Mercury - Oil Filter Filtration System Marine-Grade Construction 883702K. Overview. There's a certain peace you feel when your engine settles into that low, confident rumble - the kind that tells you everything beneath the deck is clean, protected, and working exactly as it should. A dependable oil filter plays a quiet but vital role in that moment. It keeps the heart of your boat running smooth, mile after mile, no matter where the day takes you.. This Mercury Marine part brings that sense of t