This comprehensive repair manual covers Mercury-Mariner outboard engines produced between 1965 and 2000. It encompasses a wide range of horsepower, from 2 HP to 300 HP, and various engine configurations including 2-stroke and V-engine designs. The manual details systems such as ignition, fuel, cooling, and exhaust, along with outboard lower unit transmissions. Designed for reliability and performance, these engines have been a staple in marine applications, and this manual provides the necessary information to maintain their operational excellence. This extensive English-language manual, exceeding 2000 pages, offers detailed guidance for service, maintenance, overhaul, adjustments, and repairs. It includes step-by-step illustrated procedures, photographs, and electrical wiring diagrams to assist owners and technicians. Key areas covered include fuel systems, lower units, tune-ups, troubleshooting common issues like starting problems and overheating, and specific maintenance tasks such as gearcase lubrication and fuel mix ratios. The manual is fully bookmarked for easy navigation and is compatible with Windows and Mac operating systems, accessible on various devices.