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MAN Energy Solutions
20V51/60DF
The MAN 20V51/60DF is a 4‑stroke V‑type, dual‑fuel (LNG/HFO) main propulsion engine delivering up to 24 MW at ~500 rpm, designed for large ocean‑going vessels with stringent emission limits.
24000.0 kW
Power
Engine Specifications
20
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
24000
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 #123375
· ✓ still in production