Mercury - Manual-Install - 90-864197075. The Mercury Manual-Install - 90-864197075 is an official installation guide created to walk you through the correct setup and configuration of select Mercury Marine components. Whether you're a technician or a DIY boater, this manual offers step-by-step instructions that help ensure your parts are installed properly for peak performance and safety.. Key Features. Genuine Mercury Resource - Produced by Mercury Marine for accurate, up-to-date installation s