Sierra 18-3635 Thermostat Kit for Mercury Marine Outboard Engines

The Sierra 18-3635 Thermostat Kit is a direct OEM replacement thermostat designed for Mercury Marine outboard engines. This essential cooling system component regulates engine temperature by controlling coolant flow, ensuring your outboard operates within the optimal temperature range for maximum performance and longevity.

Key Features:

• Direct replacement for Mercury Marine OEM part numbers
• Engineered specifically for Mercury 75-115 HP and 150 EFI outboard engines
• Includes O-ring seal for proper installation and leak-free operation
• Constructed from corrosion-resistant materials for marine environments
• Helps prevent engine overheating and maintains consistent operating temperature

What's Included:

• Thermostat
• O-ring gasket seal

Regular thermostat replacement is critical preventative maintenance for marine engines. A failed thermostat can cause engine overheating or prevent the engine from reaching proper operating temperature, leading to reduced performance and potential damage. Sierra Marine engine parts are manufactured to meet or exceed OEM specifications, providing reliable performance at a competitive value.