Mercury - Quicksilver Water-Separating Fuel Filter Replacement Element 802893Q01. Overview. Keep your engine running clean and powerful with the Mercury Marine 802893Q01 Quicksilver Water-Separating Fuel Filter. This replacement filter is built to trap water, dirt, and debris before they can reach your fuel system, preventing corrosion and performance loss. Designed for Mercury and Mariner outboards and MerCruiser sterndrive and inboard engines, it's made to OEM specs for dependable filtration a