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WinGD
7X72DF
WinGD X72 / X72DF — Marinediesel, Bohrung 720 x Hub 3086 mm, 66–89 rpm rpm, 10,600–31,360 kW (5–8 cylinders at 66–89 rpm). Brennstoff: Diesel/HFO (X72); LNG/Gas (X72DF-1.x, X72DF-2.x with iCER); Methanol/Diesel (X72DF-M-1.0); Ammonia/Diesel (X72DF-A-1.0). Status: In production (X72, X72DF-1.x, X72DF-2.x); X72DF-M-1.0 active; X72DF-A-1.0 deployment Q3 2025. Verifiziert, Datenblatt verlinkt.
25620.0 kW
Power
Engine Specifications
7
Cylinders
720 mm
Bore
3086 mm
Stroke
25,620 kW
MCR Power
85.0 rpm
MCR RPM
2-stroke
Stroke Type
Family: WIN-GD X-DF
· Tier: IMO Tier III (gas mode)
· Fuel: HFO, VLSFO, MDO, LNG
Other Cylinder Configurations 33
5X35DF
5 cyl
· 4,200 kW
5X40DF
5 cyl
· 5,300 kW
5X52DF
5 cyl
· 9,400 kW
5X62DF
5 cyl
· 13,400 kW
5X72DF
5 cyl
· 18,300 kW
5X82-DF
5 cyl
· 23,050 kW
5X92DF
5 cyl
· 31,950 kW
6X35-DF
6 cyl
· 5,040 kW
6X40DF
6 cyl
· 6,360 kW
6X52DF
6 cyl
· 11,280 kW
6X62DF
6 cyl
· 16,080 kW
6X72DF
6 cyl
· 21,960 kW
6X82-DF
6 cyl
· 27,660 kW
6X92DF
6 cyl
· 38,340 kW
7X35-DF
7 cyl
· 5,880 kW
7X40DF
7 cyl
· 7,420 kW
7X52DF
7 cyl
· 13,160 kW
7X62DF
7 cyl
· 18,760 kW
7X82DF
7 cyl
· 37,660 kW
7X92DF
7 cyl
· 44,730 kW
8X35-DF
8 cyl
· 6,720 kW
8X40DF
8 cyl
· 8,480 kW
8X52DF
8 cyl
· 15,040 kW
8X62DF
8 cyl
· 21,440 kW
8X72DF
8 cyl
· 29,280 kW
8X82-DF
8 cyl
· 36,880 kW
8X92DF
8 cyl
· 51,120 kW
9X40DF
9 cyl
· 9,540 kW
9X82-DF
9 cyl
· 41,490 kW
9X92DF
9 cyl
· 57,510 kW
10X92DF
10 cyl
· 63,900 kW
11X92DF
11 cyl
· 70,290 kW
12X92DF
12 cyl
· 76,680 kW
Components & Design
Alpha Lubricator Control
WIN-GD / Hans Jensen Lubricators
WIN-GD Pulse Lubrication System
Pulse lubrication for accurate CLO timing. Feed rate adjustable 0.5-1.0 g/kWh. Lower feed on gas mode.
Lead time: 6 wk
20.0 kg
Common Rail Unit (RT-flex / X-DF)
WIN-GD / Winterthur
WIN-GD Common Rail Unit
Rail pressure ~1000 bar (fuel), ~200 bar (servo oil). Monitor rail pressure stability.
Lead time: 16 wk
1800.0 kg
Crankcase Oil Mist Detector
GEA / Schaller Automation
GEA Westfalia OMD / Schaller VN215+
Same as diesel — SOLAS mandatory regardless of fuel. Test weekly.
Lead time: 2 wk
8.0 kg
Cylinder Liner
WIN-GD
WIN-GD X-DF Cylinder Liner
Gas ports machined into liner — inspect for erosion. Wear rate significantly lower in gas mode.
Lead time: 16 wk
3200.0 kg
Dual-Fuel System (Gas Mode)
WIN-GD
WIN-GD X-DF Gas Admission System
Gas admission at 10-16 bar via scavenge ports. Pre-chamber with diesel pilot. Monitor methane slip.
Lead time: 12 wk
350.0 kg
Engine Control Unit (ECU / ECS)
WIN-GD / ABB
WIN-GD WiDE Engine Control System
WiDE = Wartsila Intelligent Diesel Engine. Dual-redundant. iCER optimization requires latest firmware.
Lead time: 8 wk
50.0 kg
Exhaust Valve (& Valve Seat)
WIN-GD
WIN-GD Exhaust Valve (X-DF)
Gas mode extends valve life significantly (less hot corrosion). Overhaul at 16,000 hrs (gas-only: 24,000 hrs).
Lead time: 10 wk
300.0 kg
FGSS (Fuel Gas Supply System - LNG/Methanol)
TGE Marine / Wartsila Gas Solutions
FGSS LNG Supply Module (ME-GI type HP / X-DF type LP)
LP-FGSS for X-DF (6-16 bar). Mandatory gas detection in duct space. Emergency shutdown drill monthly.
Lead time: 26 wk
Fuel Valve (Injector)
WIN-GD
WIN-GD X-DF Fuel Valve (diesel + pilot)
Pilot injector critical for gas mode ignition. Inspect pilot nozzle at 4,000 hrs. Main valve at 8,000 hrs.
Lead time: 6 wk
75.0 kg
Governor (Electronic/Woodward)
Woodward
Woodward 723PLUS / WIN-GD Integrated Governor
Integrated with WiDE. Gas/diesel mode switching requires governor parameter set change.
Lead time: 4 wk
15.0 kg
Hydraulic Power Supply (HPS)
WIN-GD
WIN-GD Flex HPS (Common Rail Servo Oil)
Servo oil system at ~200 bar. Filter changes every 4,000 hrs. Use approved servo oil only.
Lead time: 14 wk
2500.0 kg
Piston Crown
WIN-GD
WIN-GD X-DF Piston Crown
Gas mode reduces thermal loading. Inspect at 16,000-24,000 hrs. Extended intervals possible in gas-only service.
Lead time: 14 wk
1700.0 kg
SCR (Selective Catalytic Reduction)
HUG Engineering / Yara Marine
WIN-GD SCR Reactor (for diesel mode Tier III)
Only needed for Tier III in diesel mode (gas mode is inherently Tier III). SCR bypass in gas mode.
Lead time: 20 wk
12000.0 kg
Scavenge Air Cooler
WIN-GD / Alfa Laval
WIN-GD SAC (Plate/Shell-and-tube)
Cleaner in gas mode — extended cleaning intervals. Monitor charge air temperature after cooler.
Lead time: 14 wk
5000.0 kg
Sensors & Transmitters
WIN-GD / Danfoss / ABB
WIN-GD Sensor Suite (pressure, temp, speed, knock)
Knock detection sensors critical for X-DF gas mode — prevents detonation. Calibrate every 4,000 hrs.
Lead time: 2 wk
2.0 kg
Turbocharger Unit (ABB/MHI/Napier)
ABB Turbocharging
ABB A265-L Turbocharger
Gas mode significantly reduces fouling. Extended TC overhaul interval to 16,000-24,000 hrs in gas mode.
Lead time: 16 wk
8500.0 kg
Technical Data
Stroke/Bore Ratio
4.29
MEP X72 Diesel R1
20.5 bar
MEP X72DF Standard R1
17.3 bar
MEP X72DF-1.2 R1
15.7 bar
BSFC X72 Diesel
167 g/kWh at full power (Tier II)
BSFC X72DF-A-1.0 Diesel
168.8 g/kWh at 89 rpm, 8 cyl
Gas Consumption X72DF-A-1.0 Ammonia
368.1 g/kWh at max rating
Power per Cylinder X72DF-2.1
3,225 kW/cyl at 89 rpm
Injection System
Common Rail, electronic control
Engine Type
Camshaftless 2-stroke, reversible, low-speed
unified from engine model
True
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Common failures & inspection points
Fuel Rail Pressure Too High causing violent firing at start; fuel control failure
Verify fuel rail pressure within spec; check power supply and wiring to fuel control
Injection Nozzle Wear from normal operation causing irregular combustion
Inspect nozzle tips at ~8,000–10,000 operating hours; replace spare kit per schedule
Lubricating Oil Contamination: water and solids reduce bearing protection; dry sump circulation critical
Verify centrifugal separator bypass operation; monitor oil condition via sampling; check crankcase drain integrity
Ammonia Combustion Instability (X72DF-A-1.0): low flame speed, high activation energy, misfiring risk, N2O/NH3 emissions
Monitor cylinder pressure diagrams; verify pilot fuel injection timing/quantity; track exhaust temps and emission compliance
Scavenge Air Cooler Fouling in dust-laden trades; efficiency loss and thermal stress
Install filtration for dust-prone routes; schedule periodic cooler inspection and cleaning; monitor scavenge air temperature trend
Type-general inspection and maintenance points for this equipment category — not model-specific.
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Equipment Model #38804
· ✓ still in production