This comprehensive Mercury Mercruiser Marine Engines Number 9 GM V-8 Cylinder Workshop Service Repair Manual provides detailed instructions and high-quality diagrams for servicing and repairing your boat's engine. This manual covers a range of model years from 1985 to 1988, making it a valuable resource for boat owners and mechanics alike. Inside, you'll find detailed information on critical engine components and systems, including: * **Important Information:** Begin with essential information about your engine, including safety precautions and troubleshooting tips. * **Removal and Installation:** Learn the proper procedures for removing and installing engine components, ensuring a smooth and successful repair process. * **Engine:** Gain insights into the inner workings of your engine, with detailed descriptions of each system and component, including the engine block, crankshaft, pistons, and more. * **Electrical System:** Understand the intricacies of your boat's electrical system, covering aspects like starting, charging, and lighting systems. * **Fuel System:** Master the operation of your fuel system, including fuel lines, pumps, injectors, and carburetors. * **Cooling System:** Learn how to maintain and repair your cooling system, including the radiator, water pump, and thermostat. * **Exhaust System:** Gain knowledge of your exhaust system and its components, ensuring proper performance and minimizing emissions. * **Drive Systems:** Explore the workings of your boat's drive system, understanding the components and their roles in propulsion. * **Power Steering:** Learn how to service and troubleshoot your boat's power steering system, ensuring smooth and safe handling. This manual is designed to empower you to handle a wide range of maintenance and repair tasks, saving you time and money. Whether you're a seasoned mechanic or a DIY enthusiast, this comprehensive guide is an invaluable resource for keeping your Mercury Mercruiser engine running smoothly.

The Mercury Mercruiser Number 9 GM V-8 Cylinder engine, featured in the 1985-1988 Workshop Service Repair Manual, represents a potent and enduring powerplant in the realm of marine propulsion. These engines, manufactured by General Motors and rebranded by Mercury Mercruiser, offered a blend of performance and reliability that made them a popular choice for recreational and commercial boaters alike. The "Number 9" designation refers to the engine's displacement, with a capacity of 454 cubic inches (7.4 liters). This robust V-8 architecture provided ample torque and horsepower for a wide range of marine applications, from sleek runabouts to larger cruisers. The engines were renowned for their smooth operation and durability, thanks to their cast-iron construction and proven GM engineering. The 1985-1988 model years of the Mercury Mercruiser Number 9 GM V-8 Cylinder engines saw a multitude of improvements and refinements. These included updated fuel injection systems for enhanced efficiency and emissions, along with advancements in cooling and lubrication technologies. The inclusion of a dedicated Workshop Service Repair Manual for these specific years underscores the importance of accurate and detailed information for proper servicing and maintenance. This manual serves as an indispensable resource for marine mechanics, boat owners, and enthusiasts, providing comprehensive technical specifications, troubleshooting guides, and step-by-step instructions for a wide range of repairs and adjustments. From basic engine maintenance to complex component overhauls, this manual equips users with the knowledge and tools necessary to keep their Mercury Mercruiser Number 9 GM V-8 Cylinder engines running at peak performance.