02-02-2019, 05:19 PM
I know this is old thread but I have two on my 1988 3100. One for each fuel tank / each engine. Assuming you have two tanks or at least the boat did originally, then the low fuel lights are exactly as they say they are for each fuel tank. I know mine work as I have run it down and they come on, not at exact same time, but within a few miles of each other based on slightly different burn rates for each engine.

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