This Service Repair Workshop Manual covers the Tohatsu MFS 8A3 and 9.8A3 outboard engines, generation A3. These 4-stroke, water-cooled engines are designed for reliable performance, with the MFS 8A3 model producing 8 HP and the MFS 9.8A3 model producing 9.8 HP, both utilizing a carburetor fuel system and CDI ignition. They offer a displacement of approximately 209 cc and feature a manual recoil starter or an optional electric start. The transmission system includes forward, neutral, and reverse gears within an outboard gearcase. This comprehensive manual provides detailed, step-by-step instructions, accompanied by highly detailed exploded pictures and diagrams, to assist both do-it-yourself enthusiasts and experienced mechanics. It covers essential areas including service information, data, inspections, adjustments, fuel system, power unit, lower unit, bracket, electrical system, troubleshooting, and wiring diagrams. The manual is designed to facilitate the proper maintenance, repair, and understanding of these Tohatsu outboard engines, ensuring their optimal performance and longevity.