This manual covers the Mercury Mariner 8 HP 4-Stroke Outboard Motor, serial number range 0H000058 and above. This robust outboard motor is designed for reliable performance on the water, featuring a 4-stroke engine configuration that ensures efficient operation and reduced emissions. Its water-cooled system and gasoline fuel system are engineered for durability and consistent power output, making it suitable for a variety of boating applications. The outboard drive system with forward, neutral, and reverse gear selection offers versatile control for navigating different water conditions. The purpose of this Service Repair Manual is to provide comprehensive guidance for maintaining and repairing your Mercury Mariner 8 HP 4-Stroke Outboard Motor. It includes detailed information on scheduled maintenance, fluid capacities and recommendations, and specific maintenance procedures for the ignition, fuel, and cooling systems. Furthermore, the manual offers diagnostic procedures and a troubleshooting guide to help identify and resolve potential issues. This resource is essential for owners, mechanics, and technicians to ensure the longevity and optimal performance of the outboard motor.