This manual covers the Volvo Penta AQ131 engine. Volvo Penta is recognized for its robust engineering and reliable marine propulsion systems, designed to deliver consistent performance in demanding aquatic environments. The AQ131 model embodies this commitment to quality, offering a dependable solution for various marine applications. This comprehensive service and repair manual provides essential information for maintaining and troubleshooting your Volvo Penta AQ131 engine. It details general maintenance procedures, engine and transmission service, electrical system diagnostics, and much more. This guide is an indispensable resource for owners and technicians seeking to ensure the optimal performance and longevity of the AQ131.