Seal It Right, Keep It Tight
A reliable seal is the difference between smooth sailing and unexpected downtime. The Mercury Quad Ring (25-20295) is designed to keep cooling systems and critical engine components leak-free, ensuring your marine engine runs at peak efficiency. Unlike standard O-rings, this quad-ring design provides superior sealing, reducing wear and extending the life of your engine’s vital systems.
Built for Performance
- Engineered with high-quality materials to withstand extreme temperatures, pressure, and exposure to fuel and coolant.
- Quad-ring profile offers a more secure seal than traditional O-rings, minimizing the risk of leaks in key areas.
- Designed for exact fitment in select Mercury and MerCruiser engine models, eliminating guesswork during installation.
Where It’s Used
- Essential for cooling system maintenance, keeping fluid pathways properly sealed.
- Ideal for engine overhauls, ensuring all seals are fresh and functioning at their best.
- Compatible with multiple Mercury inboard and sterndrive models, including 8.2L Inboard EC, 520 EFI, and 700 SCi.
When it comes to engine maintenance, small components like this make a big impact. If your system shows signs of wear, replacing the quad ring can help prevent costly repairs and keep your engine running strong.
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.








