This document pertains to the Kubota WG1605-L-E3, an industrial engine from the WG Series. This engine features a liquid-cooled system and a displacement of approximately 1.6 liters. Engineered for reliability and performance in demanding industrial applications, the WG1605-L-E3 represents a robust solution for various operational needs. Its design prioritizes durability and efficient operation, making it a dependable choice for its intended purpose. This Full Service Repair Manual in English provides comprehensive guidance for the maintenance and repair of the Kubota WG1605-L-E3 engine. It covers detailed repair, maintenance, rebuilding, and restoration procedures, supported by detailed drawings and photos. The manual also includes troubleshooting procedures, wiring diagrams, and important warnings and cautions. This resource is designed to assist owners, mechanics, and technicians in effectively maintaining and servicing the engine, ensuring its optimal performance and longevity.