This Service Repair Workshop Manual covers the Mercury Mariner 115HP 4 CYL. OUTBOARD ENGINE manufactured between 1988 and 1989. Engineered for reliability and performance, this outboard engine is designed for a variety of marine applications. Its robust construction and efficient 4-cylinder design provide dependable power for demanding tasks on the water. This comprehensive manual is your essential guide to maintaining and repairing your Mercury Mariner outboard engine. It provides detailed procedures for routine maintenance, troubleshooting common issues, and understanding technical specifications. With high-quality diagrams and exploded views, this manual is suitable for both do-it-yourself owners and experienced mechanics, ensuring your engine remains in optimal working condition.