Marine Power Systems

Engine uptime is critical for you, your crew, your clients and your bottom line. That’s why Cat and MaK propulsion engines power your vessel to any port. The industry’s largest range of engines provide the reliability you need. Caterpillar Marine Power Systems ensure that you have an engine on board that will work as hard as you do. Select from our wide range of Commercial Propulsion Engines, High Performance Propulsion Engines, Marine Generators, and Auxiliary Engines.

Commercial Propulsion Engines

Long-term durability, high fuel efficiency, simplified service, and long-life-to-overhaul – Cat® marine engines provide maximum productivity with minimum outlay.

C7.1 Tier 3 / IMO II

C7.1 High Performance Propulsion Engine
  • Length
    43.1 in
  • Minimum Rating
    280 BHP
  • Height
    35.1 in
  • Maximum Rating
    425 BHP
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C9.3 ACERT

C9.3 ACERT Marine Propulsion Engine
  • Power Range
    375-476 bhp (280-355 bkW)
  • Speed Range
    1800-2300 rpm
  • Emissions
    EPA Tier 3 Commercial, IMO II, EU IW
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C12

C12 Commercial Propulsion Engines
  • Power Range
    340-490 bhp (254-366 bkW)
  • Speed Range
    1800-2300 rpm
  • Emissions
    IMO I, IMO II
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C18 ACERT IMO II

C18 ACERT IMO II
  • Power Range
    454-715 bhp (339-533 bkW)
  • Speed Range
    1800-2100 rpm
  • Emissions
    IMO II, EU IIIA
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C18 ACERT Tier 3

C18 ACERT Tier 3
  • Power Range
    469-1001 bhp (350-747 bkW)
  • Speed Range
    1800-2300 rpm
  • Emissions
    EPA Tier 3 Commercial, IMO II, EU IW
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C32 ACERT IMO II

C32 ACERT IMO II   Commercial Propulsion Engines
  • Power Range
    660-1450 bhp (492-1081 bkW)
  • Speed Range
    1600-2300 rpm
  • Emissions
    IMO II, EU IW
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C32 ACERT Tier 3

C32 ACERT IMO II   Commercial Propulsion Engines
  • Power Range
    750-1800 bhp (559-1342 bkW)
  • Speed Range
    1600-2300 rpm
  • Emissions
    EPA Tier 3, IMO II, EU IW
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C32 Tier 3 / IMO II

Cat C32 Marine Propulsion (US EPA 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
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C32 Tier 4 / IMO III

Cat C32 Marine Propulsion (US EPA Tier 4 / IMO III)
  • 6 Brick Z-Flow - Length
    147.7 in
  • Minimum Length
    83.9 in
  • 6 Brick Z-Flow - Height
    23.5 in
  • Maximum Length
    89.8 in
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3508C

3508C Commercial Propulsion Engines
  • Power Range
    775-1100 bhp (578-820 bkW)
  • Speed Range
    1200-1600 rpm
  • Emissions
    IMO II, EU IW
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3512C IMO II

3512C IMO II  Commercial Propulsion Engines
  • Power Range
    1280-2551 bhp (955-1902 bkW)
  • Speed Range
    1200 rpm, 1600 rpm, 1800 rpm
  • Emissions
    IMO II, EU IW
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3512C Tier 3

3512C Tier 3 Commercial Propulsion Engines
  • Power Range
    1340-2366 bhp (1000-1765 bkW)
  • Speed Range
    1600-1800 rpm
  • Emissions
    EPA Tier 3, IMO II
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3512E

3512E Marine Propulsion Engine (U.S. EPA Tier 4 Final / IMO III)
  • Power Range
    1341-2549 bhp (1000-1901 bkW)
  • Speed Range
    1600-1800 rpm
  • Emissions
    U.S. EPA Tier 4 Final, IMO III
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3516C IMO II

3516C Commercial  Commercial Propulsion Engines
  • Power Range
    1650-3386 bhp (1230-2525 bkW)
  • Speed Range
    1200-1800 rpm
  • Emissions
    IMO II
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3516C Tier 3

3516C T3 Commercial  Commercial Propulsion Engines
  • Power Range
    2131-2675 bhp (1590-1995 bkW)
  • Speed Range
    1600 rpm
  • Emissions
    EPA Tier 3, IMO II
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3516E

3516E Marine Propulsion Engine (U.S. EPA Tier 4 Final)
  • Power Range
    2501-3386 bhp (1865-2525 bkW)
  • Speed Range
    1600-1800 rpm
  • Emissions
    U.S. EPA Tier 4 Final, IMO III
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C175-16

C176-16 Marine Propulsion Engine
  • Power Range
    2683-3420 bhp (2001-2550 bkW)
  • Speed Range
    1600-1800 rpm
  • Emissions
    IMO II
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C280-6

C280-6 Commercial Propulsion Engines
  • Power Range
    2320-2722 bhp (1730-2030 bkW)
  • Speed Range
    900-1000 rpm
  • Emissions
    IMO II
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C280-8

C280-8 Commercial Propulsion Engines
  • Power Range
    3084-3393 bhp (2300-2530 bkW)
  • Speed Range
    900 rpm
  • Emissions
    IMO II
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C280-8 Tier 4

C280-8 Commercial Propulsion Engines
  • Power Range
    3299-3634 bhp (2460-2530 bkW)
  • Speed Range
    1000 rpm
  • Emissions
    EPA Tier 4, IMO III
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C280-12

C280-12 Commercial Propulsion Engines
  • Power Range
    4640-5096 bhp (3460-3800 bkW)
  • Speed Range
    900 rpm
  • Emissions
    IMO II
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C280-12 Tier 4

C280-12 Commercial Propulsion Engines
  • Power Range
    4962-5444 bhp (3700-4060 bkW)
  • Speed Range
    1000 rpm
  • Emissions
    EPA Tier 4, IMO II
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C280-16

C280-16 Commercial Propulsion Engines
  • Power Range
    6169-7577 bhp (4600-5650 bkW)
  • Speed Range
    900-1000 rpm
  • Emissions
    IMO II
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High Performance Propulsion and Maneuvering Solutions

With power requirements like never before, the success of every vessel depends on efficient, dependable, and powerful marine engine. Cat® engines satisfy worldwide emissions regulations and still deliver a surge of adrenaline whenever and wherever required.

C7.1

C7.1 High Performance Propulsion Engine
  • Power Range
    298 bkW - 373 bkW (400 bhp - 500 bhp)
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C9 ACERT

C9 ACERT  High Performance Propulsion Engines
  • Power Range
    503-567 bhp (375-423 bkW)
  • Speed Range
    2500 rpm
  • Emissions
    IMO II
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C12

C12 High Performance Propulsion Engines
  • Power Range
    578-609 mhp (570-600 bhp)
  • Speed Range
    2300 rpm
  • Emissions
    IMO I
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C12 ACERT

C12 ACERT High Performance
  • Power Range
    660-705 bhp (492-526 bkW)
  • Speed Range
    2300 rpm
  • Emissions
    IMO II
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C12.9

C12.9 High Performance Marine Propulsion Engine
  • Power Range
    850-1000 mhp, 838-985 bhp, 625-735 bkW
  • Speed Range
    2300 rpm
  • Emissions
    EPA Tier 3, IMO II, EU Stage IIIA
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C18 ACERT Tier 3

C18 ACERT Tier 3
  • Power Range
    814-1015 mhp, 803-1001 bhp, 599-747 bkW
  • Speed Range
    2100-2300 rpm
  • Emissions
    EPA Tier 3, IMO II, EU Stage IIIA
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C18 ACERT Tier 3 Recreational

C18 ACERT Tier 3 Recreational
  • Power Range
    1015-1150 mhp, 1001-1136 bhp, 747-847 bkW
  • Speed Range
    2300 rpm
  • Emissions
    EPA Tier 3, IMO II, EU IW
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C32 ACERT Tier 3 Recreational

C32 ACERT Tier 3 Recreational
  • Power Range
    1600-1900 bhp (1193-1417 bkW)
  • Speed Range
    2300 rpm
  • Emissions
    EPA Tier 3, IMO II, EU IW
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3512C HD

3512C HD High Performance
  • Power Range
    1340-2366 bhp (1000-1765 bkW)
  • Speed Range
    1600-1800 rpm
  • Emissions
    EPA Tier 3, IMO II
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Marine Generator Sets

Cat marine generator sets are built to provide dependable, efficient service under extreme conditions. They combine proven designs and manufacturing methods with the latest technology, such as advanced control, to deliver more power and greater efficiency, while offering enhanced monitoring.

C1.5

C1.5 Generator Set (Single Phase 1.0 pf)
  • Minimum Rating
    10 ekW (10 kVA)
  • Maximum Rating
    13 ekW (16.5 kVA)
  • Frequency
    50 Hz or 60 Hz
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C2.2

C2.2 (Single Phase)
  • Minimum Rating
    16 ekW (16kVA)
  • Maximum Rating
    27 ekW (27 kVA)
  • Frequency
    50 Hz or 60 Hz
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C4.4

C4.4 Genset  Marine Generator Sets
  • Minimum Rating
    36.0R ekW (45 kVA)
  • Maximum Rating
    99.0 ekW (123 kVA)
  • Frequency
    50 Hz or 60 Hz
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C4.4 ACERT

C4.4 ACERT Marine Generator Set
  • Minimum Rating
    58R ekW (50 Hz), 51R ekW (60 Hz)
  • Maximum Rating
    88R ekW (50 Hz), 105R ekW (60 Hz)
  • Frequency
    50 Hz or 60 Hz
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C7.1

C7.1 Generator Set
  • Minimum Rating
    100 ekW (125 kVA)
  • Maximum Rating
    200 ekW (250 kVA)
  • Frequency
    50 Hz or 60 Hz
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C9.3 Marine Generator Set

C9.3 ACERT Generator Set
  • Minimum Rating
    185R ekW (231 kVA) at 50hz, 224R ekW (280 kVA) at 60hz
  • Maximum Rating
    250R ekW (313 kVA) at 50hz, 300 ekW (375 kVA) at 60hz
  • Frequency
    50 Hertz & 60 Hertz
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C18 (SRMP) Marine Generator Set

C18 ACERT Tier 3
  • Minimum Rating
    260 ekW (325 kVA)
  • Maximum Rating
    565 ekW (706 kVA)
  • Frequency
    50 hz
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C32 ACERT IMO II

C32 ACERT IMO II
  • Minimum Rating
    550 eKW (688 kVA)
  • Maximum Rating
    940 ekW (1175 kVA)
  • Frequency
    50 Hz or 60 Hz
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C32 ACERT Tier 3

C32 ACERT Tier 3
  • Minimum Rating
    730 ekW (913 kVA)
  • Maximum Rating
    940 ekW (1175 kVA)
  • Frequency
    60hz
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C32 Tier 3 / IMO II

Cat C32 Marine Generator Set (US EPA Tier 3 / IMO II)
  • Minimum Rating
    219 ekW
  • Maximum Rating
    940 ekW
  • Frequency
    60hz
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C32 IMO III

Cat C32 Marine Generator Set (IMO III)
  • Minimum Rating
    219 ekW
  • Maximum Rating
    940 ekW
  • Frequency
    60hz
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3512C

3512C Generator Set
  • Minimum Rating
    1550 eKW (1937 kVA)
  • Maximum Rating
    1700 eKW (2125 kVA)
  • Frequency
    60 hz
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C280-6

C280-6
  • Minimum Rating
    1760 ekW (2200 kVA)
  • Maximum Rating
    1820 ekW (2275 kVA)
  • Frequency
    50 Hz or 60 Hz
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C280-8

C280-8
  • Minimum Rating
    2350 ekW (2938 kVA)
  • Maximum Rating
    2420 ekW (3025 kVA)
  • Frequency
    50 Hz or 60 Hz
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C280-12

C280-12
  • Minimum Rating
    3520 ekW (4400 kVA)
  • Maximum Rating
    3640 ekW (4550 kVA)
  • Frequency
    50 Hz or 60 Hz
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C280-16

C280-16
  • Minimum Rating
    4700 ekW (5875 kVA)
  • Maximum Rating
    4840 ekW (6050 kVA)
  • Frequency
    50 Hz or 60 Hz
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Auxiliary Engines

Cat® marine auxiliary engines are the solution for unique generator set applications requiring a custom approach. Additionally, the are perfectly engineered for electrically driven pumps, winches, conveyors and thrusters.

C7.1 Tier 3 / IMO II

C7.1 High Performance Propulsion Engine
  • Length
    43.1 in
  • Power Range
    208 bkW (280 bhp) @ 2300 rpm
  • Configuration
    In-line 6, 4-stroke-cycle diesel
  • Height
    35.1 in
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C9.3 Auxiliary Engine

C9.3 Generator Set Engine/Auxiliary
  • Minimum Rating
    292 BHP
  • Maximum Rating
    436 BHP
  • Aspiration
    TA
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C18 IMO II

C18 IMO II
  • Minimum Rating
    404 BHP
  • Maximum Rating
    660 BHP
  • Aspiration
    TA, TTA
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C18 Tier 3

C18 Tier 3
  • Minimum Rating
    624 BHP
  • Maximum Rating
    803 BHP
  • Aspiration
    TA, TTA
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C32 IMO II

C32 IMO II
  • Minimum Rating
    791 BHP
  • Maximum Rating
    1333 BHP
  • Aspiration
    TTA
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C32 Tier 3

C32 Tier 3
  • Minimum Rating
    1047 BHP
  • Maximum Rating
    1333 BHP
  • Aspiration
    TTA
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C32 Tier 3 / IMO II

Cat C32 Auxiliary / Diesel Electric Propulsion (US EPA Tier 3 / IMO II)
  • Minimum Rating
    314 BHP
  • Maximum Rating
    1333 BHP
  • Aspiration
    Turbocharged-aftercooled aspiration
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C32 IMO III

Cat C32 Auxiliary / Diesel Electric Propulsion Engine (IMO III)
  • Minimum Rating
    352 BHP
  • Maximum Rating
    1172 BHP
  • Aspiration
    Turbocharged-aftercooled aspiration
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3512E

3512E Marine Auxiliary/DEP Engine (U.S. EPA Tier 4 Final / IMO III)
  • Aspiration
    TA
  • Power Range
    732-2399 bhp (546-1789 bkW)
  • Emissions
    U.S. EPA Tier 4 Final, IMO III
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3516E

3516E Marine Auxiliary/DEP Engine (U.S. EPA Tier 4 Final)
  • Aspiration
    TA
  • Power Range
    787-3175 bhp (587-2368 bkW)
  • Emissions
    U.S. EPA Tier 4 Final, IMO III
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C280

C280 Aux
  • Minimum Rating
    2320 BHP
  • Maximum Rating
    7268 BHP
  • Aspiration
    TA
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