This repair manual covers Yamaha outboard motors, specifically models 20D, 20U, 20U2, 25N, 25U, and 25U2, manufactured in 1995 and 1996. These 2-stroke, gasoline-powered engines, available in 20 HP and 25 HP variants, are engineered for reliable performance. This manual is designed to assist owners and technicians in understanding and maintaining these robust marine propulsion systems, ensuring their continued operational efficiency and longevity. The scope of this comprehensive repair manual encompasses a wide range of essential information, including general overviews, routine maintenance procedures, detailed engine and transmission specifications, and advanced troubleshooting guides. It provides in-depth coverage for repairs, parts lookup, and all aspects of upkeep, from fuel and cooling systems to electrical components and steering. This resource is an indispensable tool for anyone responsible for the service and repair of these Yamaha outboard motors.