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Wärtsilä
7LW38B
The Wärtsilä 7LW38B is a medium‑speed, 4‑stroke trunk piston main engine delivering about 3 640 kW at 600 rpm in a compact L‑configuration, designed for direct‑drive or reduction‑gear applications on commercial vessels.
3640.0 kW
Power
Engine Specifications
7
Cylinders
380 mm
Bore
475 mm
Stroke
4-stroke
Stroke Type
Components & Design
Component data being added…
Technical Data
Mean Effective Pressure (MEP)
2.7 MPa
Mean Piston Speed
9.5 m/s
Power per Cylinder
660–725 kW
Piston Displacement per Cylinder
53.9 liters
Valves per Cylinder
2 inlet + 2 exhaust
Engine Speed Class
Medium-speed (600 rpm)
Weight Range
90–200 tons (6L38 to 16V38)
Cylinder Bore Class
400 mm class
power kw
3640
rpm
600
fuel type
HFO/MDO
configuration
L
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Common failures & inspection points
Cold Corrosion of Cylinder Liners - Sulfuric acid formation from fuel sulfur content when liner temperatures fall below acid dew point; piston ring sticking in
Cylinder Liner Wear & Piston Ring Degradation - Chrome coating peeling from low residual alkalinity (BN) in cylinder oil; groove sticking allows combustion gas
Turbocharger Overhaul Cycle - Major service required every ~50,000 operating hours; rotating parts replacement mandatory; compressor wheel subject to foreign ob
Exhaust Valve Seat Recession - Gradual erosion of valve seat from combustion temperatures and abrasive exhaust gas erosion; valve sinks progressively deeper; de
Shaft Seal & Main Bearing Wear - Stern tube bearing clearance degradation from extended service; shaft seals subject to silt/sand ingestion in coastal/river ser
Type-general inspection and maintenance points for this equipment category — not model-specific.
Suppliers & Spare Parts
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Equipment Model #123162
· ✓ still in production
Wer liefert dieses Teil? 194 Betriebe im Verzeichnis · 15 aus Herstellerlisten
Chongqing Chuanqing Marine Power Equipment Co., Ltd.
Chongqing, China
FM-Power Serviços e Peças
Rio de Janeiro, Brazil
MARE Supply & Services
Haarlem, Netherlands
Marine Ecology Equipment OÜ
Tallinn, Estonia
OSM International
Miami, United States
Qinhuangdao Hy Marine Machinery Equipment Co., Ltd.
Qinhuangdao, China
World Marine Automation System
Busan, South Korea
2K Shipping & Trading Ltd
Kayaboyun, Turkey
A & D Sales Ltd
Skelmersdale, United Kingdom
ALME MARINE SA
Greece
ANEXUS
Barcelona, Spain
Abhi Marine Pvt. Ltd.
Mumbai, India
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