A reliable engine is all about precision, and even the smallest parts make a difference. The Mercury Marine O-Ring 25-825057004 is a key component in keeping your carburetor system sealed tight, preventing leaks that can throw off your fuel mixture and impact performance. If your engine isn’t running as smoothly as it should, a worn O-ring might be the culprit.

Built to withstand fuel, oil, and temperature extremes, this durable seal is designed specifically for Mercury and Mariner outboards, particularly 8-20 HP models. Its snug fit ensures an airtight seal in the carburetor assembly, preventing unwanted air or fuel leaks that could lead to rough idling or performance issues.

What Makes It Essential:

• Seals Fuel & Air Pathways – Prevents leaks that could disrupt engine efficiency.
• Tough & Long-Lasting – Resists wear from fuel exposure and fluctuating temperatures.
• Precision Fit – OEM quality ensures it works seamlessly with compatible Mercury engines.

Replacing worn or damaged O-rings is a simple yet crucial step in keeping your engine running at peak performance. Whether you're doing routine maintenance or troubleshooting a minor issue, having a few of these on hand can save time and hassle on the water.