This document provides comprehensive service information for the Mercury Mariner Outboard 90 HP motor. Designed for reliable performance on the water, this outboard motor is engineered to deliver consistent power and efficiency. Its robust construction and proven design ensure dependable operation for a wide range of boating applications. The 90 HP power output makes it suitable for various hull sizes, offering a balance of speed and fuel economy for recreational and light commercial use. This Factory Service Repair Manual is an essential resource for maintaining and repairing your Mercury Mariner Outboard 90 HP. It covers critical procedures and specifications necessary for optimal performance and longevity. Inside, you will find detailed instructions on routine maintenance, troubleshooting common issues, and in-depth technical specifications. This manual is intended for owners, technicians, and mechanics seeking to understand and service the outboard motor effectively, ensuring it operates at peak condition.