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7LW32SG

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

Class-certified type (DNV register) · technical data sheet not yet verified
2,345 kWPower
7Cylinders
320 mmBore
400 mmStroke

Maintaining optimal performance and reliability are paramount considerations for any marine operation. The Wärtsilä 7LW32SG engine is designed with these factors in mind, offering robust construction and a focus on key areas prone to wear and tear. This 7-cylinder, 320mm bore, 400mm stroke engine boasts a power output of 2345kW at 750rpm, fueled by LNG (Spark-Ignited). Its 4-stroke configuration includes turbocharging, intercooling, and direct fuel injection for efficient power delivery. Common maintenance points include addressing stickiness in the fuel rack (especially during HFO operation), monitoring exhaust valve seat wear, and inspecting camshaft gear backlash and timing gear condition. Proper bearing shell installation alignment is crucial due to the tribological pairing of tin-aluminium-on-chrome-iron. Fuel injection nozzle clogging, stemming from dirt, debris, or contaminated fuel, is another area requiring attention, with different nozzle types used for HFO and MDF installations.

Specifications

Technical data.from datasheet

Every value below comes from the manufacturer datasheet or class-society record on file for this model.

Displacement per cylinder32.2 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)
Configuration4-stroke, non-reversible, turbocharged, intercooled, direct fuel injection
Valves per cylinder2 inlet + 2 exhaust
Cooling systemSeawater and freshwater cooling; charge air cooling via cooler
TurbochargerNapier 357 (common); Wärtsilä turbocharger safety package available
ComplianceIMO Tier II (MARPOL 73/78 Annex VI)
Power (kW)2345
Speed (rpm)750
Fuel TypeLNG (Spark-Ignited)
ConfigurationL
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Download datasheet (PDF) (27482 KB)
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