This manual provides comprehensive service parts information for Kohler 18.5-24 CCOZ/CCFOZ and 20-24EOZ marine generator sets, powered by Yanmar engines. These reliable units are engineered for demanding marine environments, offering consistent power output in the 18.5 to 24 HP range. The catalog covers various models including the 18.5-24CCOZ / 15-20CCFOZ, 20EOZ / 16 / 17.5EFOZ, 23EOZ / 19EFOZ, and 24EOZ / 20EFOZ, available in both 1-Phase and 3-Phase configurations. The purpose of this Service Parts Catalog is to facilitate the identification and procurement of replacement parts for these generator sets. It includes detailed listings for key engine groups such as the cylinder block, fuel and cooling systems, and starting motor, as well as sections on accessories and kits. Additionally, the manual provides essential maintenance information, including common hardware application guidelines, general torque specifications, and hardware identification, ensuring proper servicing and longevity of your Kohler marine generator set.