3508C Propulsion Engine

  • Overview
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A3 Electronic Control Unit (ECU)

 • One of the most advanced electronic control systems available for Cat marine engines.
 • Faster with more memory capability than ADEM 2
 • Compatible with several optional display systems
 • Does not require fuel cooling
 • Enhanced input/output capacity
 • Rugged marine design and IP66 connectors
 • Award-winning circuitry design

Engine-Mounted Instrument Panel

 • Integrated MPD display for quick response and effective local control
 • Optional local speed control
 • Optional individual cylinder exhaust temperature scanner with data link for remote mounting
 • Local E-stop, warning indicators, horn
 • Plug & Run connections allow mounting on port or starboard side of engine

Marine Power Display (MPD)

 • Graphic display of engine operating parameters in analog, digital, or bar-chart format
 • Rugged weatherproof construction
 • Fully user-configured display screens
 • Marine classification society-type approved
 • Diagnostic messages and alarms
 • Three-tier prioritization of events and diagnostics
 • Multilingual capability
 • Night-mode LCD display
 • ISO symbols for parameter identification

High Capacity High Efficiency Turbos

 • Standard marine twin turbocharger configuration.
 • More reserved power for superior part load performance at continuous ratings
 • Turbos tuned for high power and excellent fuel consumption

Engine-Mounted Cat® Plate-Type Heat Exchanger

 • Separate Circuit Aftercooled (SCAC)
 • Single heat exchanger for both jacket water and aftercooler systems
 • Single inlet and outlet connections for sea water
 • Lightweight and compact
 • Factory-installed piping and connections

Rigid Wiring Harness

 • Highly durable: long service life
 • Flexibility for custom wire additions
 • Lined with fire retardant foam
 • Cost efficient replacement for premium wiring
 • Marine classification society approved

Power Distribution Box

 • Isolates “control power” from alternator/starter/jacket water heater power
 • Mountable off engine
 • Allows end user to choose up to three independent power sources
 • Has built-in circuit breakers and switches for easy troubleshooting

Marine Classification Society Approvals


Electronic Features

 • 3D histogram data of engine operation (load, speed, time)
 • Load feedback signal for CPP operation
 • Electronic torque limit for re-power and torque limited application equipment
 • Programmable droop
 • Adjustable governor gains
 • Condition-based maintenance
 • Monitoring features
 • Serial data bus communications
 • Primary and secondary A3 controllers on all propulsion engines

Cat Pilot House Panels

 • Cat pilot house panels with or without Marine Power Display (MPD)
 • Easily connected to the engine customer connector
 • Ability to have full function helm panels and reduced function wing panels

Unit Injectors

 • Caterpillar designed and built system
 • “Drop-in” installation
 • No threaded fuel connections
 • High pressure only inside injector does not require double wall lines or leak collection devices

Power Take-off

 • Power take-off adapters available
 • Auxiliary drives for power take-offs for hydraulic pumps and compressors

Engine-Mounted Gear-Driven Pumps

 • Standard engine-mounted aftercooler pump
 • Standard engine-mounted jacket water pump
 • Optional engine-mounted, gear-driven, high capacity sea water pump

Engine Mounting System

 • Rigid mounting points
 • Optional resilient mounting

In-Hull Overhaul

 • Easily removable side covers
 • Accessible bearing caps

Power Rating
Power Range 775-1100 bhp (578-820 bkW)
Engine Specifications
Speed Range 1200-1600 rpm
Emissions IMO II, EU IW
Aspiration TTA
Bore 170 mm (6.7 in)
Stroke 190 mm (7.5 in)
Displacement 34.5 l (2107 inu00b3)
Rotation from Flywheel End Counterclockwise or Clockwise
Configuration Vee 8, 4-Stroke-Cycle Diesel
Dimensions & Weights
Minimum Dry Weight 4960 kg (10935 lb)
Length 2117 mm (83.4 in)
Height 1829 mm (72 in)
Width 1703 mm (67 in)

Standard Equipment

  • Fuel System
    • Fuel filter, RH, with service indicators.
    • Fuel transfer pump.
    • Electronically controlled init injectors
  • Instrumentation
    • Graphical Unit (Marine Power Display) for analog or digital display of
  • 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
    • AIII Electronic Monitoring System provides customer programmable engine de-ration strategies to protect against adverse operating conditions
    • Emergency stop push button (located in Electronic Instrument Panel) Safety shutoff protection:
  • General
    • Vibration damper and guard
    • Lifting eyes
    • Paint, Caterpillar Yellow engine with black rails
    • NOTE: Engines for heat exchanger cooling do NOT include heat 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, LH with 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.

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
  • Instrumentation
    • 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 System
    • Oil Pan
    • Oil Pan Accessories
    • Sump Pumps
    • Lubricating Oil
  • Protection System
    • Air Inlet Shutoffs
    • Switches and Contactors
    • Explosion Relief Valve
    • Sensors
  • 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
  • General
    • Tool set
    • Caterpillar datalink wire
  • Packing
    • Shrink Wrap Protection
    • Storage Preservation with Glycol Solution/Vapor Corrosion Inhibitor
    • Storage Preservation with Vapor Corrosion Inhibitor
    • Export Packaging

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