Cat C18 ACERT Tier 3

Commercial propulsion engines

About the Cat C18 ACERT Tier 3


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 Rating
Power Range 469-1001 bhp (350-747 bkW)
Engine Specifications
Speed Range 1800-2300 rpm
Emissions EPA Tier 3 Commercial, IMO II, EU IW
Aspiration TA, TTA
Bore 5.7 in
Stroke 7.2 in
Displacement 1106 in³
Rotation from Flywheel End Counterclockwise
Configuration In-line 6, 4-Stroke-Cycle Diesel
Dimensions & Weights
Minimum Dry Weight 4000 lb
Minimum Length 73 in
Maximum Length 76 in
Minimum Height 47.2 in
Maximum Height 51.2 in
Minimum Width 44.6 in
Maximum Width 47.4 in


Separate Circuit Aftercooling System

Separate Circuit Aftercooling System
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

Cooling System

Cooling System
Heat exchanger and Keel cooled options for all ratings

Turbo Configurations

Turbo Configurations
Single turbo configurations for all ratings

Competitive size and weight

Competitive size and weight

Marine Certifications

Marine Certifications
All major MCS type approvals available from factory

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