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C18 ACERT IMO II

Commercial Propulsion Engines

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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Power Range 454-715 bhp (339-533 bkW)
Speed Range 1800-2100 rpm
Emissions IMO II, EU IIIA
Aspiration TA, TTA
Availability Contact Dealer
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C18 ACERT IMO II
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FEATURES & BENEFITS

Cooling System

Heat exchanger and Keel cooled options for all ratings Read more

Emissions

IMO II and EU IWW compliant for all ratings Read more

Separate Circuit Aftercooling System

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

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. Read more

SPECIFICATIONS FOR C18 ACERT IMO II

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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 mm
Stroke 183 mm
Displacement 18.1 l
Rotation from Flywheel End Counterclockwise
Configuration In-line 6, 4-Stroke-Cycle Diesel
Dimensions & Weights
Minimum Dry Weight 1814 kg
Minimum Length 1854 mm
Maximum Length 19312 mm
Minimum Height 1198 mm
Maximum Height 1300 mm
Minimum Width 1134 mm
Maximum Width 1204 mm
Maximum Dry Weight 1950 kg

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Speed Range 1600-2300 rpm
Emissions IMO II, EU IW
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Power Range 10800 - 15440 kW
Speed Range 500 / 514 rpm
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C280-12 Tier 4/ IMO III

Power Range 4962-5444 bhp (3700-4060 bkW)
Speed Range 1000 rpm
Emissions EPA Tier 4, IMO II
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C32 Tier 3 / IMO II

Power Range 61-1450 bhp (46-1072 bkW)
Emissions U.S. EPA Tier 3 / IMO II emissions certified
Aspiration Turbocharged-aftercooled aspiration
Bore 145 mm
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Power Range 1100-2250 bhp (820-1678 bkW)
Speed Range 1200-1925 rpm
Emissions IMO I
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3512E Tier 4 / IMO III

Power Range 1341-2549 bhp (1000-1901 bkW)
Speed Range 1600-1800 rpm
Emissions U.S. EPA Tier 4 Final, IMO III
Aspiration TTA
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C12

Power Range 340-490 bhp (254-366 bkW)
Speed Range 1800-2300 rpm
Emissions IMO I, IMO II
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3508C

Power Range 775-1100 bhp (578-820 bkW)
Speed Range 1200-1600 rpm
Emissions IMO II, EU IW
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