<div data-store-description="v1"> <p>Water Pump with Impeller &amp; Key for Mercury Mariner 4hp 5hp 1990-1999. Supplied product details follow.</p> <h3>Specifications and fitment</h3> </div> <p>Includes: - Water Pump Impeller w/ Key</p> <p>Fits Models: - Mercury Mariner</p> <p>Model Years: - 1990–1999</p> <p>Submodels: - 4hp, 5hp</p> <p>Engine Options: - 4-Stroke, 2-Stroke (specific engine codes not provided)</p> <p>Description: This water pump impeller is designed for Mercury Mariner outboard motors with 4hp and 5hp engines produced between 1990 and 1999. It includes a key for easy installation and ensures optimal water flow for cooling the engine, preventing overheating and maintaining performance.</p> <p>Features: - Direct replacement for Mercury Mariner 4hp and 5hp models - Includes installation key for convenience - Ensures efficient cooling and engine protection - Durable construction for long-lasting performance - Easy to install with standard tools</p> <p>Part Number: 18-3098 CEF 500377</p>