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Power Range469-1001 bhp (350-747 bkW)
Speed Range1800-2300 rpm
EmissionsEPA Tier 3 Commercial, IMO II, EU IW
AspirationTA, TTA
The C18 ACERT marine propulsion engine has commercial application ratings of 475-725 mhp (469-715 bhp) at 1800-2100 rpm that meet U.S. EPA Tier 3, IMO II, and EU IW emissions regulations. In addition to meeting the stricter EPA Tier 3 emissions, this engine now offers a fresh water aftercooled option for the commercial propulsion and auxiliary engines and genset packages. From fishing to offshore and everything in between, you can be confident that we have the solution to fit your needs.


Power Range469-1001 bhp (350-747 bkW)
Speed Range1800-2300 rpm
EmissionsEPA Tier 3 Commercial, IMO II, EU IW
AspirationTA, TTA
Bore5.7 in (145 mm)
Stroke7.2 in (183 mm)
Displacement1106 in³ (18.1 l)
Rotation from Flywheel EndCounterclockwise
Minimum Dry Weight4000 lb (1814 kg)
Minimum Length73 in (1854 mm)
Maximum Length76 in (19312 mm)
Minimum Height47.2 in (1198 mm)
Maximum Height51.2 in (1300 mm)
Minimum Width44.6 in (1134 mm)
Maximum Width47.4 in (1204 mm)
ConfigurationIn-line 6, 4-Stroke-Cycle Diesel

Benefits and Features

C18 ACERT commercial propulsion engines now incorporate a separate circuit aftercooling system (SCAC) for all configurations with A through D ratings

EPA Tier 3 Compliant, IMO II and EU IWW compliant

Heat exchanger and Keel cooled options for all ratings

Single turbo configurations for all ratings

All major MCS type approvals available from factory

Standard Equipment

  • Separate circuit after-cooled (SCAC)
  • Open Crankcase Ventilation (OCV) system
  • Turbocharger, jacket water cooled
  • Turbocharger inlet, 152 mm (6 in) OD straight connection
  • Separate Circuit After-Cooling (SCAC) for both HEX and Keel cooled engines
  • Engine JW and SCAC Shell & Tube Heat Exchangers for HEX cooled engines
  • SCAC pump, gear driven, for HEX cooled engines only
  • Jacket water pump, gear driven
  • Sea water pump, bronze impeller, gear driven
  • SCAC and JW shunt tanks for maintaining proper pump inlet pressures
  • Water-cooled exhaust manifold & turbocharger
  • 152 mm (6 in) round flanged outlet
  • Flywheel Housing, SAE No. 0
  • Flywheel, 18 inch, 136 teeth
  • SAE standard rotation
  • SAE No. 1, Flywheel: 14 inch, 113 teeth
  • Front service simplex fuel system
  • Fuel transfer pump, gear driven
  • Manual fuel priming pump
  • Hybrid fuel line design
  • Front service simplex oil system
  • Center sump oil pan:
  • Front and top service oil filler locations
  • Front service dipstick
  • Oil pump, gear driven
  • Front support - adjustable
  • Poly-V groove for alternator drive
  • NOTE: There are no standard power take-offs available
  • Front damper guard
  • Front service engine
  • Common electrical bonding point
  • Engine does not ship with zinc components
  • Engine is certified to D2/E2 emissions cycles
  • Programmable low idle
  • WOSR (Wide Operating Speed Range) available for EPA Tier 3 - B and C Ratings
  • Adjustable High Idle (TEL) - EPA Tier 3 WOSR Ratings Only
  • Electronic diagnostics and fault logging
  • Engine and transmission monitoring (speed, temperature, pressure)
  • Electronic fuel/air ratio contro
  • Engine Protection Mode for extended ambient conditions - EPA Tier 3 Ratings Only
  • Torque Limiting functionality for WOSR ratings only
  • 70-pin customer connector
  • Three types of throttle inputs (primary/ secondary PWM, 0-5V, 4-20mA +/-

Optional Equipment

  • Dry Elbows
  • Water-Cooled Elbows
  • Flexible Fitting
  • Flange
  • Muffler
  • Muffler Spark Arresting
  • Air Inlet Adapter
  • Battery Chargers
  • Charging Alternators
  • Alternator Mounting Group
  • Ammeter
  • MECP I
  • Duplex Fuel Filters
  • Flexible Fuel Lines
  • Fuel Cooler
  • Primary Fuel Filters
  • Instrument Panels
  • OEM Wiring Harness
  • Engine to Engine Harness
  • Gauges
  • Transmission Sensors
  • Oil Level Sensor
  • Duplex Oil Filters
  • Transmission Oil Cooler
  • Sump Pump
  • Vibration Isolators
  • Front Support
  • Rear Support
  • Crankshaft Pulleys
  • Front Stub Shaft
  • Hydraulic Pump Drive Adapter
  • Front Enclosed Clutch
  • Marine Classification Society and SOLAS
  • Marine Classification Society and Fire Resistance
  • STARTING SYSTEM Electric Starting Motors - Single 24 Volt
  • Air Starting Motor
  • Air Start Accessories
  • Starting Aids - JW Heaters
  • Battery Sets - 24 Volt - Dry
  • Engine Protective Cover
  • Storage Preservation
  • Export Packing