Mercury - Quicksilver Carburetor Fuel Filter Element Fuel System Component Fine Particle Protection 53336Q. Overview. Clean fuel means reliable power. The Mercury Marine 53336Q Quicksilver Carburetor Fuel Filter Element sits inside the carburetor where the fuel line connects, trapping dirt, moisture, and debris before they can reach your engine. Designed for MerCruiser 3.0L, 4.3L, 5.0L, and 5.7L sterndrive and inboard engines, this small but important filter keeps your fuel flow clean and steady