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.
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.
C18 ACERT IMO II 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