This manual covers the Volvo Penta DP-B and DP-B1 sterndrives. Volvo Penta is renowned for its robust engineering and reliable marine propulsion systems, designed for demanding aquatic environments. The DP-B and DP-B1 models exemplify this commitment, offering efficient power and dependable performance for a variety of watercraft. This service repair workshop manual provides comprehensive information specific to these units, ensuring their continued optimal operation. This English-language manual is designed to assist owners with basic mechanical skills, independent auto service professionals, and authorized dealer service departments. It details essential maintenance procedures, including step-by-step service instructions and tightening torque specifications. Furthermore, it offers in-depth repair instructions, troubleshooting guidance, and includes necessary diagrams, illustrations, and wiring schematics. The manual covers various transmission components such as the shift mechanism, intermediate housing, lower gear system, propeller shaft, forward gear system, vertical shaft, trim system, and sterndrive extensions, along with sterndrive removal and installation.