This manual covers the Yamaha 4HP Outboard motor, produced between 1996 and 2006. Designed for reliable performance, these outboard motors feature a 1-cylinder engine configuration and are available in both 2-stroke and 4-stroke variants, utilizing a carburettor for fuel delivery. This workshop manual provides comprehensive information for owners and technicians alike, ensuring the longevity and optimal functioning of your Yamaha outboard. The factory workshop manual is presented in English and details essential maintenance procedures, troubleshooting guides, and technical specifications. Key areas covered include general information, engine and fuel system details, power and lower unit servicing, electrical systems, and troubleshooting common issues. This resource is designed to empower users with the knowledge required for effective maintenance and repair, ensuring the continued operational excellence of the Yamaha 4HP Outboard motor.