The Volvo Penta 230, 250, and 251 DOHC Marine Engines represent robust engineering designed for reliable marine propulsion. These 4-cylinder, in-line gasoline engines, available in 2.3L and 2.5L displacements, deliver dependable performance across a range of horsepower. Their DOHC configuration signifies advanced valvetrain technology, contributing to efficient power delivery and smooth operation on the water. These engines are built to withstand the demands of marine environments, offering owners a blend of power, efficiency, and enduring quality for their boating needs. This comprehensive digital workshop repair manual provides essential information for the maintenance and repair of your Volvo Penta 230/250/251 DOHC marine engine. It covers all diagnostic and repair procedures from A to Z, supported by high-quality photos, illustrations, and diagrams to ensure clarity. The manual details service schedules, fluid capacities, and technical specifications, empowering owners and technicians to perform necessary upkeep and address any issues effectively. By utilizing this guide, users can maintain their engine's optimal performance and potentially reduce service and repair costs.