This workshop service repair manual provides comprehensive information for the Mercury Mariner outboard engine. Engineered for reliability and performance, this engine features a powerful 250 HP V6 powerplant with electronic fuel injection and a water-cooled system. Its robust construction and advanced technology ensure efficient operation and durability for a wide range of marine applications. The approximate 3.0L displacement and responsive EFI system deliver excellent power and fuel economy, making it a capable choice for demanding boating activities. This manual serves as an essential resource for maintaining and repairing your Mercury Mariner outboard. It covers detailed procedures for scheduled maintenance, fluid specifications, and component replacement. You will find in-depth technical specifications, troubleshooting guides, and electrical system information, all presented in English across hundreds of pages. Whether you are an owner performing routine checks or a technician undertaking complex repairs, this official factory service manual provides the necessary knowledge to keep your engine operating at its peak performance and longevity.