This Service Repair Manual covers Briggs & Stratton 16-HP L-Head Twin Cylinder engines, specifically models 400400, 400700, 402400, 402700, 404400, 404700, 422400, 422700, 462700 with sleeve bore construction, and models 401400, 401700, 421400, 421700 with aluminum bore construction. These engines are known for their robust design and reliable performance, making them suitable for a wide range of applications requiring dependable power. This comprehensive manual provides detailed instructions and technical specifications essential for maintaining and repairing your Briggs & Stratton engine. It includes coverage for all major systems, such as lubrication, cooling, fuel, ignition, starting, electrical, and controls, as well as in-depth procedures for engine disassembly and assembly. With high-definition diagrams, well-structured content, and printable pages, this manual serves as an invaluable resource for owners, mechanics, and technicians to ensure optimal engine performance and longevity.