This workshop service manual covers the Mercury Mariner outboard engine, a robust and reliable power unit designed for a variety of marine applications. Engineered for performance and durability, the Mariner series is known for its consistent operation and efficient power delivery, making it a trusted choice for boaters. This manual provides comprehensive information to ensure optimal function and longevity of your Mercury Mariner engine. The purpose of this manual is to serve as a definitive guide for maintaining and repairing your Mercury Mariner outboard engine. It details essential procedures, technical specifications, and troubleshooting steps, assuming a solid understanding of general automotive practices. From routine maintenance like lubrication and spark plug replacement to more complex diagnostics and adjustments, this document equips owners and technicians with the knowledge required to keep the engine running at peak performance and safety standards.