This manual covers the Mercury Mariner Marathon outboard motor, a robust and reliable marine engine designed for a variety of boating applications. Known for its dependable performance and efficient operation, the Mariner Marathon series offers a 55 HP power output, making it suitable for a range of watercraft. Its engineering emphasizes durability and ease of maintenance, ensuring a consistent and enjoyable boating experience for owners. This comprehensive Factory Service Repair Manual in English provides detailed guidance for maintaining and repairing your Mercury Mariner Marathon. It includes essential information on engine specifications, troubleshooting common issues, performing routine maintenance tasks, and understanding the electrical and transmission systems. With hundreds of pages of technical data and procedural instructions, this manual is an indispensable resource for owners, technicians, and mechanics seeking to ensure the optimal performance and longevity of their outboard motor.