This manual covers the BMW Marine Engine, specifically the D35 and D50 Diesel models. While production years are not specified, these engines are engineered for robust performance and reliability in marine applications. The D35 variant typically features a displacement of approximately 3.5 liters, while the D50 offers around 5.0 liters. Detailed specifications regarding power output, cooling systems, and drive types will be found within the manual, providing essential information for understanding the unique capabilities of these BMW marine powerplants. The purpose of this Service Repair Workshop Manual is to provide comprehensive guidance for the maintenance, repair, and troubleshooting of your BMW Marine Engine. It includes detailed step-by-step instructions, hundreds of pages of content with photos and diagrams, and exploded views to assist in all service procedures. This manual covers critical areas such as lubrication, filter replacement, diagnostic procedures, and electrical system repairs, ensuring that owners, mechanics, and technicians have the necessary information to keep the engine operating optimally.