Quicksilver 863904T Engine Oil Cooler for 496 ZZ Big Block Marine Engines

The Quicksilver 863904T Engine Oil Cooler is an OEM-replacement oil cooling unit engineered specifically for Mercury MerCruiser 496 ZZ big block marine engines. Designed to maintain optimal engine oil temperatures under high-performance marine operating conditions, this cooler helps protect internal engine components from heat-related wear and degradation.

As a genuine Quicksilver part, the 863904T meets Mercury Marine's strict manufacturing tolerances and material specifications, ensuring a direct OEM-fit replacement with no modifications required. Keeping engine oil temperatures in check is critical in high-output marine applications, where sustained wide-open-throttle operation can rapidly elevate oil temps and reduce lubricant viscosity.

Key Features:

• OEM Quicksilver replacement engine oil cooler
• Designed specifically for Mercury MerCruiser 496 ZZ big block engines
• Helps maintain safe operating oil temperatures in demanding marine environments
• Direct-fit replacement — no modifications required
• Built to Mercury Marine's original design specifications and quality standards
• Resists corrosion in saltwater and freshwater marine environments

The Quicksilver 863904T is the correct factory replacement for maintaining the cooling integrity of your 496 ZZ engine's lubrication system. Always use genuine Quicksilver parts to ensure reliability and longevity of your Mercury MerCruiser powerplant.