The Mercury Mariner 70 HP 3 Cylinder Outboard, produced between 1987 and 1993, represents a robust and reliable option for marine propulsion. This 3rd generation model features a water-cooled engine with CDI ignition and carburetion for efficient fuel delivery. Its engineering is designed for dependable performance, whether for recreational boating or commercial applications. The outboard is compatible with both tiller handle and remote steering systems, and offers available power trim for enhanced maneuverability and operational comfort. This Service Repair Workshop Manual provides comprehensive guidance for the Mercury Mariner 70 HP 3 Cylinder Outboard. It covers essential maintenance procedures, diagnostic techniques, and technical specifications necessary for keeping the engine in optimal condition. Detailed information on lubrication, ignition, and other critical systems is included to assist owners, mechanics, and technicians in performing repairs and routine upkeep. The manual is presented in English and is designed to facilitate effective troubleshooting and long-term engine reliability.