This document provides comprehensive information for the Mercury Mariner Outboard motor, a robust 70 HP outboard motor designed for reliable performance on the water. Engineered for durability and efficiency, this motor is a trusted choice for a variety of boating applications, from recreational fishing to light utility work. Its water-cooled system ensures optimal operating temperatures, contributing to its longevity and consistent power output. This workshop service repair manual is your essential guide to understanding, maintaining, and repairing your Mercury Mariner Outboard. It covers critical areas including routine maintenance procedures, detailed troubleshooting steps, and essential technical specifications. By following the guidelines within this manual, owners and technicians can ensure the continued optimal performance and reliability of their outboard motor.