🏷️ Basic Information Identification Make: Yanmar Model: 2QM20(H), 3QM30(H) Type: Marine Diesel Engine 📋 Manual Details Product Information Product Name: YANMAR 2QM20(H) 3QM30(H) Marine DIESEL Engine Service Repair Manual Download PDF Manual Type: Service Repair Manual Language: English Page Count: 349 Format: PDF Delivery: Instant Download Features: Printable, Bookmarked, Searchable Compatibility: Windows, Mac, ISO, iPhone, iPod, Android Content Illustrations: Detailed illustrations, exploded diagrams, drawings, and photos ⚙️ Engine Specifications General Engine Type: Diesel Aspiration: Naturally Aspirated Cooling System: Water-cooled Ignition System: Compression Ignition 2Qm20H Displacement: 1.341 L (81.8 cu in) Cylinders: 2 Bore: 76 mm (3.0 in) Stroke: 73 mm (2.9 in) Power Output: 20 PS (14.7 kW; 19.7 hp) at 2400 RPM 3Qm30H Displacement: 2.012 L (122.8 cu in) Cylinders: 3 Bore: 76 mm (3.0 in) Stroke: 73 mm (2.9 in) Power Output: 30 PS (22.1 kW; 29.6 hp) at 2400 RPM Fuel System Type: Indirect Injection (IDI) Governor Type: Mechanical Governor 🔧 Transmission Gearbox Type: Reduction and Reversing Gear 🔧 Maintenance Lubrication Oil Capacity: Refer to manual for specific capacities General Service Procedures: Comprehensive repair, servicing, technical maintenance & troubleshooting