3512C Tier 3

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The 3512C High Displacement marine engines are now available in a wide range of ratings that meet EPA Marine Tier 3 and IMO II regulations without any additional aftertreatment. These new propulsion, auxiliary, and DEP engines, designed and built from the current 3512C and 3516C platforms, have minimal dimensional and weight changes in comparison. Owning and operating costs are also very similar. For the specific fuel consumption of each rating please refer to the performance data. New features include stainless steel exhaust heat shields, closed crankcase ventilation system, and EPA Tier 3 compliance.

Power Rating

  • Power Range 1340-2366 bhp (1000-1765 bkW) 1340-2366 bhp (1000-1765 bkW)

Engine Specifications

  • Speed Range 1600-1800 rpm 1600-1800 rpm
  • Emissions EPA Tier 3, IMO II EPA Tier 3, IMO II
  • Aspiration TTA TTA
  • Bore 6.69 in 170.0 mm
  • Stroke 8.46 in 215.0 mm
  • Displacement 3574.0 in³ 58.6 l
  • Rotation from Flywheel End Counterclockwise or Clockwise Counterclockwise or Clockwise
  • Configuration Vee 12, 4-Stroke-Cycle Diesel Vee 12, 4-Stroke-Cycle Diesel

Dimensions & Weights

  • Minimum Dry Weight 16508.0 lb 7488.0 kg
  • Minimum Length 104.2 in 2465.0 mm
  • Maximum Length 104.2 in 2465.0 mm
  • Minimum Height 87.5 in 2222.6 mm
  • Maximum Height 87.5 in 2222.6 mm
  • Minimum Width 80.2 in 2037.0 mm
  • Maximum Width 80.2 in 2037.0 mm

Making Your Investment Work Harder

Uses advanced predictive modeling software to select best nozzle configurations and combustion cylinder geometry, Stainless steel exhaust manifold and turbo heat shields, Closed crankcase ventilation system, Dual camshafts, Reduced aftercooler heat load for smaller heat exchanger requirements


A wide range of power ratings available, No aftertreatment technology required, Fuel consumption nominal rated BSFC


Modified piston bowl shape to improve combustion and reduce emissions, Uses K-factor injector to align with predictive model analysis, Better electronic injection control using crank timing vs. cam timing, EPA Marine Tier 3/IMO Tier II Emissions Compliant, Lower IMAT = Lower NOx


Electronic governing (A4 ECU), Instrument panel shipped loose with Color Marine Power Display (MPD), Cold mode start strategy, Programmable low idle, Optional marine alarm and protection system


Single-source support, Caterpillar warranty for all factory packaged components, Industry-leading one-year warranty on parts

3512C Tier 3 Standard Equipment

Air Inlet System

  • Separate circuit aftercooler core, corrosion resistant coated (air side)
  • Powercore air cleaner

Control System

  • Dual Caterpillar A4 Electronic Engine Control with Electronic Unit Injector Fuel System
  • Rigid Wiring Harness (10 amp DC power required to drive Electronic Engine Control Module)

Exhaust System

  • 3500C engines:

Fuel System

  • Fuel transfer pump
  • Electronically Controlled Unit Injectors

Lube System

  • Crankcase breather groups, Top mounted
  • Oil filler and dipstick, LH or RH
  • Oil pump, gear type
  • 250 or 1000 hour sump oil pan

Mounting System

  • 3500C engines:

Power Takeoffs

  • Accessory drives: Lower RH, lower LH
  • Front housing, two-sided

Protection System

  • A4 Electronic Monitoring System provides customer programmable engine derating strategies to protect against adverse operating conditions
  • Emergency stop push button (located in Electronic Instrument Panel)
  • Safety shutoff protection:


  • Vibration damper and guard
  • Lifting eyes
  • NOTE: Engines for heat exchanger cooling do NOT include heat exchange

Flywheel and Flywheel Housing

  • Flywheel, SAE No. 00, 183 teeth
  • Flywheel housing, SAE No. 00

Cooling System

  • Oil cooler
  • Thermostats and housing, Full open temperature 92 C (198 F)
  • Jacket water pump, gear driven, centrifugal
  • Auxiliary fresh water pump
  • Aftercooler system: If using glycol, up to maximum 20% glycol concentration is allowed


  • Electronic service meter, instrument panel (24V), start/stop switch, emergency stop button, maintenance due light, diagnostic light, warning light, maintenance clear switch, start motor magnetic switch, 15 and 3A breakers
  • Graphical Unit (Color Marine Power Display) for analog or digital of:

3512C Tier 3 Optional Equipment

Air Inlet System

  • Air Inlet Adapters

Charging System

  • Battery Chargers
  • Charging Alternator

Control System

  • Throttle Control

Cooling System

  • Coolant Shunt Tank
  • Cooling System Options

Exhaust System

  • Flexible Fittings
  • Elbows
  • Flanges
  • Flange and Exhaust Expanders
  • Mufflers

Fuel System

  • Fuel Cooler Heat Exchanger - Sea Water
  • Primary Fuel Filter
  • Fuel Level Switch
  • Rigid Fuel Lines
  • Flexible Fuel Lines


  • Communication Modules
  • Color Marine Power Display System
  • Pilot House Instrument Panels
  • Marine Gear Sensors

Lube System

  • Sump Pumps
  • Lubricating Oil

Power Take-Offs

  • Stub Shafts
  • Crankshaft Pulleys
  • Damper Guard
  • Flexible Coupling and Guards

Marine Society Requirements

  • Green Passport Documentation
  • Spray Shielding

Protection System

  • Shutoff and Alarm Contactors

Special Appearance Packages

  • Special Appearance Packages with Chrome Covers
  • Yacht Class Finish

Starting System

  • Air Starting Motor Options
  • Battery Sets - 24 Volt - Dry
  • Battery Rack

Mounting System

  • Engine Supports
  • Vibration Isolation Mountings


  • Paint Color Options


  • Shrink Wrap Protection
  • Storage Preservation with Glycol Solution/Vapor Corrosion Inhibitor
  • Export Boxing
  • Export Packaging

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