This Factory Service Manual covers Yamaha Outboard Motors manufactured between 1997 and 2009, specifically models 6MLHV and 8MLHC. These 2-stroke engines offer reliable performance with 6 HP and 8 HP options respectively, featuring a displacement of 7.4 cubic inches (122 cc) and a bore x stroke of 2.24 inches x 1.77 inches. Designed for efficient operation with unleaded gasoline and a 50:1 fuel mixture, these engines are built with Yamaha's renowned engineering quality, ensuring durability and consistent power for various marine applications. This comprehensive manual provides essential information for the maintenance and repair of your Yamaha outboard motor. It details crucial procedures for lubrication, cooling system upkeep, and spark plug specifications, including recommended types and gaps. Technical specifications, troubleshooting guidance, and safety recommendations are also included, empowering owners, mechanics, and technicians to keep these engines operating at peak performance. The manual is presented in English and identified by part number LIT-18616-01-64.