This document pertains to the Mercury Mariner 50 HP Bigfoot outboard engine, a 4-stroke model designed for reliable performance. While specific production years are not detailed, this engine variant is recognized for its robust build and efficient power delivery. The Bigfoot designation typically indicates enhanced torque and durability, making it suitable for a variety of demanding marine applications. Its engineering prioritizes longevity and consistent operation, ensuring a dependable experience for boaters. This comprehensive workshop service manual provides detailed guidance for the maintenance and repair of your Mercury Mariner 50 HP Bigfoot. It covers all aspects of the engine, including in-depth repair procedures with step-by-step instructions, diagrams, and illustrations. The manual also includes essential technical data, troubleshooting guides, and safety precautions to ensure correct and safe servicing. It is intended for both professional mechanics and DIY enthusiasts, offering the knowledge necessary to maintain the engine's optimal condition and longevity.