New | 3512C Tier 3 Marine Propulsion Engine

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 Range1340-2366 bhp (1000-1765 bkW)
Engine Specifications
Speed Range1600-1800 rpm
EmissionsEPA Tier 3, IMO II
Bore6.69 in
Stroke8.46 in
Displacement3574.0 in3
Rotation (from flywheel end)Counterclockwise or Clockwise
ConfigurationVee 12, 4-Stroke-Cycle Diesel
Dimensions & Weights
Minimum Dry Weight16508.0 lb
Minimum Length104.2 in
Maximum Length104.2 in
Minimum Height87.5 in
Maximum Height87.5 in
Minimum Width80.2 in
Maximum Width80.2 in

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

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
  • 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
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
  • Graphical Unit (Color Marine Power Display) for analog or digital of:



Other Models in this Category

Select Marine Power System Type

Hawthorne Power Systems Logo

Hot Deals - Buy New. Buy Now. We'll Make Your Down Payment. Learn More.

Why Cat is Better. Machine Comparison

With only a few days notice, we were able to get the emergency system working properly. Hawthorne Cat provided great leadership and excellent field support.
Mark Cripe
Helix Electric

San Diego - Power
Steve Jamison
Power Systems Sales Manager
858.376.6821 office
858.688.0083 mobile

Phillip J. Smith (PJ)
Service Manager - CSA Group/Truck Shop
858.376.6874 office
858.688.0134 mobile

Dan Hixon
Field Service Manager
858.376.6822 office
858.663.4652 mobile

Paul Karpf
Rental Department Manager
858.376.6888 office
858.688.0039 mobile

Tom Bonham
Product Support Sales &
Advanced Electrical Services Manager
858.376.6898 office
442.248.2108 mobile

Hawaii – Power
Cliff Yuen
Power Systems Sales Manager
808.676.0322 office
808.349.7767 mobile

Travis Tilton
General Service Manager
808.676.0314 office
808.864.1903 mobile

Bobby Fields
Rental Developer
808.676.0267 office
808.368.5445 mobile

Guam – Power
Myver Hecita
Power Systems Rental &
Sales Representative
671.649.4241 office
671.898.2740 mobile

Jimmy Cruz
Engine Service Manager
671.649.4216 office
671.488.2821 mobile