3512E Marine Auxiliary/DEP Engine (U.S. EPA Tier 4 Final)

The 3512E marine auxiliary engine is now available in a wide range of ratings that meet U.S. EPA Tier 4 Final and IMO III marine emissions regulations. As the commercial marine industry adjusts their operations to meet U.S. EPA Tier 4 Final and IMO III emissions standards, Caterpillar Marine has introduced a solution built to maximize performance while meeting regulations. Caterpillar’s combination of a fuel-efficiency-optimized engine and a selective catalytic reduction (SCR) aftertreatment system is a solution that not only reduces NOx emissions, but can also lower a customer’s owning and operating costs in the process.

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Power Range 732-2399 bhp (546-1789 bkW)
Aspiration TA
Emissions U.S. EPA Tier 4 Final, IMO III
Bore 6.69 in
Displacement 3574 in³
Stroke 8.46 in
Rotation from Flywheel End Counterclockwise
Configuration Vee 12, 4-Stroke-Cycle Diesel
Maximum Width 81.9 in
Minimum Width 71.2 in
Maximum Height 91.9 in
Minimum Height 91.9 in
Minimum Dry Weight 18025 lb
Maximum Length 125.4 in
Minimum Length 104.2 in
Air Inlet System
  • Corrosion-resistant aftercooler core
Control System
  • Dual A5 engine control modules with electronic unit injection and low pressure fuel system
Exhaust System
  • Dual turbochargers with water-cooled bearings and heat shields
  • Vibration damper and guard
  • Meets SOLAS regulations
Fuel System
  • Duplex Fuel and Oil Filtration
Cooling System
  • Auxiliary fresh water pump
  • Gear Driven, centrifugal jacket water pump with 40% more capacity