This workshop service manual provides comprehensive information for the Mercury Mariner Marathon outboard engine. Designed for reliable performance, this 75 HP gasoline-powered engine features a water-cooled system and an outboard lower unit with Forward, Neutral, and Reverse gears. Its robust engineering is intended to deliver consistent power and durability for various marine applications. This manual is an essential resource for owners and technicians, detailing repair and overhaul procedures. It covers critical aspects of maintaining the Mercury Mariner Marathon, ensuring its optimal function and longevity. The information provided is structured to assist users with a solid understanding of general marine engine practices in performing necessary maintenance and repairs.