This Service Repair Manual covers the Yamaha 25 HP 2-Stroke Outboard models manufactured between 1990 and 1996. These outboards are recognized for their robust engineering and reliable performance, making them a dependable choice for various marine applications. Designed with a 2-stroke, 2-cylinder engine featuring a displacement of 430cc and producing 25 horsepower, these units are water-cooled and utilize a carbureted fuel system, ensuring efficient operation on the water. The outboard lower unit provides essential forward, neutral, and reverse gear functions, contributing to the overall versatility and ease of use of these Yamaha engines. This comprehensive manual provides detailed instructions and technical information essential for the maintenance and repair of your Yamaha 25 HP 2-Stroke Outboard. It covers routine maintenance procedures, including tune-ups, lubrication, and fuel and electrical system upkeep, as well as a detailed maintenance schedule. In-depth repair sections address major components such as the powerhead, lower unit, trim and tilt system, starter system, ignition system, and remote control. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure the longevity, optimal performance, and safe operation of their Yamaha outboard motor.