THERMOSTAT KIT

Keep your engine at the optimal temperature with this complete thermostat kit, designed for dependable cooling system maintenance using premium Sierra components. This kit includes everything required for a full thermostat replacement, helping protect your engine from overheating and ensuring peak performance.

With all necessary seals and gaskets provided, installation is straightforward for both DIY boaters and professional technicians. Built from corrosion-resistant materials, these components are engineered to withstand harsh saltwater conditions and offer long-lasting durability.

• Includes Sierra 18-2553 thermostat (140°F rating) for effective heat regulation
• Comes with a complete Sierra 18-3649 gasket set for secure sealing
• Sierra 18-0398 O-ring kit included to prevent fluid leaks
• All essential parts provided for a comprehensive installation
• Corrosion-resistant construction ideal for marine environments
• Direct replacement quality at an accessible price
• Restores cooling system to factory specifications for consistent engine performance and extended engine life