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Fuel System

Electronic Unit Injector fuel system featuring 10-20 percent higher injection pressure than other 3500 Family engines

Control System

Caterpillar ADEM II Electronic Engine Control/Monitoring System that provides infinitely variable injection timing and a state-of-the-art monitoring and protection system with self-diagnosing electronic sensors

fuel efficiency and lower levels of gaseous and visible emissions

“Deep Crater/Low Crevice Volume” twopiece articulated piston design with forged steel crown and cast aluminum skirt that enhance combustion efficiency to provide improved fuel efficiency and lower levels of gaseous and visible emissions

Larger diameter camshaft

Larger diameter (98 mm vs. 92 mm bore) camshaft for higher injection pressures, shorter injection durations, and less gear train torsional vibration

Strengthened fuel injection actuation system and rear gear train

Strengthened fuel injection actuation system and rear gear train to maintain reliability and durability while providing higher injection pressures

Center-mounted low inertia turbochargers

Center-mounted low inertia turbochargers (four on 3512B and 3516B; two on 3508B) on EPG models

rear mounted turbochargers

Dual rear mounted turbochargers on all marine configurations

Separate circuit or sea water aftercooling

Separate circuit or sea water aftercooling to supply the optimum temperature air to the combustion chamber to reduce emissions and fuel consumption and maximize power output

Streamlined intake and exhaust manifolds

Streamlined intake and exhaust manifolds to reduce parasitic pumping losses and increase combustion efficiency

Thermo-laminated heat shields

Thermo-laminated heat shields on all marine configurations to maintain surface temperatures below Marine Classification Society regulations and to retain more exhaust gas energy for increased turbocharger performance

Redesigned aftercooler-to-intake manifold joints

Redesigned aftercooler-to-intake manifold joints that use formed elastomeric seals and substantially fewer fasteners to give superior sealing characteristics and easier serviceability

easy connection of Caterpillar Engine Technician electronic service tool

Pin-type connector for easy connection of Caterpillar Engine Technician electronic service tool which delivers superior diagnostic capability to determine exact causes of engine faults

Formed elastomeric seals replace gaskets on rocker arm bases

Formed elastomeric seals replace gaskets on rocker arm bases eliminating gasket relaxation to maintain consistent dimensions for valve lash and injection settings and nuisance-type oil leaks.


The 3516B marine propulsion engine includes the Advanced Diesel Engine Management System II, Control Monitoring Protection System, Customer Communication Module, and Digital Voltage Regulator. Benefits include improved fuel economy, reduced visible and gaseous emissions, enhanced diagnostic and monitoring capabilities, and increased rated output with no reduction in reliability. High displacement (HD) ratings, high performance ratings, and wide operating speed range (WOSR) ratings are available within this power range.

Power Rating

Power Range 1650-3000 bhp (1230-2237 bkW) 1650-3000 bhp (1230-2237 bkW) Less

Engine Specifications

Speed Range 1200-1800 rpm 1200-1800 rpm Less
Emissions IMO II IMO II Less
Aspiration TTA TTA Less
Bore 6.7 in 170.0 mm Less
Stroke 7.5 in 190.0 mm Less
Displacement 4210.0 in3 69.0 L Less
Rotation (from flywheel end) Counterclockwise or Clockwise Counterclockwise or Clockwise Less
Configuration Vee 16, 4-Stroke-Cycle Diesel Vee 16, 4-Stroke-Cycle Diesel Less

Dimensions & Weights

Minimum Dry Weight 17185.0 lb 7795.0 kg Less
Minimum Length 131.9 in 3349.0 mm Less
Maximum Length 146.7 in 3725.0 mm Less
Minimum Height 69.0 in 1753.0 mm Less
Maximum Height 82.3 in 2091.0 mm Less
Minimum Width 67.0 in 1703.0 mm Less
Maximum Width 80.8 in 2053.0 mm Less

3516B Standard Equipment

Air Inlet System
  • Sea Water Aftercooler core, copper-nickel tubes, copper fins, for sea water/air environment
  • Air cleaners, high performance
  • Turbocharger, watercooled bearing housings, 152 mm (6 in) OD straight connection

Control System
  • Dual Caterpillar A-III Electronic Engine Control, LH with Electronic Unit Injector Fuel System
  • Rigid Wiring Harness (10 amps DC power required to drive Electronic Engine Control Module)

Cooling System
  • Oil cooler
  • Air separator (deaerator), shipped loose
  • Thermostats and housing, Full open temperature 92 C (198 F) LH outlet
  • Jacket water pump, gear driven, centrifugal
  • Auxiliary sea water pump, Self-priming
  • Coolant shunt tank, not installed

Exhaust System
  • Dry gas tight manifold with Thermo-laminated heat shields
  • Dual Turbochargers with watercooled bearings and heat shields
  • Exhaust outlet, vertical, 356 mm (14 in) round flanged outlet

Flywheels & Flywheel Housings
  • Flywheel, SAE No. 00, 183 teeth
  • Flywheel housing, SAE No. 00

Fuel System
  • Fuel filters, Dual spin-on, with service indicators, Front Mounted
  • Fuel transfer pump
  • Electronically Controlled Unit Injectors

  • Graphical Unit (Marine Power Display) for analog or digital display of: Engine Oil Pressure, Engine Water Temperature, Fuel Pressure, System DC Voltage, Air Inlet Restriction ,RH & LH Exhaust Temperature (prior to turbocharger), Fuel Filter Differential, Oil Filter Differential, Service meter, Engine Speed, Instantaneous Fuel Consumption, Total Fuel Consumed, Engine Control Switch (4 position), Alarm Horn, Alarms are prioritized, Backup ECM ready light, Backup ECM in control light, Overspeed shutdown notification light, Emergency stop notification light, Prelube override, Shutdown override

Lube System
  • Crankcase breather; Top mounted
  • Oil filter, Four spin-on, front mounted
  • Oil filler and dipstick, RH
  • Rear sump oil pan, aluminum
  • Oil pump, gear type, scavenge
  • Oil pump, gear type

Mounting System
  • Front trunnion
  • Rear pads on sides of flywheel housing

Power Take-offs
  • Accessory drive on standard rotation engines: lower RH, lower LH
  • Accessory drive on opposite rotation engines: upper and lower RH, lower LH
  • Front housing, Two-sided

Protection System
  • A-III Electronic Monitoring System provides customer programmable engine de-ration strategies to protect against adverse operatingons conditions
  • Emergency stop push button (located in Electronic Instrument Panel)
  • Safety shutoff protection: Oil pressure and water temperature (non-redundant, uses OP and WT sensors)
  • Overspeed (redundant and independent of engine governing system speed sensed by backup ECM which is MCS approved)

  • Vibration damper and guard
  • Caterpillar Yellow Paint
  • Lifting eyes, front and rear
  • NOTE: Engines for keel cooling do NOT include keel cooler. Engines for heat exchanger cooling do NOT include heat exchanger.

3516B Optional Equipment

Air Inlet System
  • Air Cleaner Removal
  • Remote Air Inlet Adapters

Charging System
  • Battery Chargers
  • Charging Alternators

Control System
  • Throttle Synchronization
  • Throttle Position Sensor

Cooling System
  • Water Level Switch Gauge
  • Coolant Level Sensors
  • Connections
  • Keel Cooling Conversions
  • Heat Exchangers
  • Auxiliary Water Pumps
  • Sea Water Pump Removal
  • Coolant Shunt Tanks
  • Marine Gear Cooling
  • Air Separator

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

Fuel System
  • Fuel Cooler
  • Fuel Priming Pumps
  • Flexible Fuel Lines
  • Rigid Fuel Lines
  • Primary Fuel Filter
  • Fuel level switch

  • PL1000T Communication Module
  • PL1000E Communication Module
  • Customer Interface
  • Thermocouples
  • Remote Panel Display
  • Remote Cylinder Temperature Display
  • Pilot House Instrument Panels
  • Marine Gear Sensors
  • Engine Vision Display System

Lube System
  • Sump Pumps
  • Prelubrication Options
  • Oil Pan Accessories
  • Oil Pan
  • Lubricating Oil

Mounting System
  • Engine Supports
  • Vibration Isolation Mountings

Power Take-Offs
  • Flexible Coupling and Guards
  • Front Housing Accessories
  • Front Housing Accessory Drives
  • Front Power Take Offs
  • Crankshaft Pulleys
  • Damper Guard Removals

Protection System
  • Air Inlet Shutoffs
  • Switches and Contactors
  • Explosion Relief Valve
  • Sensors

Spare Parts Kits
  • Parts Kits
  • Pump Kits

Special Appearance
  • Chrome Plated Relief Valves
  • Black Air Cleaners

Starting System
  • Air Starting Motors Options
  • Starting Aids
  • Battery Sets - 24 Volt - Dry
  • Battery Rack

  • Tool Set
  • Caterpillar Datalink Wire

Society Approvals
  • Marine Society Requirements

Cat® Dealer Service

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Extended Warranty and Support

Caterpillar offers a variety of integrated solutions to help you protect your investment, minimize owning and operating costs, and maximize up-time.

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