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The 3508B marine propulsion engine features ratings from 578 bkw (786 mhp) to 1118 bkw (1521 mhp). Highlights of this engine include the AdvancedDiesel Engine Management System II, Control MonitoringProtection System, Customer Communication Module, and DigitalVoltage Regulator.

Power Rating

Power Range 775-1500 bhp (578-1118 bkW) 775-1500 bhp (578-1118 bkW) Less
Continuous Ratings - Maximum Power 1000.0 bhp 746.0 bkW Less
Heavy Duty Ratings - Maximum Power 1050.0 bhp 783.0 bkW Less
Maximum Continuous Ratings - Maximum Power 1100.0 bhp 820.0 bkW Less

Engine Specifications

Speed Range 1200-1925 rpm 1200-1925 rpm Less
Emissions IMO I IMO I Less
Aspiration TTA TTA Less
Bore 6.7 in 170.0 mm Less
Stroke 7.5 in 190.0 mm Less
Displacement 2105.0 in3 34.5 L Less
Rotation (from flywheel end) Counterclockwise or clockwise Counterclockwise or clockwise Less
Configuration Vee 8, 4-Stroke-Cycle Diesel Vee 8, 4-Stroke-Cycle Diesel Less

Dimensions & Weights

Minimum Dry Weight 10181.0 lb 4618.0 kg Less
Minimum Length 90.9 in 2310.0 mm Less
Maximum Length 90.9 in 2310.0 mm Less
Minimum Height 71.0 in 1803.0 mm Less
Maximum Height 71.0 in 1803.0 mm Less
Minimum Width 67.1 in 1703.0 mm Less
Maximum Width 67.1 in 1703.0 mm Less

Electric Unit Injector Fuel System

Electronic Unit Injector fuel systemfeaturing 10-20 percent higher injectionpressure than other 3500 Family engines

Caterpillar ADEM II Electronic Engine Control/Monitoring System

Caterpillar ADEM II Electronic EngineControl/Monitoring System that providesinfinitely variable injection timing and astate-of-the-art monitoring and protectionsystem with self-diagnosing electronicsensors

“Deep Crater/Low Crevice Volume” Two-Piece Articulated Piston Design

“Deep Crater/Low Crevice Volume” twopiecearticulated piston design with forgedsteel crown and cast aluminum skirt thatenhance combustion efficiency to provideimproved fuel efficiency and lower levels ofgaseous 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 traintorsional vibration

Fuel Injection System

Strengthened fuel injection actuation systemand rear gear train to maintain reliability anddurability while providing higher injectionpressures

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 allmarine configurations

Separate Circuit or Sea Water Aftercooling

Separate circuit or sea water aftercooling tosupply the optimum temperature air to thecombustion chamber to reduce emissions andfuel consumption and maximize poweroutput

Streamlined Intake and Exhaust Manifolds

Streamlined intake and exhaust manifolds toreduce parasitic pumping losses and increasecombustion efficiency

Thermo-laminated heat shields

Thermo-laminated heat shields on allmarine configurations to maintain surfacetemperatures below Marine ClassificationSociety regulations and to retain moreexhaust gas energy for increasedturbocharger performance

Electronic instrument panel

Electronic instrument panel with eight analoggauges, 10 LEDs, and one LCD read-out todisplay engine operating conditions and faultcodes

Pin-type connector for easy connection of Caterpillar Engine Technician electronic service tool

Pin-type connector for easy connection ofCaterpillar Engine Technician electronicservice tool which delivers superiordiagnostic capability to determine exactcauses of engine faults

Formed lastomeric Seals

Formed elastomeric seals replace gaskets onrocker arm bases eliminating gasketrelaxation to maintain consistent dimensionsfor valve lash and injection settings andnuisance-type oil leaks.

Redesigned aftercooler-to-intake manifold joints

Redesigned aftercooler-to-intake manifoldjoints that use formed elastomeric seals andsubstantially fewer fasteners to give superiorsealing characteristics and easierserviceability

3508B Standard Equipment

Fuel System
  • Fuel filter, RH, with service indicators.
  • Fuel transfer pump.
  • Electronically controlled init injectors

  • Graphical Unit (Marine Power Display) for analog or digital displayof

Lube System
  • Crankcase breather, Top mounted
  • Oil filter, RH, with service indicators
  • Oil filler and dipstick, RH
  • Standard sump oil pan (500 Hour oil change interval)
  • Oil pump, gear type

Mounting System
  • Rails, engine mounting, ledge type, 203 mm x 203 mm (8 in x 8 in)

Power Takeoffs
  • Accessory drive
  • Front housing, two-sided

Protection System
  • A4 ECU Electronic Monitoring System provides customer programmable engine de-rate strategies to protect against adverse operating conditions

  • Vibration damper and guard
  • Lifting eyes
  • Paint, Caterpillar Yellow engine with black rails
  • NOTE: Engines for heat exchanger cooling do NOT includeheat exchanger.

Flywheel and Flywheel Housing
  • Flywheel, SAE No. 0, 151 teeth.
  • Flywheel housing, SAE No. 0.

Air Inlet System
  • Separate circuit aftercooler core, corrosion resistant coated(air side)
  • Air cleaner, regular duty
  • Dual turbochargers, 152 mm (6 in) OD straight connection

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

Cooling System
  • Oil cooler
  • Thermostats and housing, Full open temperature 92 C (198 F)
  • Jacket water pump, gear driven, centrifugal
  • Auxiliary fresh water pump with SCAC engines
  • Auxiliary sea water pump, Centrifugal, Non-self-priming
  • Expansion tank

Exhaust System
  • Dry gas tight exhaust manifolds with heat shields.
  • Dual turbochargers with watercooled bearings and heat shield.
  • Exhaust outlet, vertical, 203 mm (8 in) round flanged.

Protection System
  • AIII Electronic Monitoring System provides customer programmableengine de-ration strategies to protect against adverse operatingconditions
  • Emergency stop push button (located in Electronic Instrument Panel)Safety shutoff protection:

3508B Optional Equipment

Charging System
  • Battery Charger, 10 amp
  • Charging Alternators

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
  • Air Separator
  • Marine Gear Cooling

Flywheels & Flywheel Housing

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

Mounting System
  • Engine Supports
  • Vibration Isolators

Power Take-Offs
  • Front Housing Accessories
  • Flexible Coupling and Guards
  • Upper Left Hand Front Location:
  • Upper Right Hand Front Location:
  • Upper Right Hand Rear Location:
  • Lower Left Hand Front Location:
  • Lower Left Hand Rear Location:
  • Front Housing Accessory Drives
  • Upper LH Accessory Drive
  • Upper RH Accessory Drive
  • Front Power Take Offs
  • Crankshaft Pulleys
  • Damper Guard Removals

Air Inlet System
  • Remote Air Inlet Adapters

Control System
  • Throttle Position Sensor
  • Throttle Position Signal Conv.
  • Throttle Position Sensor Removal
  • Local Speed Throttle Control
  • Throttle Synchronization

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

Lube & Fuel System

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

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

Spare Parts Kits

Special Appearance
  • Special Appearance Packages with Chrome Covers
  • Chrome Plated Relief Valves
  • Black Air Cleaners
  • Yacht Class Finish

Starting System
  • Starting Motors or Barring Device
  • Air Starting Motor Options:
  • Starting Aids
  • Battery Sets - 24 Volt - Dry
  • Battery rack

  • Tool set
  • Caterpillar datalink wire

  • Special Paints

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

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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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