This workshop service repair manual provides comprehensive information for the Mercury Mariner 15 Bigfoot, a 4-stroke outboard propeller drive known for its robust design and water-cooled system. While specific production years are not detailed, the engine features a 323 cc displacement, a CDI ignition system, and carburetor fuel induction, delivering 15 horsepower. Its engineering emphasizes reliability and performance, making it suitable for various marine applications. The Bigfoot designation suggests enhanced durability and power output for demanding conditions. This manual is designed to be an indispensable resource for maintaining and repairing your Mercury Mariner 15 Bigfoot. It covers a wide range of topics, including detailed step-by-step repair instructions accompanied by pictorial diagrams, illustrations, and exploded views. Essential technical data, such as service specifications and tightening torques, are provided. Furthermore, the manual includes critical safety precautions, special tool references, and guidance on recommended lubricants, ensuring that owners and technicians can perform all necessary maintenance and repair tasks effectively and safely.