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Library Engine Room Main Engines (4-Stroke) Main Engine 4-Stroke Wärtsilä 31
Wärtsilä

31

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

Data sheet on file · key figures checked
8L-16VCylinders
310 mmBore
MDO/HFO/LNG depending variantMedium
Specifications

Technical data.verified

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

Cylinder power610 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 speed10.75 m/s
TurbochargingTwo-stage turbocharging with intercooling
Fuel injectionCommon rail direct injection
Valve layout2 inlet, 2 exhaust valves per cylinder
Speed (rpm)720/750
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Service

Service notes.

What our service work and the manufacturer documentation say about keeping this model running.

Service notes

Follow OEM condition-based maintenance. Typical medium-speed 4-stroke inspections include valve gear, injectors and turbocharger checks at running-hour intervals defined by Wärtsilä service schedule.

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