This manual covers the Mitsubishi F9Q engine, a 2.8-liter (2771cc) inline 4-cylinder diesel engine. Engineered for reliability and performance, this engine utilizes Common Rail Direct Injection and a water-cooled system. Its specifications, including a bore of 90.0 mm and a stroke of 108.0 mm, contribute to its power output, which typically ranges from approximately 125-140 horsepower and 270-300 Nm of torque, depending on the specific application. The F9Q engine is designed to meet Euro III/IV emission standards and is compatible with both manual and automatic transmissions. This comprehensive Service Repair Workshop Manual in English provides essential information for maintaining and repairing the Mitsubishi F9Q engine. It details routine maintenance procedures, including recommended oil types (API CI-4 or ACEA E7) and oil capacity (approximately 7.0-7.5 liters with filter), though specific service intervals should be confirmed with the vehicle's manual. Technical specifications, troubleshooting guidance, and safety protocols are thoroughly explained to assist owners, mechanics, and technicians in ensuring the optimal performance and longevity of this robust diesel engine.