COOLING COVER GASKET 27-96656M

Function and technical context

This cooling cap gasket is a critical component in the cooling circuit of Mercury and Yamaha outboard engines. Its main function is to ensure a tight seal between the cooling cap and the engine block, preventing coolant from escaping and preventing seawater from entering the system. Proper operation of this gasket is essential to maintain the integrity of the cooling water circulation, which protects the engine from overheating and prolongs the life of its internal components. A failure in this gasket can cause coolant leaks, salt water entering the circuit and severe engine damage.

When to replace this part?

Cooling cap gaskets should be inspected regularly during seasonal maintenance, especially on saltwater vessels where the corrosive environment accelerates their degradation. If you notice coolant leaks around the cap, rust or corrosion stains in the sealing area, or if the engine shows a tendency to overheat without apparent cause in the circulation system, it is an indication that the gasket has lost its sealing properties and should be replaced. Preventive replacement at each major maintenance check avoids unforeseen breakdowns during navigation and costly repairs in port.

Engine Compatibility Table

Mercury/MerCruiser

Equivalent manufacturer part numbers