Mercury - Quicksilver Fuel Filter Fuel System Component Filter Assembly with Gaskets 49088Q2. Overview. Clean fuel is key to a strong-running engine, and the Mercury Marine 49088Q2 Quicksilver Fuel Filter helps make sure your MerCruiser gets exactly that. Built for 4- and 6-cylinder MerCruiser gasoline engines with a Rochester 2-barrel carburetor and Carter fuel pump, this filter traps water and contaminants before they can reach your carb or injectors. It's easy to install with basic tools and