Mercury - Water Separating Fuel Filter Marine Filtration Series High-Efficiency Element 8M0154765. Overview. Every boater has that one part they quietly rely on more than they ever talk about. For many of us, it's the fuel filter. When it's doing its job, you barely think about it - your engine fires up cleanly, settles into a smooth idle, and carries you across open water without a hiccup. That steady confidence is exactly what the Quicksilver 8M0154765 Water Separating Fuel Filter delivers day