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Wärtsilä

9L46F

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

Technical data from manufacturer or class sources · not yet verified by a person​​‍‌‍​​⁠⁠‍⁠‌​​⁠‍‌⁠‌⁠
10,260 kWPower
9Cylinders
460 mmBore
580 mmStroke
600 rpmMCR RPM

The Wärtsilä 9L46F is a medium‑speed, nine‑cylinder, four‑stroke marine diesel engine delivering up to 10 260 kW at 600 rpm, distinguished by its high power density per cylinder and common‑rail fuel injection system.

Specifications

Technical data.reference — unverified

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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 power10 800 kW
Dimensions (mm) and weights (tonnes)10 900 mm
Weight140 tonnes
Cylinder output1200 kW
Engine speed600 rpm
Engine output10800 kW
Mean effective pressure2.49 MPa
Flow at 100% load18.9 kg/s
Temperature at turbocharger intake, max.45 °C
Temperature after air cooler, nom.50 °C
Flow at 85% load16.74 kg/s
Flow at 75% load15.66 kg/s
Flow at 50% load10.44 kg/s
Temp. after turbo, 100% load364 °C
Temp. after turbo, 85% load336 °C
Temp. after turbo, 75% load338 °C
Temp. after turbo, 50% load356 °C
Calculated pipe diameter for 35 m/s1132 mm
Jacket water, HT-circuit1368 kW
Charge air, HT-circuit2313 kW
Charge air, LT-circuit1179 kW
Lubricating oil, LT-circuit1098 kW
Radiation315 kW
Pressure before injection pumps (PT101) at 85% load -HFO900...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 driven253 m3/h
Pump capacity (main), electrically driven253 m3/h
Oil flow through engine190 m3/h
Prelubricating pump capacity (50/60 Hz)50 m3/h
Oil tank volume in separate system, min19.0 m3
Oil consumption at 100% load, approx.0.7 g/kWh
Crankcase ventilation flow rate at full load1800 l/min
Crankcase ventilation backpressure, max.0.4 kPa
Oil volume in turning device70.0 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)9.0 Nm3
Consumption per start at 20°C, (with slowturn)10.0 Nm3
Pump [kW]60
Electric motor [kW]75
Weight [kg]960
Water inlet flow rate(l/min)37 l/min
Speed600 rpm
Frequency45 Hz
MX [kNm]185 kNm
Weights without flywheel [ton]140 ton
Engine3.3
Lifting device9.6
Transport cradle3.5
X10790 2) mm
Manufacturer documentation

Images from manufacturer documentation.

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

The Wärtsilä 9L46F is a marine engine designed for efficient propulsion in various marine applications.

Features

  • variable speed capability
  • constant speed operation

Options

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

Standards

  • ISO 15550
Source: Wärtsilä 9L46F datasheet, p. 31
Wärtsilä 9L46F – Drawing (f2165295e668_S11-194 S. 12)
Drawing · f2165295e668_S11-194 · S. 12
Wärtsilä 9L46F – Drawing (f2165295e668_S11-194 S. 13)
Drawing · f2165295e668_S11-194 · S. 13
Wärtsilä 9L46F – Drawing (f2165295e668_S11-194 S. 15)
Drawing · f2165295e668_S11-194 · S. 15
Wärtsilä 9L46F – Page preview (f2165295e668_S11-194 S. 11)
Page preview · f2165295e668_S11-194 · S. 11
Wärtsilä 9L46F – Page preview (f2165295e668_S11-194 S. 14)
Page preview · f2165295e668_S11-194 · S. 14
Wärtsilä 9L46F – Page preview (f2165295e668_S11-194 S. 16)
Page preview · f2165295e668_S11-194 · S. 16
Wärtsilä 9L46F – Page preview (f2165295e668_S11-194 S. 17)
Page preview · f2165295e668_S11-194 · S. 17
Source: Wärtsilä 9L46F datasheet, p. 29
Inspection

Inspector Detail

Common issues

  • Cylinder liner bore polishing or wear increasing lube oil consumption
  • Exhaust valve burning from poor combustion or fuel quality issues
  • Turbocharger fouling on the compressor and turbine side reducing efficiency
  • Fuel injection pump or injector wear causing cylinder-to-cylinder load imbalance
  • Piston ring sticking from combustion deposits when firing HFO
  • Main and big-end bearing wear over long service periods
  • Charge air cooler fouling reducing available power

Inspection checklist

  • Exhaust gas temperature deviation between cylinders (per OEM, a spread beyond the maker's stated threshold indicates injector or valve trouble)
  • Turbocharger speed and boost pressure trend
  • Cylinder liner wear measurement
  • Piston ring and land condition at overhaul
  • Main and big-end bearing clearance
  • Crankshaft deflection readings
  • Fuel injection equipment condition
  • Charge air cooler cleanliness on air and water sides
  • Governor and overspeed trip function test

Service intervals

Crankshaft deflection checktypically annual, per class Continuous Survey Machinery scheme
Cylinder head/piston inspectioncommonly in the 12,000-16,000 running hour range depending on fuel and load factor - confirm against Wartsila's maintenance manual for the 46F
Turbocharger overhaulcommonly every 16,000-24,000 running hours
Fuel injection pump/injector overhaultypically every 8,000-12,000 running hours
Lube oil analysisevery 500-1,000 running hours

Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.

Typical wear limits

Cylinder liner diametral wearclass societies and Wartsila typically set renewal limits in the region of 0.3-0.6 mm for this bore class, but the applicable figure must be taken from the engine's own maintenance manual and the vessel's classification rules rather than assumed
Main bearing clearanceassessed against the limits stated in the 46F maintenance manual, not a fixed generic value
Piston ring gapmanufacturer-specified; monitor by trend rather than against a single number

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

Critical spares

  • Piston complete assembly
  • Cylinder liner
  • Exhaust valve and seat ring
  • Fuel injection pump element
  • Injector nozzle
  • Main and big-end bearing shells
  • Turbocharger cartridge/bearing set

Safety

  • High-pressure fuel injection system hazards
  • Crankcase explosion risk - oil mist detector maintenance is critical on this engine size
  • Hot turbocharger and exhaust manifold surfaces
  • Heavy rotating components during piston/liner extraction at overhaul
  • HFO heating and handling precautions
  • Starting air system pressure hazards

Class survey

Falls under Continuous Survey Machinery; class typically reviews crankshaft deflection records, running hours and overhaul history since the last major inspection, oil mist detector and overspeed trip test records, and turbocharger condition at each survey window.

Estimated lifetime: Engines of this class are commonly specified for a major overhaul interval in the piston/liner range of roughly 16,000-24,000 hours, with overall service life well in excess of 100,000 running hours under proper maintenance - this is an order-of-magnitude figure, not a manufacturer commitment, and depends heavily on fuel quality and load profile.

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