This comprehensive service manual covers Mercruiser marine engines, specifically the GM V-8, 454 CID (7.4L) and 502 CID (8.2L) models. It provides detailed information and instructions for servicing and maintaining these engines, enabling you to perform a wide range of tasks. The manual includes sections on general information, maintenance procedures, troubleshooting techniques, removal and installation of engine components, starting systems, ignition systems, charging systems, instrumentation, wiring diagrams, fuel systems, cooling systems, exhaust systems, drives, and power steering systems. This manual serves as an indispensable resource for mechanics, boat owners, and anyone who wants to understand and maintain these powerful Mercruiser engines. With its detailed explanations, clear illustrations, and step-by-step instructions, this manual empowers users to diagnose problems, perform repairs, and ensure the optimal performance of their engines.

The Mercruiser #16-Marine Engines-GM V-8-454 CID (7.4L) is a powerful and reliable marine engine that has been a mainstay in the boating industry for decades. This engine, often referred to simply as the "454," is a member of the GM V-8 family, known for its robust construction and exceptional performance. It boasts a displacement of 7.4 liters (454 cubic inches), offering significant horsepower and torque for a variety of boating applications, from cruising to waterskiing and even high-performance racing. The 454 engine has been available in both naturally aspirated and supercharged configurations, allowing boat owners to customize their power needs based on their specific preferences. The engine's design emphasizes durability and longevity, making it a reliable choice for demanding marine environments. Mercruiser's 454 engine stands as a testament to the company's commitment to providing boaters with robust and powerful performance. It has undergone numerous refinements over the years, continuously improving its efficiency, fuel economy, and environmental friendliness. The engine's design is tailored specifically for marine use, incorporating features like salt-resistant components and a robust cooling system to ensure optimal operation in challenging aquatic environments. The 454 is widely compatible with Mercruiser's comprehensive range of sterndrive and inboard propulsion systems, offering boat builders and owners a versatile engine option that can be integrated seamlessly into various boat designs. Whether it's powering a luxurious cruiser, a nimble runabout, or a high-performance racing boat, the Mercruiser 454 engine delivers a blend of power, reliability, and efficiency that has made it a popular choice for generations of boaters.