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MAN Energy Solutions
12V51/60DF
The MAN 12V51/60DF is a high‑power (14.4 MW) V‑type, four‑stroke marine diesel engine capable of dual‑fuel operation on LNG and HFO, offering seamless fuel switching and IMO Tier III emissions compliance.
14400.0 kW
Power
Engine Specifications
12
Cylinders
510 mm
Bore
600 mm
Stroke
4-stroke
Stroke Type
Components & Design
Component data being added…
Technical Data
Swept Volume per Cylinder
122.6 dm³
Output per Cylinder (MCR)
1050 kW @ 500-514 rpm
Diesel Fuel Consumption (85% MCR)
176 g/kWh
Gas Mode Consumption (85% MCR)
7150 kJ/kWh
Dry Mass - 12V51/60DF (Propulsion)
189 t
Dry Mass - 18V51/60DF (Propulsion)
265 t
Engine Cycle
Four-Stroke
Emissions Compliance
IMO Tier II, IMO Tier III (Gas & Diesel+SCR modes)
Fuel Flexibility
Seamless switching between gas/liquid during operation
power kw
14400
rpm
500
fuel type
LNG/HFO (Dual-Fuel)
configuration
V
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Common failures & inspection points
Lubricating Oil System Contamination: Extended operation with activated contamination display can lead to lube oil supply problems; running-in filter must be re
Piston Temperature Management: Crown scuffing risk if operating conditions cause thermal expansion to reduce piston-liner clearance; typically from over-fueling
Gas Fuel System Integrity: Dual-fuel systems require strict maintenance of gas supply cleanliness and pressure relief systems; hydrocarbon sensor monitoring ess
Turbocharger Boost Management: Stock turbocharger limitations at low-speed regions can compromise fuel consumption and combustion mode performance in dual-fuel
Cross-Head Bearing Maintenance: While MAN V51/60DF features optimized marine-head design for reduced service downtime, proper oil film maintenance and periodic
Type-general inspection and maintenance points for this equipment category — not model-specific.
Suppliers & Spare Parts
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Equipment Model #123371
· ✓ still in production