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C18 ACERT IMO II

The C18 ACERT marine propulsion engine has commercial application ratings of 454-715 bhp that meet IMO II & EU Stage IIA emissions regulations, and 469-715 bhp that meet EPA Tier 3, IMO II and EU Stage IIIA emissions regulations. In addition to the benefits the C18 ACERT's advanced marine engine technology brings, you welcome aboard legendary Cat product support. No matter where your spirit of adventure takes you, rest assured the Cat Dealer Network is close by.
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      Benefits & Features

      Cooling System

      Heat exchanger and Keel cooled options for all ratings

      Emissions

      IMO II and EU IWW compliant for all ratings

      Separate Circuit Aftercooling System

      The primary advantage of the separate circuit aftercooling system (SCAC) is that no sea water circulates through the aftercooler.

      Additional Ratings

      Specific ratings are available that meet IMO II emissions regulations and additional ratings are available that meet both EPA Tier 3 and IMO II emissions regulations.

      specifications

      Power Rating
      Power Range 454-715 bhp (339-533 bkW)
      Engine Specifications
      Speed Range 1800-2100 rpm
      Emissions IMO II, EU IIIA
      Aspiration TA, TTA
      Bore 145.0 mm
      Stroke 183.0 mm
      Displacement 18.1 l
      Rotation from Flywheel End Counterclockwise
      Configuration In-line 6, 4-Stroke-Cycle Diesel
      Dimensions & Weights
      Minimum Dry Weight 1814.0 kg
      Minimum Length 1854.0 mm
      Maximum Length 19312.0 mm
      Minimum Height 1198.0 mm
      Maximum Height 1300.0 mm
      Minimum Width 1134.0 mm
      Maximum Width 1204.0 mm
      Maximum Dry Weight 1950 kg

      Standard Equipment

      Air Inlet System
      • Separate circuit after-cooled (SCAC)
      • Open Crankcase Ventilation (OCV) system
      • Turbocharger, jacket water cooled
      • Turbocharger inlet, 152 mm (6 in) OD straight connection
      Cooling System
      • 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
      Exhaust System
      • Water-cooled exhaust manifold & turbocharger
      • 152 mm (6 in) round flanged outlet
      Flywheels & Flywheel Housings
      • Flywheel Housing, SAE No. 0
      • Flywheel, 18 inch, 136 teeth
      • SAE standard rotation
      • SAE No. 1, Flywheel: 14 inch, 113 teeth
      Fuel System
      • Front service simplex fuel system
      • Fuel transfer pump, gear driven
      • Manual fuel priming pump
      • Hybrid fuel line design
      Lube System
      • Front service simplex oil system
      • Center sump oil pan: Deep; 500 hour oil change interval, Shallow; 250 hour oil change interval
      • Front and top service oil filler locations
      • Front service dipstick
      • Oil pump, gear driven
      Mounting System
      • Front support - adjustable
      Power Take-Offs
      • Poly-V groove for alternator drive
      • NOTE: There are no standard power take-offs available
      General
      • 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
      • Certified to IMO II Marine Commercial Propulsion (E3) Cycle Emission Standards
      • Certified to EU Stage IIIA AND CCNR Stage II (E3 Cycle) Emissions Standards.
      • NOTE: Ratings listed below can also be used in Recreational / Pleasure Craft applications.
      Control System
      • 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

      Exhaust System
      • Dry Elbows
      • Water-Cooled Elbows
      • Flexible Fitting
      • Flange
      • Muffler
      • Muffler Spark Arresting
      Air Inlet System
      • Air Inlet Adapter
      Charging System
      • Battery Chargers
      • Charging Alternators
      • Alternator Mounting Group
      • Ammeter
      Control System
      • MECP I
      • Caterpillar Alarm System and Protection
      Cooling System
      • AUX Expansion Tank Flange Kit
      Fuel System
      • Duplex Fuel Filters
      • Flexible Fuel Lines
      • Fuel Cooler
      • Primary Fuel Filters
      Instrumentation
      • Instrument Panels: Marine Power Display, Color Marine Power Display, Color MPD Dual Display Harness, MPD Wiring Connection Kit
      • OEM Wiring Harness
      • Engine to Engine Harness
      • Gauges
      • Transmission Sensors
      • Oil Level Sensor
      Lube System
      • Duplex Oil Filters
      • Transmission Oil Cooler
      • Sump Pump
      Mounting System
      • Vibration Isolators
      • Front Support
      • Rear Support
      Power Take-Offs
      • Note: PTO Options Require Torsional Vibration Analysis
      • Crankshaft Pulleys
      • Front Stub Shaft
      • Hydraulic Pump Drive Adapter
      • Front Enclosed Clutch
      Protection System
      • 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

      Download resources

      Product specifications, standard and optional equipment may vary depending on stock availability. For more information or to verify specific product details, please get in touch with one of our sales representatives.

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