Marine Engines

Caterpillar and MaK Engines

Cat Marine Propulsion Engines

Engine uptime is critical for you, your crew, your clients and your bottom line. That's why Cat marine 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.

Cat marine engine
C12 Commercial Marine Propulsion Engine

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Model Power Range Horsepower
C9.3 ACERT 280 to 355 bkW 375 to 476 BHP
C12 254 to 366 bkW 340 to 490 BHP
C18 ACERT IMO II 339 to 533 bkW 454 to 715 BHP
C18 ACERT TIER 3 350 to 747 bkW 469 to 1001 BHP
C32 ACERT IMO II 492 to 1081 bkW 660 to 1450 BHP
C32 ACERT TIER 3 559 to 1342 bkW 750 to 1800 BHP
3406C 272 to 298 bkW 365 to 400 BHP
3508C 578 to 820 bkW 775 to 1100 BHP
3512C IMO II 955 to 1902 bkW 1280 to 2551 BHP
3512C TIER 3 1000 to 1765 bkW 1340 to 2366 BHP
3512E 1000 to 1901 bkW 1341 to 2549 BHP
3516C IMO II 1230 to 2525 bkW 1650 to 3386 BHP
3516C TIER 3 1590 to 1995 bkW 2131 to 2675 BHP
3516E 1865 to 2525 bkW 2501 to 3386 BHP
C175-16 2001 to 2550 bkW 2683 to 3420 BHP
C280-6 1730 to 2030 bkW 2320 to 2722 BHP
C280-8 2300 to 2530 bkW 3084 to 3393 BHP
C280-8 TIER 4 2460 to 2530 bkW 3299 to 3634 BHP
C280-12 3460 to 3800 bkW 4640 to 5096 BHP
C280-12 TIER 4 3700 to 4060 bkW 4962 to 5444 BHP
C280-16 4600 to 5650 bkW 6169 to 7577 BHP

Cat 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.

Caterpillar auxiliary engine
Model Rating Aspiration
C9.3 292 to 436 BHP TA
C18 IMO II 404 to 660 BHP TA, TTA
C18 TIER 3 624 to 803 BHP TA, TTA
C32 IMO II 791 to 1333 BHP TTA
C32 TIER 3 1047 to 1333 BHP TTA
3512E 732 to 2399 BHP TA
3516E 787 to 3175 BHP TA
C280 2320 to 7268 BHP TA
C32 IMO III 352 to 1172 BHP TA
C32 TIEr 3/IMO II 314 to 1333 BHP TA

Cat 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.
Caterpillar auxiliary engine
Brand Model Rating
Cat C4.4 36 to 99 eKw
Cat C4.4 ACERT 51R to 105R eKw
Cat C7.1 100 to 200 eKw
Cat C9.3 224R to 300 eKw
Cat C32 IMO III 219 to 940 eKw
Cat C32 TIER 3/IMO II 219 to 940 eKw
Cat C32 550 to 940 eKw
Cat C32 ACERT TIER 3 730 to 940 eKw
Cat C280-6 1760 to 1820 eKw
Cat C280-8 2350 to 2420 eKw
Cat C280-12 3520 to 3640 eKw
Cat C280-16 4700 to 4840 eKw
Cat 3512C 1550 to 1700 eKw

Electro-Motive Diesel (EMD) Engines

The Electro-Motive Diesel EMD E 23 engine is the latest in one of the longest-lasting medium-speed engine families in the world. With 80 years of experience and over 78,000 engines delivered, EMD’s two-cycle engine design can be counted on to meet your need for power and productivity while also complying with environmental regulations and fuel availability.

The E 23 meets US EPA Tier 4 Final and IMO III regulations, with Dual-Fuel options available and a Natural Gas option to come in 2017. These technologies are the result of continuous optimization and improvement of the E 23’s proven design, delivering the most efficient and durable machine in its class while allowing customers to take advantage of alternative fuels.

electro-motive diesel engine
Model Power Range Horsepower
8 E 23 / 23B (710 Series) 1391-1641 bkW 2000-2200 BHP
12 E 23 / 23B (710 Series) 2237-2461 bkW 3000-3300 BHP
16 E 23 / 23B (710 Series) 2981-3281 bkW 4000-4400 BHP
20 E 23 / 23B (710 Series) 3279-4101 bkW 5000-5500 BHP

2021 Cat Marine Engines Guide

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