This Service & Repair Manual covers the 1996 Yamaha outboard motors, specifically models 20MLHU and 20MSHU, which are part of the 20D, 25N, 20U, and 25U series. These water-cooled outboard motors offer 20 or 25 horsepower, depending on the specific model, and are engineered for reliable performance on the water. The manual provides comprehensive details for these units, ensuring their continued operational excellence. This manual is designed to be an essential resource for maintaining and repairing your Yamaha outboard motor. It includes detailed information on engine specifications, scheduled maintenance procedures, lubrication requirements, and electrical system components. Furthermore, it offers guidance on troubleshooting common issues and provides in-depth coverage of the power unit, lower unit, and bracket unit. This comprehensive guide empowers owners and technicians with the knowledge needed for effective service.