This manual covers the Yamaha 140 HP V4 Outboard engine, manufactured between 1984 and 1996. This 2-stroke, water-cooled engine features a 1730cc displacement and a V4 cylinder configuration, delivering 140 horsepower. Designed for marine applications, these engines are known for their robust construction and reliable performance on the water. Understanding the intricacies of this engine is key to maximizing its potential and ensuring longevity. This comprehensive Service Repair Workshop Manual in English provides essential information for the maintenance and repair of your Yamaha 140 HP V4 Outboard. It includes detailed procedures for general maintenance, tune-ups, and diagnostic troubleshooting, along with electrical schematics and diagrams. Step-by-step instructions and illustrations guide users through complex tasks, ensuring that owners, mechanics, and technicians can effectively service and maintain the engine for optimal operation.