New | Cat 3516B Marine Propulsion Engine

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 Range1650-3000 bhp (1230-2237 bkW)
Engine Specifications
Speed Range1200-1800 rpm
ConfigurationVee 16, 4-Stroke-Cycle Diesel
Bore6.7 in
Stroke7.5 in
Displacement4210.0 in3
Rotation (from flywheel end)Counterclockwise or Clockwise
EmissionsIMO II
Dimensions & Weights
Minimum Length131.9 in
Maximum Length146.7 in
Minimum Width67.0 in
Maximum Width80.8 in
Minimum Height69.0 in
Maximum Height82.3 in
Minimum Dry Weight17185.0 lb

Electronic Unit Injector Fuel System Featuring 10-20 Percent Higher Injection Pressure Than Other 3500 Family Engines

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

“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 (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 To Maintain Reliability And Durability While Providing Higher Injection Pressures

Center-mounted Low Inertia Turbochargers (four On 3512b And 3516b; Two On 3508b) On Epg Models

Dual Rear Mounted Turbochargers On All Marine Configurations

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 To Reduce Parasitic Pumping Losses And Increase Combustion Efficiency

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 That Use Formed Elastomeric Seals And Substantially Fewer Fasteners To Give Superior Sealing Characteristics And Easier Serviceability

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 Eliminating Gasket Relaxation To Maintain Consistent Dimensions For Valve Lash And Injection Settings And Nuisance-type Oil Leaks.

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.



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