New | 3512C Propulsion Engine (IMO II)

The Cat 3512C marine propulsion engine makes your investment work harder. Through a wide range of available power ratings (including High Displacement ratings), no required aftertreatment technology, and nominal rated BSFC fuel consumption - it will drive down your total cost of ownership. With a redesigned piston bowl shape to improve combustion, and improved fuel delivery, this engine is IMO II emissions compliant and committed to sustainable environmental development. Single-source support, the Caterpillar warranty, and industry-leading one-year warranty on parts make the 3512C a fully integrated marine power solution.

Power Rating
Power Range1280-2551 bhp (955-1902 bkW)
Engine Specifications
Speed Range1200 rpm, 1600 rpm, 1800 rpm
ConfigurationVee 12, 4-Stroke-Cycle Diesel
Bore6.69 in
Stroke7.48 in
Stroke (High Displacement)8.5 in
Displacement3161.0 in3
Displacement (High Displacement)3574 in3
Rotation (from flywheel end)Counterclockwise or Clockwise
EmissionsIMO II, EU IW
Dimensions & Weights
Minimum Length102.0 in
Maximum Length105.1 in
Minimum Width80.2 in
Maximum Width87.9 in
Minimum Height75.0 in
Maximum Height88.3 in
Minimum Dry Weight14400.0 lb
Maximum Dry Weight16340 lb

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, 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
  • Rails, engine mounting, ledge type, 203 mm x 203 mm (8 in x 8 in) or Front Trunnion
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:



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Helix Electric

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