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Wärtsilä
10LW46 Methanol
The Wärtsilä 10LW46 Methanol is a medium‑speed, 4‑stroke trunk piston main engine delivering up to 6 500 kW at 600 rpm, capable of running on methanol or marine diesel oil (MDO) in dual‑fuel mode.
6500.0 kW
Power
Engine Specifications
10
Cylinders
460 mm
Bore
580 mm
Stroke
4-stroke
Stroke Type
Components & Design
Component data being added…
Technical Data
Cylinder power
610 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 speed
10.75 m/s
Turbocharging
Two-stage turbocharging with intercooling
Fuel injection
Common rail direct injection
Valve layout
2 inlet, 2 exhaust valves per cylinder
power kw
6500
rpm
600
fuel type
Methanol/MDO (Dual-Fuel)
configuration
L
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Common failures & inspection points
Low-load operation: Poor combustion, carbon deposit accumulation in cylinders, turbocharger fouling, economizer fouling. Wärtsilä offers Slow Steaming Upgrade K
Cylinder liner wear and scuffing (general 4-stroke diesel pattern, not W31-specific): Exacerbated by inadequate lubrication oil film, excessive cylinder tempera
Fuel injection system: Common rail system generally robust; however, HP fuel pump overhaul intervals are extended to 24,000 hrs (vs. 12,000 in prior-gen engines
Scavenge space deposit accumulation and fire risk (class-wide diesel phenomenon): Carbonized lube oil and unburnt fuel residues accumulate in scavenge space. Ex
Type-general inspection and maintenance points for this equipment category — not model-specific.
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Equipment Model #124036
· ✓ still in production