The Mercury Mercruiser 502 CID engine, produced between 1993 and 1997, represents a robust V8 power plant designed for marine applications. With a displacement of 8.2 liters (502 cubic inches), this engine typically delivers between 320 and 415 horsepower, depending on the specific application and year. Its engineering emphasizes reliability and performance, making it a capable choice for various boating needs, whether configured for sterndrive or inboard operation. The engine features a carbureted fuel system, utilizing Quadrajet or Holley carburetors, and offers options for raw water or closed cooling systems. This Workshop Service Repair Manual provides comprehensive guidance for the Mercury Mercruiser 502 CID engine. It covers essential maintenance procedures, including recommended oil types and capacities, and intervals for replacing components like spark plugs, fuel filters, and impellers. The manual also details technical specifications, troubleshooting steps, and information on drive systems and engine weight. This resource is designed to assist owners, mechanics, and technicians in effectively maintaining, servicing, and repairing their 502 CID engines to ensure optimal performance and longevity.