This manual covers Westerbeke Marine Diesel Engines and Generators, specifically designed for marine propulsion and power generation. It provides detailed information for various engine and generator models, including the 38B FOUR, W-33, 42B FOUR, W-27, W-33A, R08D, W-27A engines, and WMD 11.0-60Hz, WMD 8.3-50Hz, 11.0 BTO, WMD 12.5-60Hz, 12.5 BTDA, WMD 9.4-50Hz, 9.4 BTDA, 12.5 BTD, 8.3 BTD, and 9.4 BTD generators. These robust 4-cylinder diesel units are engineered for reliable performance in demanding marine environments, offering both propulsion and essential onboard power at 50Hz and 60Hz frequencies. This comprehensive Factory Service/Repair/Workshop Manual in English is your essential guide for maintaining and repairing your Westerbeke equipment. It includes detailed maintenance procedures, step-by-step repair instructions with diagrams, troubleshooting guides for engines and generators, and technical specifications. Coverage extends to cooling systems, electrical systems, control panels, and torque specifications, ensuring you have the necessary information to keep your marine diesel engine and generator operating at peak efficiency and reliability.