This manual covers the Volvo Penta 230, an inboard marine engine designed for reliable performance. Built with Volvo Penta's renowned engineering quality, this engine is part of families such as AQ125B, AQ140, and AQ151. It features a 2.3-liter gasoline engine with electronic ignition, capable of producing approximately 114 HP, and can be configured with stern drive or inboard transmissions. The 230 is engineered for durability and efficiency, making it a dependable choice for marine applications. The purpose of this comprehensive service repair manual is to provide detailed information for the maintenance, repair, and troubleshooting of the Volvo Penta 230 engine. It includes essential technical specifications, routine maintenance procedures such as oil changes and spark plug settings, and diagnostic guidance. This manual is an indispensable resource for owners, mechanics, and technicians, ensuring the longevity and optimal performance of the marine engine.