This Service Repair Manual covers Mercury Marine Mariner outboard engines manufactured between 2000 and 2005. These 4-stroke, 90 HP, water-cooled engines are known for their reliable performance and efficient operation, making them a popular choice for a variety of marine applications. The Mariner series is engineered for durability and ease of use, providing boaters with a dependable power source for their vessels. This comprehensive manual provides detailed information essential for the maintenance, diagnosis, and repair of your Mercury Marine Mariner outboard. It includes step-by-step procedures for routine servicing, troubleshooting common issues, and understanding technical specifications. By following the guidelines within this manual, owners and technicians can ensure the optimal performance, longevity, and safety of their engine.