This service repair workshop manual covers Mercury outboard motors, specifically the 6HP, 8HP, 9.9HP, 10HP, and 15HP 2-stroke models manufactured between 1986 and 2003. These reliable outboard motors are known for their robust engineering, designed for a wide range of marine applications. This manual provides comprehensive information to ensure these engines perform optimally throughout their service life. The purpose of this manual is to offer detailed guidance for all repair, servicing, and troubleshooting procedures. It contains hundreds of pages filled with step-by-step instructions, clear photos, and exploded diagrams to assist owners, mechanics, and technicians. By following the procedures outlined within, users can effectively maintain and repair their Mercury outboard motors, ensuring continued performance and longevity.