🏷️ Basic Information

Make:

Yanmar

Model:

3YM30, 3YM20, 2YM15

Year:

N/A (Service Manual covers multiple models/years)

Generation:

N/A

📋 Manual Details

Manual Type:

Service Manual

Language:

English

Format:

PDF

Operating System Compatibility:

All Versions of Windows & Mac

Software Requirements:

Adobe PDF Reader

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 Type:

Marine Diesel Engine

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 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

Cylinders:

3 (for 3YM30, 3YM20), 2 (for 2YM15)

Cooling Method:

Direct Cooling or Indirect Cooling (depending on configuration)

🔧 Transmission

Type:

Reduction and Reversing Gear (e.g., KM3V, KM4V series)

Reduction Gear Ratios:

Variable (refer to specific model/gearbox specifications in manual)

🔧 Maintenance

Engine Oil Capacity:

Approximately 2.1 L (varies slightly by model, refer to manual for precise amount)

Fuel Filter Replacement Interval:

Recommended periodically as per manual

Coolant Type:

Ethylene Glycol based coolant recommended (refer to manual for specifications)

Alternator Belt Tension Adjustment:

Refer to inspection and adjustment section

📄 Technical Data

Valve Clearance Adjustment:

Refer to service standards section

Engine Mount Bolt Torque:

Refer to tightening torque for bolts and nuts section

Charging System Voltage:

12V