This workshop service repair manual provides comprehensive information for the marine engine. This inline 6-cylinder engine, with a displacement of 3.0L (181 cubic inches), typically produces 152 horsepower. It features a bore of 3.75 inches and a stroke of 3.44 inches, with a typical compression ratio of 8.5:1. The engine is equipped with a carbureted fuel system and a distributor ignition system, and utilizes a marine closed cooling system. While specific years are not detailed, this manual covers the essential engineering and operational aspects of this robust marine powerplant, designed for reliability and performance in demanding aquatic environments. This English-language workshop manual is designed to be an indispensable resource for owners, mechanics, and technicians. It details all aspects of maintenance, repair, and technical specifications for the engine. Coverage includes lubrication requirements, such as oil type and capacity, spark plug gap specifications, and coolant types. The manual also outlines detailed service intervals and procedures for the engine and associated marine gearbox. With hundreds of pages of factory service information, this manual ensures that the engine can be maintained and repaired to factory standards, maximizing its longevity and operational efficiency.