Mercury - Quicksilver Oil Filter FourStroke Outboard Filtration Anti-Drainback Canister 8M0162832. Overview. Small outboards work harder than most people give them credit for. Whether you're trolling slowly along a weed line, running a tender in tight channels or cruising the shoreline at sunset, your engine is constantly cycling, cooling and carrying the load. That's why clean, well-filtered oil is so important - it's the lifeblood that keeps these compact motors feeling strong and steady. The