This Service Repair Manual covers Yamaha 25BMH and 30HMH outboard motors. These engines are renowned for their robust engineering and reliable performance, making them a trusted choice for various marine applications. The Yamaha outboard motors are designed with precision and durability in mind, ensuring efficient operation and longevity for owners who depend on their watercraft. This comprehensive manual provides detailed information essential for the maintenance and repair of your Yamaha outboard motor. It includes step-by-step procedures, detailed diagrams, and illustrations covering all aspects of the unit, from routine lubrication and tune-ups to complex disassembly and reassembly. This resource is invaluable for owners, mechanics, and technicians seeking to ensure optimal performance and longevity of their Yamaha 25BMH or 30HMH outboard motor.