Cat 3516 Seattle Low

  • Specs Summary
  • Minimum Rating
  • Maximum Rating
  • Aspiration
  • Power Range

3516E Marine Auxiliary Engine (U.S. EPA Tier 4 Final)

The 3516E 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 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.

Power Rating

Engine Specifications

Dimensions & Weights

Standard Equipment

Air Inlet System

  • Corrosion-resistant aftercooler core

Control System

  • Dual A5 engine control modules with electronic unit injection and low pressure fuel system

Cooling System

  • Auxiliary fresh water pump
  • Gear Driven, centrifugal jacket water pump with 40% more capacity

Exhaust System

  • Dual turbochargers with water-cooled bearings and heat shields

Fuel System

  • Duplex Fuel and Oil Filtration


  • Vibration damper and guard
  • Meets SOLAS regulations

Optional Equipment

Plate-type heat exchanger with integrated SCAC and JW Water expansion tanks

Special appearance packages with chrome covers

Marine society certifications

Power take-off

Certified marine alarm and protection safety system

Standard instrument panel with color touchscreen display

Mounting rails and trunnion mount options

Engine mounted fuel cooler (SCAC Water Cooled)

Sea water pump with 25% more capacity for cooling auxiliary vessel equipment

Closed crank case ventilation