This workshop service repair manual covers the Mercury Mariner SeaPro outboard engine, a robust and reliable marine propulsion system designed for a variety of watercraft. Known for its efficient 25 HP output, this water-cooled engine features a CDI ignition system and carburetor fuel induction, ensuring dependable performance. Its engineering prioritizes durability and ease of operation, making it a trusted choice for both recreational and commercial use. The Mariner SeaPro is built to deliver consistent power and smooth operation across different boating conditions. This comprehensive manual provides essential information for maintaining and repairing your Mercury Mariner SeaPro engine. It details all aspects of service, including routine maintenance procedures, troubleshooting common issues, and in-depth technical specifications. Owners, technicians, and mechanics will find guidance on lubrication, fuel systems, ignition, and more, enabling them to keep the engine in optimal working condition. The manual's scope covers all models, offering clear instructions and diagrams to ensure accurate and efficient service.