This Factory Workshop Manual provides comprehensive information for the Yamaha 150HP Outboard motor, covering production years from 1996 to 2006. Designed for marine propulsion, these outboard motors are engineered for reliability and performance, featuring 2-stroke and 4-stroke engine options with 6-cylinder and 4-cylinder configurations. The manual details various fuel system types, including carburettor and EFI fuel injection, ensuring coverage for a wide range of models. This manual is an essential resource for owners, mechanics, and technicians. It offers detailed, step-by-step instructions for maintenance and repair, supported by hundreds of illustrations. Key topics covered include general information, specifications, periodic inspections and adjustments, fuel system, power unit, lower unit, bracket unit, electrical system, and troubleshooting. This English-language manual is designed for easy access and use, facilitating the proper care and upkeep of your Yamaha outboard motor.