🏷️ Basic Information Identification Make: Yanmar Model: 3YM30, 3YM20, 2YM15 Year: N/A (Service Manual covers multiple models/years) Generation: N/A 📋 Manual Details Publication Info Manual Type: Service Manual Language: English Format: PDF Compatibility Operating System Compatibility: All Versions of Windows & Mac Requirements Software Requirements: Adobe PDF Reader Content Overview Included Sections: General, Inspection and adjustment, Troubleshooting, Disassembly and reassembly, Inspection and servicing of basic engine parts, Fuel injection equipment, Intake and exhaust system, Lubrication system, Cooling water system, Reduction and reversing gear, Remote control, Electrical system, Service standards, Tightening torque for bolts and nuts, Colophon ⚙️ Engine Specifications Engine Identification Engine Type: Marine Diesel Engine Engine Dimensions Displacement 3Ym30: 1.266 L (77.2 cu. in.) Displacement 3Ym20: 1.051 L (64.1 cu. in.) Displacement 2Ym15: 0.776 L (47.3 cu. in.) Power Output Power 3Ym30: 21.3 kW (28.6 hp) @ 3760 RPM Power 3Ym20: 16.2 kW (21.7 hp) @ 3760 RPM Power 2Ym15: 11.1 kW (14.9 hp) @ 3760 RPM Engine Configuration Cylinders: 3 (for 3YM30, 3YM20), 2 (for 2YM15) Cooling System Cooling Method: Direct Cooling or Indirect Cooling (depending on configuration) 🔧 Transmission Gearbox Details Type: Reduction and Reversing Gear (e.g., KM3V, KM4V series) Gear Ratios Reduction Gear Ratios: Variable (refer to specific model/gearbox specifications in manual) 🔧 Maintenance Lubrication System Engine Oil Capacity: Approximately 2.1 L (varies slightly by model, refer to manual for precise amount) Fuel System Fuel Filter Replacement Interval: Recommended periodically as per manual Cooling System Coolant Type: Ethylene Glycol based coolant recommended (refer to manual for specifications) Belt Maintenance Alternator Belt Tension Adjustment: Refer to inspection and adjustment section 📄 Technical Data Tightening Torques Valve Clearance Adjustment: Refer to service standards section Engine Mount Bolt Torque: Refer to tightening torque for bolts and nuts section Electrical System Charging System Voltage: 12V