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3512B Commercial Marine Propulsion Engine

The Cat 3512B marine 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.

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SPECIFICATION SUMMARY
  • Power Range 1100-2250 bhp (820-1678 bkW)
  • Speed Range 1200-1925 rpm
  • Emissions IMO I
  • Aspiration TTA

PRICE (USD)
Call 440-838-7348 for rate information

Power Rating

  • Power Range
    1100-2250 bhp (820-1678 bkW)
  • Power Range
    1100-2250 bhp (820-1678 bkW)

Engine Specifications

  • Speed Range
    1200-1925 rpm
  • Emissions
    IMO I
  • Aspiration
    TTA
  • Bore
    6.7 in
  • Stroke
    7.5 in
  • Displacement
    3158.0 in3
  • Configuration
    Vee 12, 4-Stroke-Cycle Diesel
  • Rotation from Flywheel End
    Counterclockwise or Clockwise
  • Speed Range
    1200-1925 rpm
  • Emissions
    IMO I
  • Aspiration
    TTA
  • Bore
    6.7 in
  • Stroke
    7.5 in
  • Displacement
    3158 in³

Dimensions & Weights

  • Minimum Dry Weight
    14411 lb
  • Minimum Length
    111 in
  • Minimum Height
    71.1 in
  • Minimum Width
    67.1 in
  • Maximum Length
    3067 in
  • Maximum Width
    70.2 in
  • Maximum Height
    82.3 in
  • Maximum Dry Weight
    14411 lb
  • Minimum Dry Weight
    14411 lb
  • Minimum Length
    111 in
  • Minimum Height
    71.1 in
  • Minimum Width
    67.1 in

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

Electronic instrument panel with eight analog gauges, 10 LEDs, and one LCD read-out to display engine operating conditions and fault codes

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.

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

Standard Equipment:

  • Air Inlet System
    • regular duty air cleaners, dual turbochargers, 152 mm (6 in) OD straight connection, corrosion resistant coated separate circuit aftercooler core
  • Control System
    • dual Advanced Diesel Engine Management (ADEM II) modules with electronically controlled unit injectors
  • Exhaust System
    • dry gas-tight exhaust manifolds with thermolaminated heat shields, dual turbochargers with watercooled bearings and thermo-laminated heat shields, vertical exhaust outlet, 203 mm (8 in) ID round flanged outlet
  • Fuel System
    • electronically controlled unit injectors, RH fuel filter with service indicators, fuel transfer pump
  • Instrumentation
    • RH electronic instrument panel with analog gauges and digital display of data for: oil and fuel pressure, oil and fuel filter differential, system DC voltage, exhaust and water temperature, air inlet restriction; digital display only for: tachometer, service meter, fuel consumption (total and instantaneous); start/stop switch
  • Lube System
    • top mounted crankcase breather, deep sump oil pan, RH oil filler and dipstick, RH oil filter, gear type oil pump
  • Mounting System
    • ledge type engine length rails, 203 x 203 mm (8 x 8 in)
  • Power Takeoffs
    • accessory drive on standard rotation engines: lower RH, lower LH; on opposite rotation engines: upper and lower RH and upper and lower LH; twosided front housing
  • Protection System
    • ADEM II Electronic Monitoring System with customer programmable alarm, shutdown, and deration strategies; emergency stop pushbutton
  • General
    • front and rear lifting eyes, Caterpillar yellow paint, vibration damper and guard
  • Flywheel And Flywheel Housing
    • SAE No. 00 flywheel (183 teeth) and SAE No. 00 flywheel housing
  • Cooling System
    • auxiliary fresh water pump on SCAC engines, non-self-priming centrifugal auxiliary sea water pump for heat exchanger engines only, expansion tank, gear-driven centrifugal jacket water pump, oil cooler, keel cooling connections for keel cooled engines, thermostats and housing with 92° C (198° F) full open temperature

Optional Equipment:

  • Air Inlet System
    • Air Cleaner Removal
    • Remote Air Inlet Adapters
  • Charging System
    • Battery Chargers
    • Charging Alternators
  • Control System
    • Throttle Position Sensor
    • Throttle synchronization
  • 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
  • Exhaust System
    • Horizontal 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
  • Instrumentation
    • PL1000T Communication Module
    • PL1000E Communication Module
    • Customer Interface Box
    • Thermocouples
    • Remote panel display
    • Remote cylinder temperature display
    • Pilot house instrument panels
    • Marine gear sensors
    • Engine vision display system
  • Lube System
    • Oil Pan
    • Oil Pan Accessories
    • Sump Pumps
    • Prelubrication Options
    • Lubricating Oil
    • Lube System
  • Mounting System
    • Engine supports
    • Vibration Isolation Mountings
  • Power Take-offs
    • 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
  • Protection System
    • Air inlet shutoffs
    • Switches and contactors
    • Explosion relief valve
    • Sensors
  • Special Appearance
    • Chrome Plated Relief Valves
    • Black Air Cleaners
  • 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