Thermostat Gasket 887978 is a durable O-ring style seal designed for a wide range of Mercury FourStroke outboards, including the advanced V10 Verado and SeaPro models. Manufactured from long-lasting materials, it resists damage from intense heat and vibration. A properly sealed thermostat housing is essential for maintaining cooling system pressure and protecting your engine internals.
- Fits Mercury 40-60hp EFI, V10 Verado/SeaPro, and 400R outboards
- O-ring style design for newer 1-piece thermostat housings
- Durable material resists degradation from heat and engine vibration
- Produced to Mercury Marine original equipment manufacturer specifications
- Essential component for routine cooling system service
