Fuel Flow Meter/Gauge Questions

[stoney]

I have navman F3100 and i can not recommend them. It was very useful for 2 years and now the display has faded out. I contacted navman and they will not warranty it but will sell me another display for $200. They also got a bad batch of senders and had to replace that. Now I have this 4" square hole in the dashboard that is useless. I upgraded to a new chartplotter and will add the sender compatible with my chartplotter this winter. I found it very useful to see mpg.