel Flow Gauge
CaptCharley posted 08-31-2007 09:17 AM ET (US)   Profile for CaptCharley   Send Email to CaptCharley  
I have a Navman Fuel Flow [gauge] that connects to my Navman Tracker 5500 and it has worked flawlessly for about four years now. Last weekend it began to act up. I suspect that it has a spec of something and today I'm going to squirt it with a can of compressed air. If that doesn't work, has anyone else experienced and resolved a similar problem?

Incidentally, to calibrate it and solve the "known fuel amount" is really quite simple. Start with a full, topped off tank, run her for 25 gallons or so and then fill 'er again. This gives you the actual use from a "known amount" ie, full. Follow the manual from there.

In addition to knowing the fuel remaining, I found the real value, especially with the price we are all paying for fuel, is knowing the exact flow (consumption) at a given RPM. Perform this test on a dead calm sea and you will know the mpg at a given RPM. This is the same way that Boating Mag does it for their boat tests.

Hope this helps. Chas

myakka posted 08-31-2007 09:19 PM ET (US)     Profile for myakka  Send Email to myakka     
The Navman fuel transducers wear out after a while and need to be replaced. I want to say 1000 gallons but I'm not sure. I do remember the Navman tech saying only use a light breath to test the fuel transducer.
Peter posted 09-01-2007 08:14 PM ET (US)     Profile for Peter  Send Email to Peter     
I have put far far more than 1000 gallons through two Navman transducers and they are both still working fine.
myakka posted 09-01-2007 10:59 PM ET (US)     Profile for myakka  Send Email to myakka     
I thought it was a small amount of fuel when I talked to them. I had one fail right out of the box. Thats when I contacted Navman (if I remember correctly, in Massachusetts) The second one has worked flawlessly.

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