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Auxiliary Engines

Industry-leading technology allows Caterpillar to create the most reliable commercial engines for a variety of applications. From tugs and container vessels to yachts and sport fishers, Cat and MaK engines have demonstrated their efficiency countless times. With remarkable reliability and durability, these engines will exceed your expectations for decades.

Cat 3508B Marine Auxiliary/Generator Set Engine

  • Specification Summary

  • Minimum Rating 649 bkW
  • Maximum Rating 968 bkW
  • Aspiration TA
  • Stroke 190 mm
  • Specification Sheet

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Product Details

Power Rating

Minimum Rating 649 bkW
Maximum Rating 968 bkW

Engine Specifications

Aspiration TA
Displacement 34.5 L
Bore 170 mm
Configuration Vee 8 4-Stroke-Cycle Diesel
Stroke 190 mm

Dimensions & Weights

Minimum Dry Weight 5115 kg
Maximum Dry Weight 5216 kg
Minimum Length 2310 mm
Maximum Width 1703 mm
Minimum Height 1806 mm
Maximum Height 1826 mm
Minimum Width 1703 mm
Maximum Length 2350 mm
  • 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
  • Separate Circuit aftercooler core, corrosion resistant coated (air side)
    • Air cleaner, regular duty
      • Dual Turbochargers, 152 mm (6 in) OD straight connection
        • CONTROL SYSTEM
          •  Caterpillar A-III Electronic Engine Control, LH with Electronic Unit Injector Fuel System
          •  Rigid Wiring Harness
        • Caterpillar A-III Electronic Engine Control, LH with Electronic Unit Injector Fuel System
          • Rigid Wiring Harness
            • COOLING SYSTEM
              •  Oil cooler
              •  Thermostats and housing, full open temperature 92 C (198 F)
              •  Jacket water pump, gear driven, centrifugal
              •  Auxiliary fresh water pump
              •  Expansion tank
              •  Auxiliary sea water pump, centrifugal, non-self-priming
            • EXHAUST SYSTEM
              •  Dry gas tight exhaust manifolds with heat shields
              •  Dual Turbochargers with watercooled bearings and heat shields
              •  Exhaust outlet, vertical, 203 mm (8 in) round flanged outlet
            • FLYWHEELS & FLYWHEEL HOUSINGS
              •  Flywheel, SAE No. 00, 183 teeth
              •  Flywheel housing, SAE No. 00
            • Flywheel, SAE No. 00, 183 teeth
              • Flywheel housing, SAE No. 00
                • FUEL SYSTEM
                  •  Fuel filter, RH, with service indicators
                  •  Fuel transfer pump
                  •  Electronically Controlled Unit Injectors
                • INSTRUMENTATION
                  •  Overspeed shutdown notification light
                  •  Emergency stop notification light
                  •  Graphical Unit (Marine Power Display) for analog or digital display of:
                • Overspeed shutdown notification light
                  • Emergency stop notification light
                    • Graphical Unit (Marine Power Display) for analog or digital display of:
                      • LUBE SYSTEM
                        •  Crankcase breather, Top mounted
                        •  Oil filter, RH
                        •  Oil filler and dipstick, RH
                        •  500 hours sump oil pan
                        •  Oil pump, gear type
                      • Crankcase breather, Top mounted
                        • Oil filter, RH
                          • Oil filler and dipstick, RH
                            • 500 hours sump oil pan
                              • Oil pump, gear type
                                • MOUNTING SYSTEM
                                  •  Rails, engine mounting, engine length, industrial type, 254 mm (10 in), C-channel
                                • POWER TAKE-OFFS
                                  •  Accessory drive
                                  •  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 operating conditions
                                  •  Emergency stop push button (located in Electronic Instrument Panel) Safety shutoff protection:
                                • A-III 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
                                      •  Paint, Caterpillar Yellow engine with black rails.
                                      •  Lifting eyes
                                      •  NOTE: 1. Engines for heat exchanger cooling do NOT include heat exchanger. 2. When used with competitive generator, a TVA is recommended. An alternative vibration damper may be required. 3. Engine is wired for auto start stop
                                    • CHARGING SYSTEM
                                      •  Battery Chargers
                                      •  Charging Alternators
                                    • CONTROL SYSTEM
                                      •  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)
                                    • 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)
                                        • FUEL SYSTEM
                                          •  Fuel Cooler
                                          •  Fuel priming pumps (LH and RH)
                                          •  Flexible fuel lines
                                          •  Rigid Fuel Lines
                                          •  Primary fuel filter
                                          •  LH Fuel Filter
                                          •  Duplex fuel filters
                                          •  Fuel level switch
                                        • Fuel Cooler
                                          • Fuel priming pumps (LH and RH)
                                            • Flexible fuel lines
                                              • Rigid Fuel Lines
                                                • Primary fuel filter
                                                  • LH Fuel Filter
                                                    • Duplex fuel filters
                                                      • Fuel level switch
                                                        • GENERATORS AND GENERATOR ATTACHMENTS
                                                          •  1500 / 1800 RPM
                                                          •  1000 / 1200 RPM
                                                          •  Low voltage connection
                                                          •  Generator conversion
                                                          •  Low voltage extension box
                                                          •  RFI filter
                                                          •  Bearing temperature detectors (RTD)
                                                          •  Manual voltage control
                                                          •  Air filter
                                                        • INSTRUMENTATION
                                                          •  PL1000T Communication Module
                                                          •  Customer Interface Box
                                                          •  Thermocouples
                                                          •  Remote panel display
                                                          •  Remote cylinder temperature display
                                                        • PL1000T Communication Module
                                                          • Customer Interface Box
                                                            • Thermocouples
                                                              • Remote panel display
                                                                • Remote cylinder temperature display
                                                                  • LUBE SYSTEM
                                                                    •  Deep Sump Oil Pan
                                                                    •  Oil Pan Drain Valve
                                                                    •  Oil Pan Drain Cover
                                                                    •  Emergency Lube Oil Connections
                                                                    •  Sump pumps
                                                                    •  Oil filters
                                                                    •  Lubricating oil
                                                                    •  Lube system
                                                                  • Deep Sump Oil Pan
                                                                    • Oil Pan Drain Valve
                                                                      • Oil Pan Drain Cover
                                                                        • Emergency Lube Oil Connections
                                                                          • Sump pumps
                                                                            • Oil filters
                                                                              • Lubricating oil
                                                                                • Lube system
                                                                                  • MOUNTING SYSTEM
                                                                                    •  Rails
                                                                                  • Rails
                                                                                    • POWER TAKE-OFFS
                                                                                      •  Flywheel Guard
                                                                                      •  Flexible Coupling
                                                                                      •  Coupling Hub
                                                                                      •  Upper Left Hand Front Location
                                                                                      •  Upper Left Hand Rear 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
                                                                                    • MARINE SOCIETY REQUIREMENTS
                                                                                      •  Spray Shielding
                                                                                    • PROTECTION SYSTEM
                                                                                      •  Air inlet shutoffs
                                                                                      •  Switches and contactors
                                                                                      •  Explosion relief valve
                                                                                      •  Oil Temp Sensor
                                                                                      •  Intake Manifold Temp Sensor
                                                                                    • Air inlet shutoffs
                                                                                      • Switches and contactors
                                                                                        • Explosion relief valve
                                                                                          • Oil Temp Sensor
                                                                                            • Intake Manifold Temp Sensor
                                                                                              • SPECIAL APPEARANCE
                                                                                                •  Special appearance packages with chrome covers
                                                                                                •  Chrome plated relief valves
                                                                                                •  Black air cleaners
                                                                                                •  Yacht Class Finish
                                                                                              • STARTING SYSTEM
                                                                                                •  Starting motors or barring divice
                                                                                                •  Air starting motors options
                                                                                                •  Starting aids
                                                                                                •  Battery sets - 24 volt - Dry
                                                                                              • GENERAL
                                                                                                •  Tool set
                                                                                                •  Caterpillar datalink wire
                                                                                              • SVCE TOOLS/SHIP PROT/FACTORY SUPPORT
                                                                                                •  FACTORY COMMISSIONING
                                                                                              • PACKING
                                                                                                •  Shrink wrap protection
                                                                                                •  Shrink wrap protection - generator
                                                                                                •  Storage preservation with glycol solution/vapor corrosion inhibitor
                                                                                                •  Storage preservation with vapor corrosion inhibitor
                                                                                                •  Export packaging
                                                                                                •  AID emblem
                                                                                              • EXHAUST SYSTEM
                                                                                                •  Horizontal Exhaust
                                                                                                •  Flexible fittings
                                                                                                •  Elbows
                                                                                                •  Flanges
                                                                                                •  Flange and exhaust expanders
                                                                                                •  Mufflers
                                                                                              • Horizontal Exhaust
                                                                                                • Flexible fittings
                                                                                                  • Elbows
                                                                                                    • Flanges
                                                                                                      • Flange and exhaust expanders
                                                                                                        • Mufflers
                                                                                                          • AIR INLET SYSTEM
                                                                                                            •  Remote Air Inlet Adapters
                                                                                                          • Remote Air Inlet Adapters
                                                                                                            • COOLING SYSTEM
                                                                                                              •  Water level switch gauge
                                                                                                              •  Coolant level sensors
                                                                                                              •  Connections
                                                                                                              •  Radiator cooling conversion
                                                                                                              •  Keel Cooling Conversions
                                                                                                              •  Heat exchangers
                                                                                                              •  Auxiliary water pumps
                                                                                                              •  Sea water pump removal
                                                                                                              •  Air separator
                                                                                                            • Water level switch gauge
                                                                                                              • Coolant level sensors
                                                                                                                • Connections
                                                                                                                  • Radiator cooling conversion
                                                                                                                    • Keel Cooling Conversions
                                                                                                                      • Heat exchangers
                                                                                                                        • Auxiliary water pumps
                                                                                                                          • Sea water pump removal
                                                                                                                            • Air separator
                                                                                                                              Built for it