The Mercury 6 / 8 / 9.9 / 10 / 15 Service Manual, covering models starting from the year 1986, is a comprehensive guide for technicians, marine mechanics, and boat owners seeking detailed information on the maintenance, repair, and servicing of Mercury outboard motors within the specified horsepower range and model years.

Key features of this service manual include:

1. **Technical Specifications:** Detailed technical specifications and essential data about the Mercury outboard motors, including engine specifications, dimensions, and other critical information.

2. **Maintenance Procedures:** Step-by-step instructions for routine maintenance tasks, such as oil changes, filter replacements, and other checks to ensure the smooth operation and longevity of the outboard motors.

3. **Diagnostic Information:** Troubleshooting guides and diagnostic procedures to identify and address potential issues with the outboard motors' systems, electronics, and components.

4. **Repair and Service Procedures:** In-depth guidance on repairing and servicing various components, systems, and subsystems of the Mercury outboard motors. This includes the powerhead, lower unit, ignition system, fuel system, and more.

5. **Illustrations and Diagrams:** Visual aids, diagrams, and illustrations to assist in understanding the components and their assembly, making it easier for technicians to perform accurate repairs.

6. **Parts Catalog:** Detailed parts catalogs with exploded views and part numbers, facilitating the identification and ordering of specific components.

7. **Special Tools and Equipment:** Information about any special tools or equipment required for specific maintenance or repair tasks, ensuring that technicians are adequately equipped.

8. **Wiring Diagrams:** Comprehensive wiring diagrams for electrical systems, enabling technicians to trace and diagnose electrical issues effectively.

9. **Safety Information:** Safety guidelines and precautions to be followed during maintenance and repair procedures, emphasizing the importance of safety for both the technician and the boat owner.

This service manual is an indispensable resource for anyone involved in the maintenance and repair of Mercury outboard motors within the specified horsepower range and model years. Its detailed instructions, diagrams, and comprehensive information contribute to the overall efficiency and reliability of Mercury outboard motors, enhancing the boating experience for enthusiasts and professionals alike.