OceanSphereENGINES

9LW26

Main Engine 4-Stroke · Main Engines (4-Stroke)

Class-certified type (DNV register) · technical data sheet not yet verified​‌⁠‍​​⁠‌​‍⁠⁠‍⁠‍⁠​‌​‌
9Cylinders
260 mmBore
320 mmStroke

The Wärtsilä 9LW26 is a medium‑speed, 4‑stroke trunk‑piston main engine delivering 1 755 kW at 1000 rpm, known for its robust L‑configuration and ability to run on HFO or MDO while meeting IMO Tier II emissions.

Specifications

Technical data.reference — unverified

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Displacement per cylinder17.0 liters
Mean Effective Pressure (MEP)25.5 bar (900 RPM) / 24.0 bar (1000 RPM)
Piston Speed9.6 m/s (900 RPM) / 10.7 m/s (1000 RPM)
SFOC (ISO conditions, 85% load)186-192 g/kWh
6L26 weight17.2 tons
8L26 weight21.9 tons
9L26 weight23.6 tons
12V26 weight29 tons
16V26 weight37.9 tons
Power per cylinder (325 kW/cyl)Consistent across all configurations
TurbochargingTurbocharged with intercooler (charge air cooler)
Emission StandardIMO Tier II (MARPOL 73/78 Annex VI)
Speed (rpm)1000
Fuel TypeHFO/MDO
ConfigurationL
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