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Wärtsilä
9LW32E
The Wärtsilä 9LW32E is a medium‑speed, 9‑cylinder, four‑stroke diesel engine delivering 3 150 kW at 750 rpm, designed for main propulsion with high power density and flexible fuel capability.
3150.0 kW
Power
Engine Specifications
9
Cylinders
320 mm
Bore
400 mm
Stroke
4-stroke
Stroke Type
Components & Design
Component data being added…
Technical Data
Displacement per cylinder
32.2 liters
Specific power output (inline)
580 kW/cylinder (at 750 RPM)
Specific power output (V-config)
500-420 kW/cylinder (W32GD: 405-420 kW/cyl)
Configuration
4-stroke, non-reversible, turbocharged, intercooled, direct fuel injection
Valves per cylinder
2 inlet + 2 exhaust
Cooling system
Seawater and freshwater cooling; charge air cooling via cooler
Turbocharger
Napier 357 (common); Wärtsilä turbocharger safety package available
Compliance
IMO Tier II (MARPOL 73/78 Annex VI)
power kw
3150
rpm
750
fuel type
HFO/MDO
configuration
L
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Common failures & inspection points
Injection pump fuel rack stickiness (HFO operation) - reported in power plants using HFO 380, affecting reliable fuel delivery
Exhaust valve seat wear and carbon deposits - standard maintenance item due to high exhaust temperatures; valve seats made from Ni-Cr super alloy (ASTM A560 60C
Camshaft gear backlash and timing gear pitting/spalling - wear surfaces require monitoring during major overhauls
Bearing shell installation alignment critical - tin-aluminium-on-chrome-iron tribological pairing; 110% overload limit for 1 hour in 12
Fuel injection nozzle clogging (dirt/debris, contaminated fuel) - HFO installations use oil-cooled nozzles; MDF uses non-cooled nozzles
Type-general inspection and maintenance points for this equipment category — not model-specific.
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Equipment Model #124187
· ✓ still in production