Mercury - Water Separating Fuel Filter Quicksilver Filtration Series 10-Micron Element 8M0146203. Overview. If you spend enough Saturdays on the water, you learn pretty quickly that clean fuel is the quiet hero behind every smooth start and steady run. There is nothing flashy about a fuel filter, but when it does its job right, you feel the difference immediately. The engine fires without hesitation, the throttle responds the way it should, and you never catch that uneasy sputter that can ruin a