This manual covers Johnson Evinrude Outboard Motors manufactured between 1973 and 1990, encompassing a horsepower range from 2 to 40 HP. These engines are known for their robust construction and reliable performance, making them a popular choice for a variety of marine applications. The comprehensive coverage extends to specific models including the 2, 2.5, 3, 3.5, 4, 4 Excel, 4 Ultra, 4 Deluxe, 4.5, 5, 6, 7, 7.5, 8, 9.5, 9.9, 15, 18, 20, 25, 28, 30, 35, and 40 HP variants. The purpose of this Service Repair Manual is to provide detailed guidance for the maintenance, repair, restoration, rebuilding, and diagnosis of these Johnson Evinrude outboard motors. It is designed for professional technicians, mechanics, workshops, and DIY enthusiasts, offering clear, step-by-step instructions accompanied by zoomable illustrations, detailed component explosions, and exploded views. The manual also includes comprehensive part number breakdowns and engine component breakdowns, ensuring accurate and efficient service. Troubleshooting guidance is also provided to help resolve common issues.