Sierra 18-3631 Thermostat with Housing for Mercury Verado Outboard

The Sierra 18-3631 Thermostat with Housing is a premium aftermarket replacement designed specifically for Mercury Verado outboard engines ranging from 135 to 300 horsepower. This complete assembly includes both the thermostat and housing unit for convenient, leak-free installation.

Key Features:

• Opens at 160°F for precise engine temperature regulation
• Complete assembly with pre-installed thermostat and housing
• Engineered to meet or exceed OEM specifications
• Constructed from durable plastic and steel materials for long-lasting marine use
• Direct replacement for Mercury Marine part number 892864T04 and 8M0174561
• Designed to withstand harsh marine environments

Sierra is a trusted name in the marine aftermarket industry with over 50 years of experience providing high-quality engine and drive parts. This thermostat assembly helps maintain optimal engine operating temperature, preventing overheating and ensuring reliable performance on the water. The complete housing design eliminates the need to reuse old components, ensuring proper sealing and coolant flow.