This manual covers the Yamaha 20D 25N outboard motor, manufactured in 2007. Designed for marine propulsion, these models are known for their robust engineering and reliability. The 20D series is identified by the serial number prefix 6L3K, while the 25N series uses the prefix 6L2K. This original factory parts catalogue provides comprehensive details for maintaining and servicing your Yamaha outboard motor. The purpose of this English-language manual is to serve as an indispensable resource for owners, mechanics, and technicians. It details all components, including the top cowling, cylinder crankcase, crankshaft and piston assembly, intake, carburetor, oil pump, fuel system, starter generator, electrical components, starting motor, bottom cowling, steering components, control systems, bracket components, upper and lower casing, fuel tank, steering guide, remote control box, remote control assembly, and repair kits. A numerical index is also included for easy reference.