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Wärtsilä
8LW31-GS-50Hz
The Wärtsilä 8LW31‑GS‑50Hz is an 8‑cylinder, medium‑speed (750 rpm) four‑stroke diesel generator set delivering about 2.24 MW of electrical power at 50 Hz, designed for shipboard auxiliary service.
2360.0 kW
Power
Engine Specifications
8
Cylinders
310 mm
Bore
430 mm
Stroke
4-stroke
Stroke Type
Components & Design
Component data being added…
Technical Data
Cylinder power
610 kW/cyl (diesel)
Mean effective pressure (BMEP)
30 bar
SFOC (diesel)
167.7 g/kWh (optimal point)
Weight (8V31)
~57.1 tonnes (dry, diesel)
Weight (16V31)
~89–92.5 tonnes (dry, diesel)
Piston speed
10.75 m/s
Turbocharging
Two-stage turbocharging with intercooling
Fuel injection
Common rail direct injection
Valve layout
2 inlet, 2 exhaust valves per cylinder
power kw
2360
rpm
750
fuel type
HFO/MDO
configuration
L
genset kw
2242
genset kva
2802
frequency hz
50
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Common failures & inspection points
Low-load operation: Poor combustion, carbon deposit accumulation in cylinders, turbocharger fouling, economizer fouling. Wärtsilä offers Slow Steaming Upgrade K
Cylinder liner wear and scuffing (general 4-stroke diesel pattern, not W31-specific): Exacerbated by inadequate lubrication oil film, excessive cylinder tempera
Fuel injection system: Common rail system generally robust; however, HP fuel pump overhaul intervals are extended to 24,000 hrs (vs. 12,000 in prior-gen engines
Scavenge space deposit accumulation and fire risk (class-wide diesel phenomenon): Carbonized lube oil and unburnt fuel residues accumulate in scavenge space. Ex
Type-general inspection and maintenance points for this equipment category — not model-specific.
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Equipment Model #124648
· ✓ still in production