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The Cat 3512C HD marine propulsion engine makes your investment work harder. Through a wide range of available power 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 Range 1500-2551 bhp (1118-1902 bkW) 1500-2551 bhp (1118-1902 bkW) Less
Continuous Ratings - Maximum Power 1810.0 bhp 1350.0 bkW Less
Heavy Duty Ratings - Maximum Power 2250.0 bhp 1678.0 bkW Less
Maximum Continuous Ratings - Maximum Power 2365.0 bhp 1765.0 bkW Less

Engine Specifications

Speed Range 1200-1800 rpm 1200-1800 rpm Less
Emissions IMO I, IMO II, EU IW IMO I, IMO II, EU IW Less
Aspiration TTA TTA Less
Bore 6.69 in 170.0 mm Less
Stroke 8.46 in 215.0 mm Less
Displacement 3574.0 in3 58.6 L Less
Rotation (from flywheel end) Counterclockwise or Clockwise Counterclockwise or Clockwise Less
Configuration Vee 12, 4-Stroke-Cycle Diesel Vee 12, 4-Stroke-Cycle Diesel Less

Dimensions & Weights

Minimum Dry Weight 14400.0 lb 6532.0 kg Less
Minimum Length 102.0 in 2590.0 mm Less
Maximum Length 105.1 in 2669.0 mm Less
Minimum Height 75.0 in 1904.0 mm Less
Maximum Height 88.3 in 2242.0 mm Less
Minimum Width 80.2 in 2037.0 mm Less
Maximum Width 87.9 in 2232.0 mm Less


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


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


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 HD Standard Equipment

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

Control System
  • Dual Caterpillar A4 Electronic Engine Controlwith Electronic Unit Injector Fuel System
  • Rigid Wiring Harness (10 amp DC powerrequired 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 programmableengine derating strategies to protect against adverse operatingconditions
  • 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 includeheat 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% glycolconcentration is allowed

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

3512C HD 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

Spare Parts Kits

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

Transitional Vibration Analysis

  • Paint Color Options

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

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