3508B Marine Propulsion Engine

Specifications

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US
Metric

Overview

The 3508B marine propulsion engine features ratings from 578 bkw (786 mhp) to 1118 bkw (1521 mhp). Highlights of this engine include the Advanced Diesel Engine Management System II, Control Monitoring Protection System, Customer Communication Module, and Digital Voltage Regulator. m

Power Rating

Power Range 775-1500 bhp (578-1118 bkW) 775-1500 bhp (578-1118 bkW)

Engine Specifications

Speed Range 1200-1925 rpm 1200-1925 rpm
Emissions IMO I IMO I
Aspiration TTA TTA
Bore 6.7 in 170.0 mm
Stroke 7.5 in 190.0 mm
Displacement 2105.0 in³ 34.5 l
Rotation from Flywheel End Counterclockwise or clockwise Counterclockwise or clockwise
Configuration Vee 8, 4-Stroke-Cycle Diesel Vee 8, 4-Stroke-Cycle Diesel

Dimensions & Weights

Minimum Dry Weight 10181.0 lb 4618.0 kg
Height 71.0 in 1803.0 mm
Width 67.1 in 1703.0 mm
Length 90.9 in 2310.0 mm
Maximum Dry Weight 11499.0 lb 5261.0 mm

Benefits & Features

Electric Unit Injector Fuel System

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

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” Two-Piece Articulated Piston Design

“Deep Crater/Low Crevice Volume” two-piece 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 Camshaft

Larger diameter (98 mm vs. 92 mm bore) camshaft for higher injection pressures, shorter injection durations, and less gear train torsional vibration

Fuel Injection System

Strengthened fuel injection actuation system and rear gear train to maintain reliability and durability while providing higher injection pressures

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 all marine configurations

Separate Circuit or Sea Water Aftercooling

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

Streamlined intake and exhaust manifolds to reduce parasitic pumping losses and increase combustion efficiency

Thermo-laminated heat shields

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

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

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 lastomeric Seals

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

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

Equipment

3508B Standard Equipment

Fuel System

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

Instrumentation

Graphical Unit (Marine Power Display)

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.

3508B Optional Equipment

Charging System

Battery Charger, 10 amp
Charging Alternators