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Wärtsilä

6L46F

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

Technical data from manufacturer or class sources · not yet verified by a person
6,840 kWPower
6Cylinders
460 mmBore
580 mmStroke
600 rpmMCR RPM

The Wärtsilä 6L46F is a medium‑speed, four‑stroke diesel main engine delivering up to 6 840 kW at 600 rpm, known for its high power density per cylinder and flexible fuel capability.

Specifications

Technical data.reference — unverified

Hubraum pro Zylinder96,4 Liter
Leistung pro Zylinder (46F)1200 kW @ 600 rpm
SFOC (Specific Fuel Oil Consumption)170-173 g/kWh ISO
Ventile2 Einlassventile, 2 Auslassventile pro Zylinder
KraftstoffeinspritzungDirekte Einspritzung (Twin-Pump)
AufladungTurbolader mit Ladeluftkühlung
Betriebsstunden Feldhistorie7.200.000+ Stunden seit 2004
Gewicht 6L4695 Tonnen
Gewicht 12V46F177 Tonnen
Gewicht 16V46214 Tonnen
Rated power7 200 kW
Dimensions (mm) and weights (tonnes)8 430 mm
Weight97 tonnes
Cylinder output1200 kW
Engine speed600 rpm
Engine output7200 kW
Mean effective pressure2.49 MPa
Combustion air system Flow at 100% load12.6 kg/s
Temperature at turbocharger intake, max. (TE 600)45 °C
Temperature after air cooler, nom. (TE 601)50 °C
Exhaust gas system Flow at 100% load13.08 kg/s
Exhaust gas system Flow at 85% load11.16 kg/s
Exhaust gas system Flow at 75% load10.44 kg/s
Exhaust gas system Flow at 50% load6.96 kg/s
Exhaust gas system Temp. after turbo, 100% load (TE 517)364 °C
Exhaust gas system Temp. after turbo, 85% load (TE 517)336 °C
Exhaust gas system Temp. after turbo, 75% load (TE 517)338 °C
Exhaust gas system Temp. after turbo, 50% load (TE 517)356 °C
Calculated pipe diameter for 35 m/s924 mm
Heat balance at 100% load Jacket water, HT-circuit912 kW
Heat balance at 100% load Charge air, HT-circuit1542 kW
Heat balance at 100% load Charge air, LT-circuit786 kW
Heat balance at 100% load Lubricating oil, LT-circuit732 kW
Heat balance at 100% load Radiation210 kW
Fuel system Pressure before injection pumps (PT 101) at 85% load900...950 kPa
SFOC at 75% load (LFO)181.1 g/kWh
SFOC at 50% load (LFO)183.1 g/kWh
Pressure before bearings, nom. (PT 201)500 kPa
Pressure after pump, max.800 kPa
Suction ability main pump, including pipe loss, max.40 kPa
Prelubricating pressure, nom. (PT 201)80 kPa
Temperature before bearings, nom. (TE 201)56 °C
Temperature after engine, approx.75 °C
Pump capacity (main), engine driven191 m3/h
Pump capacity (main), electrically driven191 m3/h
Oil flow through engine130 m3/h
Prelubricating pump capacity (50/60Hz)35 m3/h
Oil tank volume in separate system, min13.0 m3
Oil consumption at 100% load, approx.0.7 g/kWh
Crankcase ventilation flow rate at full load1350 l/min
Crankcase ventilation backpressure, max.0.4 kPa
Oil volume in turning device9.5 l
Oil volume in speed governor1.7 l
Pressure at engine, after pump, nom. (PT 401)250 + static kPa
Pressure at engine, after pump, max. (PT 401)530 kPa
Temperature before cylinders, approx. (TE 401)74 °C
Temperature after charge air cooler, nom. (TE432)91...95 °C
Starting air system (Note 6) Pressure, nom. (PT 301)3000 kPa
Pressure at engine during start, min. (20°C) (PT 301)1500 kPa
Pressure at engine during start, max. (20°C) (PT 301)3000 kPa
Low pressure limit in air vessels1800 kPa
Consumption per start at 20°C (successful start)6.0 Nm3
Consumption per start at 20°C, (with slowturn)7.0 Nm3
Pump [kW]45
Electric motor [kW]55
Water inlet flow rate(l/min)24 l/min
Water consump-tion/wash (l)240 l
Speed600 rpm
Frequency30 Hz
MX [kNm]67 kNm
A [mm]1050
B [mm]2100
Engine type6L46F
X8330 1) mm
H5050 mm
Weights without flywheel [ton]97 ton
Engine3.3
Lifting device6.4
Transport cradle3.2
Manufacturer documentation

Images from manufacturer documentation.

Photos, drawings and page previews from this model’s datasheet or catalog.

The Wärtsilä 6L46F is a marine engine designed for efficient propulsion in various marine applications.

Features

  • low fuel consumption
  • variable speed capability

Options

  • CPP Variable Speed
  • CPP Constant Speed
  • DE Constant Speed

Standards

  • ISO 15550
Source: Wärtsilä 6L46F datasheet, p. 22
Wärtsilä 6L46F – Drawing (4f192ecd4d1c_S11-194 S. 12)
Drawing · 4f192ecd4d1c_S11-194 · S. 12
Wärtsilä 6L46F – Drawing (4f192ecd4d1c_S11-194 S. 13)
Drawing · 4f192ecd4d1c_S11-194 · S. 13
Wärtsilä 6L46F – Drawing (4f192ecd4d1c_S11-194 S. 15)
Drawing · 4f192ecd4d1c_S11-194 · S. 15
Wärtsilä 6L46F – Page preview (4f192ecd4d1c_S11-194 S. 11)
Page preview · 4f192ecd4d1c_S11-194 · S. 11
Wärtsilä 6L46F – Page preview (4f192ecd4d1c_S11-194 S. 14)
Page preview · 4f192ecd4d1c_S11-194 · S. 14
Wärtsilä 6L46F – Page preview (4f192ecd4d1c_S11-194 S. 16)
Page preview · 4f192ecd4d1c_S11-194 · S. 16
Wärtsilä 6L46F – Page preview (4f192ecd4d1c_S11-194 S. 17)
Page preview · 4f192ecd4d1c_S11-194 · S. 17
Source: Wärtsilä 6L46F datasheet, p. 21
Inspection

Inspector Detail

Common issues

  • Cylinder liner bore polishing or scuffing from poor HFO combustion or incorrect lube oil BN
  • Exhaust valve burning or seat recession from high thermal load
  • Turbocharger fouling and bearing wear from HFO soot deposits
  • Fuel injection equipment wear (plunger/nozzle) from HFO abrasives if fuel treatment is inadequate
  • Piston ring sticking or collapse from carbon buildup on poor-quality fuel
  • Charge air cooler fouling reducing power output
  • Crankcase oil contamination from liner blow-by on worn units
  • Common-rail accumulator or high-pressure pump wear

Inspection checklist

  • Cylinder liner bore inspection (scuffing, polishing, wear pattern) via borescope
  • Exhaust valve seat condition and rotation check
  • Exhaust gas temperature spread between cylinders
  • Turbocharger boost pressure and speed vs load
  • Piston ring and groove wear at overhaul
  • Fuel injection equipment wear check (plunger, nozzle spray pattern)
  • Lube oil analysis (BN depletion, wear metals, insolubles)
  • Charge air cooler pressure drop
  • Crankshaft deflection readings
  • HFO fuel treatment plant performance (centrifuge, viscosity control)

Service intervals

Lube oil analysisevery 500 h or per the manufacturer's schedule, more frequent on HFO
Fuel injection equipment overhaultypically 8000-12000 h depending on fuel quality - confirm against the manufacturer's schedule
Exhaust valve overhaultypically 8000-16000 h depending on load and fuel - confirm against the manufacturer's schedule
Turbocharger cleaning/inspection2000-4000 h running clean, full overhaul per the manufacturer's TBO
Piston/liner inspectionat major overhaul, typically every 12000-16000 h - confirm against the maintenance plan
Crankshaft deflection checkat each major overhaul or per class requirement

Typical wear limits

Cylinder liner weartypically 0.03-0.08 mm per 1000 h for this bore class on well-treated HFO - confirm against the engine's own manual
Piston ring end gaptypically 1.5-3.0 mm for a 460 mm bore class - confirm against the manufacturer's manual
Main/big-end bearing clearancetypically 0.30-0.55 mm depending on shell design at this bore size - check the manufacturer's limits
Exhaust valve seat recessioncondemning limit is engine-specific; track the trend against baseline rather than a single reading - confirm against the manufacturer's manual

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

  • Piston ring set (this bore/family)
  • Cylinder liner
  • Exhaust valve and seat set
  • Fuel injection nozzles
  • Turbocharger repair kit (bearings, nozzle ring)
  • Cylinder head gasket
  • Main/big-end bearing shells
  • Charge air cooler element

Safety

  • High-pressure common-rail fuel system remains pressurised after shutdown - depressurise per the manufacturer's procedure before opening
  • HFO handling - hot fuel lines under pressure carry a burn risk from leaks
  • Crankcase explosion risk - observe the cool-down period before opening crankcase doors after a bearing-temperature alarm
  • Heavy rotating and reciprocating masses at low rpm - lock out before entering the crankcase
  • Starting air system holds stored pressure - isolate and vent before maintenance
  • Hot exhaust manifold and turbocharger surfaces

Class survey

Normally surveyed under Continuous Survey Machinery (CSM) with class crediting the owner's planned maintenance system; expect focus on crankshaft deflection records, cylinder condition (liner/piston/valve) trending, turbocharger overhaul records, and governor/overspeed and safety trip testing at survey.

Estimated lifetime: Medium-speed Wartsila 46-class engines are commonly operated to 32,000-40,000 h between major overhauls under good fuel and maintenance conditions, with total service life well beyond 100,000 h achievable through successive overhauls; actual intervals depend on load factor and fuel quality.

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