This manual covers the Yamaha 25BMH, E25BMH, and 30HMH outboard motors. These 2-cylinder, water-cooled engines feature a 430 cc displacement and are designed for reliable performance on the water. The 25hp models deliver 18.4 kW at 5500 rpm, while the 30hp models provide 22.1 kW at 5500 rpm. Both utilize a CDI ignition system and carburetor fuel induction, offering efficient operation. The transmission system includes forward, neutral, and reverse gears with a 2.15:1 gear ratio. These engines are engineered for durability and consistent power output, making them suitable for a variety of marine applications.

The purpose of this English-language service repair manual is to provide comprehensive guidance for the maintenance and repair of the Yamaha 25BMH, E25BMH, and 30HMH outboard motors. It details essential procedures, technical specifications, and troubleshooting steps necessary to keep the engines operating at peak performance. Key areas covered include lubrication, recommended spark plug types and gaps, fuel and oil requirements, and information on the trim system. This manual is an indispensable resource for owners, technicians, and mechanics seeking to ensure the longevity and optimal functionality of their Yamaha outboard engines.

This manual covers the Yamaha 25BMH, E25BMH, and 30HMH outboard motors. These 2-cylinder, water-cooled engines feature a 430 cc displacement and are designed for reliable performance on the water. The 25hp models deliver 18.4 kW at 5500 rpm, while the 30hp models provide 22.1 kW at 5500 rpm. Both utilize a CDI ignition system and carburetor fuel induction, offering efficient operation. The transmission system includes forward, neutral, and reverse gears with a 2.15:1 gear ratio. These engines are engineered for durability and consistent power output, making them suitable for a variety of marine applications.

The purpose of this English-language service repair manual is to provide comprehensive guidance for the maintenance and repair of the Yamaha 25BMH, E25BMH, and 30HMH outboard motors. It details essential procedures, technical specifications, and troubleshooting steps necessary to keep the engines operating at peak performance. Key areas covered include lubrication, recommended spark plug types and gaps, fuel and oil requirements, and information on the trim system. This manual is an indispensable resource for owners, technicians, and mechanics seeking to ensure the longevity and optimal functionality of their Yamaha outboard engines.