This comprehensive service repair manual covers Mercury 90-300 HP outboard motors manufactured between 1965 and 1989. It includes detailed instructions and illustrations for all Mercury models, encompassing both inline 6 and V6 configurations, as well as 2-stroke models with fuel injection and MR Drive technology. The manual provides thorough coverage of various aspects of your outboard, including specifications, maintenance procedures, general information, electrical systems, ignition, carburetors, EFI systems, powerhead, mid-section, lower unit, attachments and control linkage, throttle and shift linkage, tiller handle, manual starter, diagnostic troubleshooting, and wiring diagrams. Whether you're a seasoned mechanic or a DIY enthusiast, this manual offers the essential information you need to service, repair, rebuild, and diagnose your Mercury outboard motor. It's the same manual used by professional technicians and workshops, making it a valuable resource for anyone who wants to tackle their own repairs.

The Mercury 90-300 HP Outboard 1965-1989 Service Repair Manual is an indispensable resource for owners and mechanics of classic Mercury outboard motors. This comprehensive manual covers a wide range of models from the iconic 90 HP to the powerful 300 HP units, encompassing the golden age of Mercury outboards. The manual offers detailed technical specifications, wiring diagrams, exploded views, and step-by-step instructions for troubleshooting, repair, and maintenance. It serves as a comprehensive guide for addressing common issues, performing routine maintenance, and conducting major overhauls. With clear illustrations and detailed explanations, the manual empowers users to confidently navigate the complexities of these powerful engines. The Mercury 90-300 HP Outboard 1965-1989 Service Repair Manual is a testament to the enduring legacy of Mercury Marine. These outboards were renowned for their reliability, performance, and durability, powering countless fishing boats, pleasure craft, and commercial vessels. The manual ensures that these engines can continue to operate flawlessly for years to come. Whether you're a seasoned mechanic or a dedicated DIY enthusiast, this manual provides the necessary tools and knowledge to keep your classic Mercury outboard running in peak condition. This valuable resource helps preserve the rich history of Mercury outboards, ensuring that these iconic engines remain a testament to engineering excellence and a source of enjoyment for generations to come.