® MARINE C18MARINE PROPULSION

486 mhp (479bhp) 357 bkW

Image shown may not reflectactual Engine

SPECIFICATIONSI-6, 4-Stroke-Cycle-DieselDisplacement......................................... 18.1 L (1106 cu in)Rated Engine Speed....................................................1800Bore......................................................... 145.0 mm (5.7 in)Stroke...................................................... 183.0 mm (7.2 in)Aspiration................................... Turbocharged-AftercooledGovernor.............................................................. ElectronicCooling System.......................................... Heat ExchangerWeight, Net Dry (approx.)...................... 1,673 kg (3,688 lb)Refill Capacity

Cooling System........................................45 L (12 Gal)Lube Oil System.......................................49 L (13 Gal)Caterpillar Diesel Engine Oil 10W30 or 15W40

Rotation (from flywheel end)....................CounterclockwiseFlywheel and Flywheel Housing..........................SAE No. 1Flywheel Teeth...............................................................113Maximum Exhaust Backpressure. 10.0 kPa (40.2 in. water)

STANDARD ENGINE EQUIPMENT

Air Inlet SystemCorrosion resistant aftercooler core, light duty aircleaner (open system)Cooling SystemSelf priming auxiliary sea water pump with rubberimpeller, gear driven jacket water pump, titanium plateheat exchanger with expansion tank, coolant recoverysystem, thermostat and housingExhaust SystemWatercooled exhaust manifold and turbocharger, roundflanged outletFuel SystemFuel priming pump, fuel transfer pump, fuel filter - RH orLH service, flexible fuel linesInstrumentation24V instrument panel with electric service meter,start/stop switch, emergency stop button, maintenancedue lamp, diagnostic lamp, warning lamp, maintenanceclear switch, 15A and 3A breakers, and starter motormagnetic switch

Lube SystemCrankcase breather, engine oil cooler, oil filter - RH or LHservice, oil level gauge - RH or LH service, oil filler,shallow oil pan, gear driven oil pumpMounting SystemFront support - adjustablePower Takeoffs11 tooth spline SAE A hydraulic pump drive, two groovecrankshaft pulleyProtection System12 or 24V electronic shutdown (energize-to-run)GeneralVibration damper and guard, Caterpillar yellow paint,lifting eyes, customer wiring connector and service toolconnectorISO CertificationFactory-designed systems built at CaterpillarISO 9001:2000 certified facilities

1Out of Production 10 March 2008 10:20 AM

® MARINE C18 MARINE PROPULSION486 mhp (479 bhp) 357 bkW

PERFORMANCE CURVES

A-RATING - DM9569-00

Engine Power kW

Engine Torque N•m

BSFC g/kW-hr

Engine Speed rpm

Metric

Maximum Power

Prop Demand- - - - - - -

Maximum Power DataEngine

Speed rpmEngine

Power kWEngine

Torque N·mBSFC

g/kW-hrFuel Rate

L/hr

1800 357 1894 211.3 89.91700 357 2006 207.4 88.31600 357 2131 205.4 87.41500 337 2145 204.4 82.11400 316 2155 204.5 77.01300 290 2130 205.5 71.01200 216 1717 206.5 53.11100 169 1464 206.5 41.51000 127 1210 206.1 31.1800 89 1057 205.7 21.7600 60 957 206.4 14.8

Prop Demand DataEngine

Speed rpmEngine

Power kWEngine

Torque N·mBSFC

g/kW-hrFuel Rate

L/hr

1800 357 1894 211.3 89.91700 300.7 1689 212.2 76.11600 250.7 1496 211.3 63.21500 206.6 1315 210.3 51.81400 168 1146 211 42.21300 134.5 988 213.2 34.21200 105.8 842 214.7 27.11100 81.5 707 215.8 21.01000 61.2 585 219.8 16.0800 31.3 374 242.9 9.1600 13.2 210 282.4 4.5

NOTE: Prop demand data is a cubic prop demand curve with 3.0exponent for displacement hulls only.

2 10 March 2008 10:20 AM

® MARINE C18 MARINE PROPULSION486 mhp (479 bhp) 357 bkW

PERFORMANCE CURVES

A-RATING - DM9569-00

Engine Power hp

Engine Torque lb ft

BSFC lb/hp-hr

Engine Speed rpm

English

Maximum Power

Prop Demand

- - - - - - -

Maximum Power DataEngine

Speed rpmEngine

Power hpEngine

Torque lb ftBSFC

lb/hp-hrFuel Rate

gph

1800 479 1397 .347 23.71700 479 1480 .341 23.31600 479 1572 .338 23.11500 452 1582 .336 21.71400 424 1589 .336 20.31300 389 1571 .338 18.81200 289 1266 .339 14.01100 226 1080 .339 11.01000 170 892 .339 8.2800 119 780 .338 5.7600 81 706 .339 3.9

Prop Demand DataEngine

Speed rpmEngine

Power hpEngine

Torque lb ftBSFC

lb/hp-hrFuel Rate

gph

1800 479 1397 .347 23.71700 403 1246 .349 20.11600 336 1103 .347 16.71500 277 970 .346 13.71400 225 845 .347 11.11300 180 729 .351 9.01200 142 621 .353 7.21100 109 521 .355 5.51000 82 431 .361 4.2800 42 276 .399 2.4600 18 155 .464 1.2

NOTE: Prop demand data is a cubic prop demand curve with 3.0exponent for displacement hulls only.

3 10 March 2008 10:20 AM

® MARINE C18 MARINE PROPULSION486 mhp (479 bhp) 357 bkW

RATING DEFINITIONS AND CONDITIONS

A Rating (Unrestricted Continuous) -% Load Factor: 80 to 100% Time at Rated RPM: up to 80Typical Time at Full Load: No LimitTypical Hour/Year: 5000 to 8000Typical Applications: For vessels operating at rated loadand rated speed up to 100% of the time withoutinterruption or load cycling (80% to 100% load factor).Typical applications could include but are not limited tovessels such as freighters, tugboats, bottom dragtrawlers, or deep river tugboats. Typical operationranges from 5000 to 8000 hours per year.

Powerat declared engine speed is in accordance withISO3046-1:2002E. Caterpillar maintainsISO9001:1994/QS-9000 approved engine test facilitiesto assure calibration of test equipment. Electronicallycontrolled engines are set at the factory at theadvertised power corrected to standard ambientconditions. The published fuel consumption rates are inaccordance with ISO3046-1.Fuel ratesare based on fuel oil of 35º API [16ºC (60ºF)] gravityhaving an LHV of 42 780 kJ/kg (18,390 Btu/lb) whenused at 29ºC (85ºF) and weighing 838.9 g/L (7.001lb/U.S. gal). Additional ratings may be available forspecific customer requirements. Consult your Caterpillarrepresentative for additional information.

Performance data is calculated in accordance with tolerances and conditions stated in this specification sheet and isonly intended for purposes of comparison with other manufacturer's engines. Actual engine performance may varyaccording to the particular application of the engine and operating conditions beyond Caterpillar's control.

Power produced at the flywheel will be within standard tolerances up to 49º C (120º F) combustion air temperaturemeasured at the air cleaner inlet, and fuel temperature up to 52º C (125ºF) measured at the fuel filter base. Powerrated in accordance with NMMA procedure as crankshaft power. Reduce crankshaft power by 3% for propeller shaftpower.

4 10 March 2008 10:20 AM

® MARINE C18 MARINE PROPULSION486 mhp (479 bhp) 357 bkW

DIMENSIONS

Right Side Front

Engine Dimensions

(1) Length to Flywheel Housing 1504.8 mm 59.24 in

(2) Width 1029.4 mm 40.53 in

(3) Height 1143.9 mm 45.04 in

Weight, Net Dry (approx) 1673 kg 3,688 lb

Note: Do not use for installation design. See generaldimension drawings for detail (Drawing # 3161755 ).

5 10 March 2008 10:20 AM

® MARINE C18 MARINE PROPULSION486 mhp (479 bhp) 357 bkW

Performance No.: DM9569-00

Feature Code: C18DM49

U.S. Sourced

11953108

10 March 2008

©2008 Caterpillar

All rights reserved.

Materials and specifications are subject to change without notice.

The International System of Units (SI) is used in this publication.

CAT, CATERPILLAR, SAFETY.CAT.COM their respective logos, "Caterpillar Yellow," and thePOWER EDGE trade dress, as well as corporate and product identity used herein, are

trademarks of Caterpillar and may not be used without permission.

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