This manual covers the Kubota WG1605-L-E3 gasoline engine, a 1.6-liter unit designed for applications requiring reliable power and adherence to E3 emission standards. While specific production years are not detailed, the engineering focus of Kubota engines is on robust performance and longevity. This engine is built to meet demanding operational requirements, offering a solid foundation for various industrial and commercial uses. This comprehensive repair service manual provides essential information for the maintenance and repair of the Kubota WG1605-L-E3 engine. It includes step-by-step repair procedures, critical specifications, detailed illustrations, and guidance on disassembly, assembly, cleaning, and reinstallation. The manual is intended for professional technicians and DIY mechanics with basic mechanical knowledge, enabling them to effectively service and maintain the engine to ensure optimal performance and operational efficiency.