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I'm look to buy a smart fuel gauge the ones that tell to the gph while you are running. Can someone make a recomendation. Reason being I thought I had a 100 gallon fuel tank (1978 scepter) My gauge was flashing on empty (2000)225 HP Yammha)and I only took 75 gallons. I'm confused should my gauge be flashing on empty when I have 25 gallons left in the tank ? any thoughts on this
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I have the Faria Fuel Monitor. It seems to be a great thing. Easy to install and keeps track of more fuel things than I care about. I use it in addition to my fuel gauge.
As far as your fuel gauge, if it is not the first time you ran the tank to that level I would say the sender is dirty. My understanding is the sender runs on resistance. If it became dirty there would be more resistance and bad readings. Alcohol in the fuel might be the cause of moisture and corrosion on the sending unit.