This manual covers the Mercury Mariner outboard engine series, specifically focusing on the 8 HP 4-stroke models. Engineered for reliability and performance, these water-cooled engines feature a CDI ignition system and carburetor fuel delivery, making them suitable for a variety of marine applications. The Mariner series is known for its robust construction and user-friendly operation, offering options for remote or tiller throttle control and electric or manual recoil starting systems. This manual provides comprehensive information for maintaining and operating these dependable outboard engines. The purpose of this Factory Service Repair Manual is to provide detailed guidance for the maintenance, repair, and troubleshooting of the Mercury Mariner 8 HP outboard engines. It includes essential technical specifications, lubrication requirements, recommended fuel types, and service procedures for components such as the ignition and fuel systems. With hundreds of pages of detailed instructions and diagrams in English, this manual is an indispensable resource for owners, technicians, and mechanics seeking to ensure the optimal performance and longevity of their Mercury Mariner outboard.