101

TECHNICAL DATA

Note: EMD E 23 engines were formerly EMD 710 Series. INT equals Intermittent Service

Rating. CS equals Continuous Service Rating. 750 rpm (50 Hz) and dual fuel options are

available. Contact local dealer for detail.

Model Cylinders Rating bkWbhp rpm g/bkW-hr IMO U.S. g/h EPA

8 E 23 8 CS 1491 2000 900 201 II 93 T3

12 E 23 12 CS 2237 3000 900 198 II 138 T3

16 E 23 16 CS 2983 4000 900 196 II 182 T3

20 E 23 20 CS 3729 5000 900 209 II 236 T3

8 E 23 8 INT 1641 2200 900 200 II 103 T3

12 E 23 12 INT 2461 3300 900 197 II 152 T3

16 E 23 16 INT 3281 4400 900 195 II 201 T3

20 E 23 20 INT 4101 5500 900 210 II 261 T3

(shown with accessory rack)

102

E 23B

DIMENSIONS (mm) AND WEIGHTS (kg)

Type A B C D E F G H

Engine

Weight

AAcc.

Rack

Weight

8 E 23B 3533 2573 479 2740 2034 1864 5572 1038 14808 3562

12 E 23B 3685 2764 632 2836 2034 2734 6591 1143 19608 3562

16 E 23B 3685 2764 632 2836 2034 3715 7548 1143 21339 3904

DIMENSIONS (in) AND WEIGHTS (lb)

Type A B C D E F G H

Engine

Weight

Acc.

Rack

Weight

8 E 23B 139.1 101.3 18.9 107.9 80.1 73.4 219.4 40.9 32646 7853

12 E 23B 145.1 108.8 24.9 111.7 80.1 107.6 259.5 45.0 43228 7853

16 E 23B 145.1 108.8 24.9 111.7 80.1 146.3 297.2 45.0 47044 8607

Note: Completely Integrated System

A

B D

C

H F

G

E

E 23B Enhancements:

• IMO III and U.S. EPA Tier 4 Final

• Completely integrated SCR System – no need to worry about

mounting or where to place it in the engine room

• Closed Crankcase

• High pressure lube oil system

• Mechanical oil filtration with centrifuge

• Next generation Accessory Rack

103

TECHNICAL DATA

Model Cylinders Rating bkWbhp rpm IMO EPA EU

8 E 23B 8 CS 1491 2000 900 III T4F NC

12 E 23B 12 CS 2237 3000 900 III T4F NC

16 E 23B 16 CS 2983 4000 900 III T4F NC

20 E 23B* 20 CS 3729 5000 900 III T4F NC

8 E 23B 8 INT 1641 2200 900 III T4F NC

12 E 23B 12 INT 2461 3300 900 III T4F NC

16 E 23B 16 INT 3281 4400 900 III T4F NC

20 E 23B* 20 INT 4101 5500 900 III T4F NC

Note: INT equals Intermittent rating *

Contact your local dealer for details

104 • EMDEC/CAT ADEM Engine control module, including

EUI injectors, wiring harness and sensors.

• Fuel pump, duplex spin-on primary filters/bypass, and manual

priming pump.

• Single oil pump, cooler, strainer, centrifuge, self-cleaning filter,

turbocharger primary and soakback filter

• Gear-driven HT and LT centrifugal coolant pumps and automatic

thermostatic valves

• Single-stage scavenging air turbocharger with two (2)

aftercoolers.

• Individual cylinder exhaust thermocouples and exhaust manifold

thermal blankets (SOLAS)

• SCR Module, DEF dosing cabinet, DEF mixing tube, and flex

connections

• Air start system • Marine society certifications • Alarm & Protection panels and remote displays • Power takeoff (free end). • Main bearing thermocouples • Vibration isolation mounts • Torsional Vibration Analysis. • Custom color finish paint (cement gray standard). • Engine-driven sea water pump • Oil mist detection • Water expansion tanks (HT & LT) • Close-coupled intake air filter

Continuous Service Rating is suitable for continuous duty

applications with no limit on operating hours at maximum load.

Intermittent Rating is suitable for continuous duty applications

involving varying loads. Maximum engine power produced is limited

by application guidelines, leaving a power reserve for intermittent

operating conditions. Operating time at loads above the Continuous

Service Rating is limited to one hour in 12 or 8% of total operating

hours.

Standard Equipment

Options

Rating Definitions and Conditions

107

GLOSSARY

106

U.S. Environmental Protection Agency (EPA), Transport Canada,

China Ministry of the Environment and the European Union have

enacted programs to reduce emissions from all domestic diesel

vessels. International vessels are subject to the requirements of the

country where the vessel is registered (flagged) and if regulated,

typically follow the requirements of the International Maritime

Organization (IMO).

Caterpillar Marine has a key focus on emissions regulations to

ensure that our marine engines meet global requirements.

We’ve long been a leader in solving environmental challenges,

allowing customers to focus on business progress.

U.S. EPA Standards

U.S. EPA applies for marine diesel engines installed in a variety of

U.S. flagged recreational and workboat vessels.

High Performance Applications:

EPA Tier 3: Cat C7.1, C18 & C32

Commercial Applications:

EPA Tier 3: Cat C1.5, C2.2, C4.4, C7.1, C9.3, C15, C18, C32

(< 600 kW)

EPA Tier 4: Cat C32, 3500, C280

(> 600 kW)

Emissions Standards

U.S. EPA Regulations

NC Not U.S. EPA Marine Certified for use in the U.S. or

Canada.

T3C Meets U.S. EPA Marine Tier 3 Commercial standards.

T3R Meets U.S. EPA Marine Tier 3 Recreational standards.

T3CR Meets U.S. EPA Marine Tier 3 Commercial standards

and U.S. EPA Marine Tier 3 Recreational standards.

T4C Meets U.S. EPA Marine Tier 4 Final Commercial

standards.

Emergency Meets U.S. EPA Marine Tier 2 or Tier 3, as applicable,

that otherwise must meet Tier 4 Final.

Canada Regulations

As of January 1, 2016, Category 2 engines (7 to 30 L/cylinder) on

Canadian flagged vessels must meet U.S. EPA requirements or have

an equivalent certificate that has been provided by another country.

Unless otherwise exempted, all other marine engines must meet

IMO requirements for vessels constructed after January 1, 2016

(IMO III). Engines on vessels with keel laid in 2017 with combined

propulsion power < 750 kW must meet IMO II and are exempt from

IMO III: the IMO III exemption is subject to review by December 31,

2022.

China Regulations

China Domestic Marine regulation (GB15097) China Stage II went

into effect after July 1, 2022. International vessels subject to the

requirements of IMO and are not subject to China Domestic

Marine regulations.

Engine Certification Descriptions

C-II Engines meeting China inland water regulations.

107

108

IMO Certification

The International Maritime Organization (IMO) regulates exhaust

gas emissions on diesel engines > 130 kW. Since January 1, 2011

the IMO has regulated NOx exhaust emission to their prescribed

IMO II levels except for special emissions control areas or (ECA’s).

There are four NOx emission control areas that are currently

regulated by IMO to stage III. These include the North American

ECA, U.S. Caribbean ECA, North Sea ECA, and the Baltic Sea ECA.

Vessels that operate within these ECA’s must be compliant with IMO

III. Engines that are used for emergency power are not subject to

IMO regulations.

109

EU Certification

Commercial Craft Directive 2016/1628 (EU Stage V)

This directive is in effect and applies to all propulsion and auxiliary

engines. Caterpillar has certified some engines with a rated power

of greater than 560 bkW to this standard. Most of these are to be

used for inland waterway vessels. These engines also became

effective by reciprocity agreement with CCNR Stage II, on July 1,

2007. (97/68 directive was repealed January 1, 2017 although 97/68

(IIIA) standards apply to marine engines until Stage V came into effect

January 1, 2019 for < 300 kW and January 1, 2020 for > 300 kW and all

references to 97/68 are now references to EU 2016/1628 (Stage V)).

Engine Certification Descriptions

IW Meets EU Directive 2016/1629 Technical Requirements

for Inland Waterway.

NC Not Certified for specific regulations.

NST Engines < 19 kW are not subject to EU Directive 2016/1629.

RCD Recreational Craft Directive, meets 2013/53/EU.

This directive is in effect and applies to all recreational

engines used in the European Union areas.

EUV Engines meeting Stage V.

110

Rating definitions provide guidelines to help determine the

appropriate rating for specific applications based on vessel

operation. Cat marine propulsion engine rating applications for C9

through 3516E are based on load factor, time at full throttle, and

operational hours per year.

Contact your local Cat dealer for assistance in determining the

appropriate rating for your specific application.

A Rating (Unrestricted Continuous)

Typical applications: For vessels operating at rated load and

rated speed up to 100% of the time without interruption or load

cycling (80% to 100% load factor).

Typical operation ranges from 5000 to 8000 hours per year.

For C280-6, C280-8, C280-12 and C280-16

Engines Only:

Continuous Service (CS) Rating is suitable for continuous duty

applications, including dredges, for operation without interruption

or load cycling.

B Rating (Heavy Duty)

Typical applications: For vessels operating at rated load and

rated speed up to 80% of the time with some load cycling (40% to

80% load factor).

Typical operation ranges from 3000 to 5000 hours per year.

C Rating (Maximum Continuous)

Typical applications: For vessels operating at rated load and

rated speed up to 50% of the time with cyclical load and speed

(20% to 80% load factor).

Typical operation ranges from 2000 to 4000 hours per year.

Marine Rating Definition

Propulsion Engines

For C280-6, C280-8, C280-12, C280-16, and EMD E 23

Engines Only:

Maximum Continuous (MC) Rating or EMD Intermittent rating

is generally used for vessel applications involving varying loads.

The engine power actually produced is limited by application

guidelines, leaving a power reserve for unusual operating

conditions. Operating time at loads above the Continuous Service

Rating for a given rpm is limited to one hour in 12 or 8.3% of total

operating hours.

FCVR – Fast Commercial Vessel Rating: 85% of operating hours

at rated speed, 15% of hours at less than 50% rated power. TBO

approximately 20,000 - 25,000 hours. The propulsion system

design should consider heavy ship condition, sea state, hull

fouling and propulsion system power losses for proper match

between engine and prop/jet.

D Rating (Intermittent Duty)

Typical applications: For vessels operating at rated load and

rated speed up to 16% of the time (up to 50% load factor).

Typical operating ranges from 1000 to 3000 hours per year.

E Rating (High Performance)

Typical applications: For vessels operating at rated load and

rated speed up to 8% of the time (up to 30% load factor).

Typical operation ranges from 250 to 1000 hours per year.

DEP Ratings (Diesel Electric Propulsion, Electric Drive)

Typical applications: For vessels operating with generator sets

that provide power to the propulsion systems. All ratings are

Prime Ratings according to ISO 8528-1 for unlimited usage per

year at a load factor of < 70%. 10% overload capability is required

for a maximum of 1 hour out of every 12 and a maximum of 25

hours total per year.

Typical applications could include but are not limited to supply

vessels, cruise vessels, research vessels, or any other ship

using diesel electric drive systems.

111

112

Rating Conditions for 3500s and Smaller Engines

Ratings are based on SAE J1228 standard conditions of 29.61 in

Hg (100 kPa) and 77° F (25° C). These ratings also apply at ISO3046-

1:2002E, ISO8665, DIN6271-3, and BS5514 conditions of 29.61 in Hg

(100 kPa), 81° F (27° C) and 60% relative humidity.

Caterpillar maintains ISO9001:2000 certified quality management

systems for engine test facilites to assure accurate calibration

of test equipment. Electronically controlled engines are set at

the factory at the advertised power corrected to standard ambient

conditions. The published fuel consumption rates are in

accordance with ISO3046-1:2002E.

Fuel consumption is based on SAE J1995 with +/- 3% tolerance

at rated power for fuel having an LHV of 18,390 Btu/lb

(42,780 kJ/kg) when used at 84.2° F (29° C) and weighing

7.001 lb/U.S. gal (838.9 g/L). Additional ratings may be

available for specific customer requirements.

Consult your Cat representative for details.

Rating Conditions for C280 Engines

Ratings are based on SAE J1349 standard conditions of 29.61

in Hg (100 kPa) and 77° F (25° C). These ratings also apply at

ISO3046-1:2002E, ISO8665, DIN6271-3, and BS5514 standard

reference conditions. Ratings also meet classification society

maximum temperature requirements of 113° F (45° C) temperature

to turbo and 90° F (32° C) seawater temperature without derate.

Fuel consumption is based on ISO3046/1 with +5% tolerance

at rated power for fuel having an LHV of 18,390 Btu/lb

(42,780 kJ/kg) and weighing 7.001 lbs/U.S. gal (838.9 gal/liter).

Includes engine mounted fresh water and lube oil pumps.

BSFC without pumps, 2% less

Additional ratings may be available for specific customer

requirements. Consult your Cat representative for details.

Performance Data

Performance along a typical fixed pitch propeller curve with a 3.0

exponent.

Power rated in accordance with NMMA procedure as crankshaft

power. For units equipped with Caterpillar supplied marine gears,

reduce crankshaft power by 3% for propeller shaft power.

113

Caterpillar has offered packaged power systems for over 70 years.

We assure power and performance ratings, as advertised, through

extensive factory testing.

Cat generator sets typically exceed NEMA and IEEE standards for

load acceptance. All rotor designs have been type tested at 150%

overspeed for two hours at 338° F (170° C) ambient temperature.

Rating Definition

All Cat marine auxiliary engines and generator sets are rated for

prime power for continuous electric service according

to ISO 8528-1.

Hours per Year Unlimited

Load Factor < 70%

Overload Capacity + 10%

maximum of 1 hour in 12

maximum of 25 hours per year

Rating Conditions

Ratings are based on SAE J3046 and J1349 standard conditions

of 29.61 inHg (100 kPa) and 77° F (25° C). These ratings also apply

at ISO8665, ISO3046-1:2002E, DIN6271-3, and BS5514 standard

conditions of 29.61 in. Hg (100 kPa), 81° F (27° C), and 60% relative

humidity.

Fuel rates are based on fuel oil of 35° API [60° F (16° C)] gravity

having an LHV of 18,390 Btu/lb (42 780 kJ/kg) when used at 85° F

(29° C) and weighing 7.001 lbs/U.S. gal. (838.9 gal/L).

Marine Auxiliary Engines are mainly used as generator set engines;

however, they can be used for electrically driven pumps, winches,

conveyors, thrusters, when it is specified. Engines can be radiator

cooled or heat exchanger/keel cooled.

Marine Rating Definition Generator

Sets and Auxiliary Engines

bhp Brake Horsepower

bkW Brake Kilowatts

CEM Clean Emission

Module

DEF Diesel Exhaust Fluid

DIN German Standards

Organization

DF Dual Fuel

ekW Electrical Kilowatts

EPA Environmental

Protection Agency

EU European Union

EUI Electronic Unit

Injection

g/bkWh Grams per Brake

Kilowatt Hour

H Height of Engine

HE Heat Exchanger

Cooled

IMO International Maritime

Organization

ISO International

Standards

Organization

kVA Kilovolt-Ampere

L Overall Engine Length

LE Length of Engine from

Front of Engine to

Rear Face of Flywheel

Housing

LG Length of Engine with

Gear/Generator

MCS Marine Control

System

mhp Metric Horsepower

NA Naturally Aspirated

R Radiator Cooled

SAE Society of Automotive

Engineers

SCAC Separate Circuit

Aftercooled

SCR Selective Catalytic

Reduction

T Turbocharged

TA Turbocharged,

Aftercooled

TSA Turbocharged,

Supercharged,

Aftercooled

TTA Twin Turbo

Aftercooled

U.S. gal/h U.S. Gallons

per Hour

W Overall Width

WE Width of Engine

114

Abbreviations

115

Global Dealer Network

Caterpillar’s global dealer network has broad capabilities and has

a strong global presence, ensuring customer access to complete

solutions for your equipment needs. From people at the local branch

to those at the corporate level – we offer global support at the

local leve. Service locations offer dealer personnel who know and

understand their local market, their customers, and their customers’

businesses.

Cat dealer field service capability is second to none. Your uptime is

maximized with the fastest response time available, and qualified,

experienced field service technicians with the expertise and

equipment to quickly diagnose and fix problems. Our technicians

know Cat products and solutions, and deliver the same world-class

support to you – wherever and whenever you need it.

To find your nearest dealer, please visit:

https://www.cat.com/en_US/support/dealer-locator.

html

HEADQUARTERS

Caterpillar Marine

10203 Sam Houston Park Dr

Houston, TX 77064/USA

EUROPE, AFRICA, MIDDLE EAST

Caterpillar Marine

Große Elbstraße 279 a

22767 Hamburg/Germany

Caterpillar Marine Power UK Ltd.

22 Cobham Road

Wimborne

Dorset

BH21 7 PW

United Kingdom

ASIA-PACIFIC

Caterpillar Marine Trading

(Shanghai) Co., Ltd

19/F, Caterpillar Marine Center

1319, Yan’an West Road

200050 Shanghai/P.R. China

Caterpillar Marine Asia Pacific

Pte Ltd

No. 5 Tukang Innovation Grove

Singapore 618304

Republic of Singapore

Caterpillar Marine

116

Notes

© 2023 Caterpillar. All Rights Reserved. CAT, CATERPILLAR, LET’S DO THE WORK, their respective logos,

\"Caterpillar Yellow\", the \"Power Edge\" and Cat “Modern Hex” trade dress as well as corporate and product

identity used herein, are trademarks of Caterpillar and may not be used without permission.

LEDM3457-29

For more information

please visit:

www.cat.com/marine