This manual covers Yamaha outboard motors, specifically models 25BMH and 30HMH, identified by approval model codes 61R and 61T respectively, with serial number ranges starting from S:020101, L:350101, and S:050101. These robust outboard motors are engineered for reliability and performance, suitable for a wide range of marine applications. Their design prioritizes durability and efficient operation, making them a trusted choice for boaters seeking dependable power on the water. This comprehensive English-language service and repair manual provides essential information for the maintenance and repair of your Yamaha outboard motor. It includes detailed procedures for general information, specifications, periodic checks and adjustments, fuel system, power unit, lower unit, bracket unit, electrical system, and troubleshooting. With complete tear-down and rebuild instructions, part diagrams, torque specifications, and real photo illustrations, this manual is an indispensable resource for owners and technicians alike to ensure optimal performance and longevity of the equipment.