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Now I get it. Would have answered right away, but had to go to bed. What I ment was if you are running on aux, and the set runs out of fuel, the FL1 float will cut the gen set engine off, but it will not cut off the power to the aux pump. That was the first thing we would hear when we went out to check a set that ran dry. Electrical fuel pump.Guyfang in the "803a fuel level adjustment" thread, post # 43 this is what you advised me " When you tested the aux fuel pump, what position was the FL-1 and FL-2? If they were in the low/no fuel position, then the aux wont turn off."