This workshop manual covers the Volvo Penta 8.1L Marine Engine, a powerful V8 gasoline engine designed for marine applications. Available in various model years and configurations, including the DPX375 and DPX420 variants, this engine offers robust performance with power outputs up to 420 HP. Its 8.1-liter displacement and electronic ignition system contribute to its reliable operation. The engine is compatible with SX and DP-S sterndrives, as well as the DPX sterndrive system, making it a versatile choice for a range of vessels. This comprehensive workshop manual provides essential information for the service, repair, and maintenance of the Volvo Penta 8.1L Marine Engine. It details crucial procedures, technical specifications, and recommended maintenance schedules, including guidance on lubrication and cooling systems. Whether you are an owner, a professional mechanic, or a technician, this manual serves as an indispensable resource to ensure the optimal performance, longevity, and safety of your marine engine.