A properly sealed oil system is essential for keeping an outboard engine running strong, and the Mercury Oil Plug Assembly (19-8M0112869) is built to do exactly that. Designed to prevent leaks and maintain consistent oil pressure, this OEM plug ensures that every drop of oil stays where it belongs-inside your engine, protecting vital components. If you're dealing with a worn or damaged plug, replacing it now can save you from bigger problems down the line.. Why This Oil Plug Matters:. Prevents Leaks - Keeps oil securely sealed, protecting internal engine parts from wear and contamination.. OEM Fit & Reliability - Designed for Mercury 4-Stroke outboards, ensuring an exact fit and long-lasting performance.. Built for Harsh Conditions - Made from durable materials that withstand constant exposure to heat, vibration, and saltwater.. Compatible With:. This oil plug assembly fits a range of Mercury outboards, including:. 175 HP - 300 HP (3.4L & 4.6L V6/V8 4-Stroke). 450 HP 4.6L V8 Racing Ver