This Service Repair Manual covers the Westerbeke W-52/63B & 63C-FOUR Marine Diesel Engines and the 15KW-60Hz & 12KW-50Hz Generator. These robust marine diesel engines and generators are engineered for reliable marine propulsion and electrical power generation, offering single and three-phase output. The Westerbeke line is recognized for its quality construction and dependable performance in demanding marine environments. This comprehensive English language manual provides detailed information essential for the maintenance and repair of your Westerbeke equipment. It covers routine and preventive maintenance procedures designed to prevent premature failure and reduce repair costs. Owners, mechanics, and technicians will find valuable guidance on troubleshooting, technical specifications, and operational best practices to ensure optimal performance and longevity of the marine diesel engines and generators.