This Service Repair Manual covers the BMW D7 Marine Engine, a diesel-powered unit designed for marine propulsion. Engineered for reliability and performance, this water-cooled engine is built to meet the demanding requirements of marine applications. Its robust construction and advanced diesel technology ensure efficient operation and longevity, making it a dependable choice for boat owners and operators. This manual provides comprehensive guidance for maintaining and repairing the BMW D7 Marine Engine. It details essential procedures for scheduled maintenance, including air filter, fuel pump, water pump, generator, starter motor, and gearbox upkeep, as well as critical component servicing for the crankshaft, camshaft, piston, and cylinder head assemblies. Furthermore, it covers adjustments for valve clearance, valve timing, automatic decompression, and decompression lever, along with engine speed control, offering all necessary information for owners, mechanics, and technicians to ensure optimal engine performance and service life.