Compatibility: This outboard thermostat is fit for Mercury Mariner 200 225 250 HP 3.0L DFI EFI Motors
Replace Part Number: for Mercury 885599003, 885599004, 8855991, 8M0057307; for Sierra 18-3535,18-3675
Performance: Outboard thermostat helps maintain optimal engine temperature for efficient operation and extended engine life
Durable structure: The outboard thermostat is made of high-quality materials, which are corrosion-resistant and rust proof, and can adapt to harsh marine environments
Peace of Mind Service: If for any reason you are not completely satisfied with this 18-3535 outboard thermostat, please contact us and we will give you a satisfactory answer