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6LW26

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

Class-certified type (DNV register) · technical data sheet not yet verified
1,170 kWPower
6Cylinders
260 mmBore
320 mmStroke

The Wärtsilä 6LW26 is a marine engine designed for power generation. Manufactured by Wärtsilä, this model operates on heavy fuel oil (HFO), marine diesel oil (MDO), and gas oil (GO) and delivers 1170 kW of power at 1000 RPM with a bore of 260 mm and stroke of 320 mm. Engineered to meet IMO Tier II emissions standards, it is turbocharged with an intercooler for efficient performance. Common maintenance issues include piston ring wear under low-load conditions, cylinder liner glazing due to polishing, and fuel injection nozzle coking, especially with high-sulphur fuels. Regular inspections and proper lubrication are crucial to prevent these failures.

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)
Power (kW)1170
Speed (rpm)1000
Fuel TypeHFO/MDO
ConfigurationL
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