This service repair manual covers the Yamaha 25BMH and 30HMH outboard motors. These models are engineered for reliable performance and durability in marine applications. The manual provides comprehensive information to ensure these outboard motors operate at their peak efficiency, reflecting Yamaha's commitment to quality and user satisfaction. This English-language service manual offers detailed guidance for maintenance, repair, and troubleshooting. It includes essential specifications, circuit diagrams, exploded views, and step-by-step repair instructions. The manual is designed to assist owners, technicians, and mechanics in effectively servicing and maintaining their Yamaha outboard motors, ensuring longevity and optimal functionality.