Product Overview
Thermostat Service Kit

Keep your engine running cool and efficient with the Sierra Thermostat Service Kit. Designed for demanding marine environments, this kit ensures optimal engine temperature regulation, preventing overheating and extending the life of your Mercruiser, OMC, or Volvo Penta engine. Don't let a faulty thermostat ruin your day on the water – invest in reliable performance and peace of mind.
Key Features
- Compatible with Popular Engines: Fits Mercruiser 120, 140, 165, 170, 180, 181, 190, and 225 HP, as well as OMC and Volvo Penta engines, covering a range of 2.5L, 3.0L, and 3.7L engine sizes.
- Premium Quality Construction: Built by JSProxam, known for their high-quality marine components, this kit ensures long-lasting durability and reliable performance.
- Prevents Overheating: Maintains the correct operating temperature, preventing engine damage caused by overheating.
- Improves Fuel Efficiency: A properly functioning thermostat contributes to optimal fuel combustion, saving you money at the pump.
- Easy Installation: Designed for straightforward installation, minimizing downtime and getting you back on the water quickly.
- Comprehensive Kit: Contains all the necessary components for a complete thermostat service, eliminating the need for multiple purchases.
- Cross-References Multiple Part Numbers: Covers a wide range of OEM part numbers (8M0073435, 861676a1, 18-7282, 42725a3, 509407, 3854858, 9-35422) for easy identification and replacement.
- Backed by Sierra's Quality Assurance: Ensures you're receiving a dependable product designed to meet the rigorous demands of the marine environment.
Specifications
The Captain's Take
As a captain, I know that a reliable engine is crucial. The Sierra Thermostat Service Kit offers the peace of mind I need, knowing my engine is running at the optimal temperature. It's a small investment that provides big returns in terms of performance and longevity. I highly recommend this kit to any boater looking for a top-quality thermostat solution.