Quicksilver 99960 Heat Exchanger End Cap Gasket 4 Inch

The Quicksilver 99960 (also known as 27-99960) is a genuine OEM heat exchanger end cap gasket designed for Mercury MerCruiser stern drive engines. This 4-inch gasket provides a critical seal for the heat exchanger end cap, preventing coolant leaks and ensuring proper engine cooling system operation.

Key Features:

• Genuine Mercury Quicksilver OEM part for guaranteed fitment and quality
• 4-inch diameter heat exchanger end cap gasket
• Designed for MerCruiser 3.7L engines (models 470 and 485)
• Precision-manufactured to factory specifications
• Essential component for heat exchanger maintenance and rebuild

This gasket is a direct replacement for worn or damaged heat exchanger end cap gaskets and should be replaced whenever the heat exchanger is serviced. Cross-references to Sierra International part number 18-0389 and GLM 31830. Mercury Quicksilver parts are backed by a 1-year factory warranty against defects in materials and workmanship.