The 18-5817 Sierra Solenoid is a replacement part designed specifically for Mercury outboard engines. This vertical post solenoid is manufactured by the reputable brand Sierra, ensuring quality and compatibility with the specified Mercury 89-96158 model. Ideal for boat enthusiasts looking to maintain or repair their outboard engine, this solenoid provides essential functionality for smooth operation on the water. Trust in the Sierra brand to deliver reliable marine engine parts for your boating needs.