This document provides comprehensive service information for the Mercury Mariner Jet 45 HP outboard engine. Designed for reliable performance, this jet outboard model is engineered with robust components to ensure efficient operation in various water conditions. Its construction emphasizes durability and user-friendly maintenance, making it a dependable choice for a wide range of marine applications. This Factory Service Repair Manual offers detailed guidance for owners and technicians. It covers essential maintenance procedures, including step-by-step instructions for disassembly and repair, as well as information on the fuel system, lubrication, ignition, and electrical systems. With hundreds of photos and illustrations, this manual facilitates a thorough understanding of the engine's components and systems, enabling effective troubleshooting and repair to maintain optimal performance and longevity.