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® C7

MARINE PROPULSION

375 mhp (370bhp) 276 bkW

Image shown may not reflect

actual Engine

SPECIFICATIONS

I-6, 4-Stroke-Cycle-DieselEmissions......................................................................IMODisplacement............................................. 7.2 L (442 cu in)Rated Engine Speed....................................................2600Bore.......................................................... 110 mm (4.33 in)Stroke......................................................... 127 mm (5.0 in)Aspiration................................... Turbocharged-AftercooledGovernor.............................................................. ElectronicCooling System..........................................Heat ExchangerWeight, Net Dry (approx.)Refill CapacityCooling System.....................................39 L (10.3 U.S. gal)Lube Oil System..................................... 25 L (6.6 U.S. gal)Oil Change Interval.................................................. 150 hrs

Caterpillar Diesel Engine Oil 10W30 or 15W40

Rotation (from flywheel end)....................CounterclockwiseFlywheel and Flywheel Housing.........................SAE. No. 3Flywheel Teeth...............................................................126

STANDARD ENGINE EQUIPMENT

Air Inlet System

Sea water aftercooler, 12-volt air inlet heater, air cleanerwith fumes disposal (closed system)

Charging System

12V 51 amp belt driven charging alternator andmounting

Cooling SystemGear driven auxiliary sea water pump, belt drivencentrifugal jacket water pump, auxiliary sea water lines,expansion tank, transmission oil cooler, engine-mountedheat exchanger with removable tube bundle andreplaceable copper-nickel tubes, block heater,thermostat and housing

Exhaust System

Watercooled exhaust manifold and turbocharger, fumesdisposal routed to turbocharger inlet

Fuel System

Hydrdaulic Electronic Unit Injection (HEUI), fuel transferpump, fuel priming pump, fuel filter - RH or LH service

Lube System

Crankcase breather, oil filter - front center service, oillevel gauge - RH or LH service, oil filler - RH or LHservice, oil pan drain - RH or LH service, gear drivenengine oil pump

Mounting System

Front mount is included and provides a mounting surface

of 1 mm (.04 in) below the centerline of the engineFront mount is not included (Do not use shipping mountsin permanent installation.)

Protection System

Electronic overspeed shutoff

Starting System

12V rear facing electric starting motor

General

Vibration damper and guard, Caterpillar yellow paint,lifting eyes

ISO Certification

Factory-designed systems built at CaterpillarISO 9001:2000 certified facilities

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®

C7   MARINE PROPULSION

375 mhp (370 bhp) 276 bkW

PERFORMANCE CURVES

D-RATING - DM7591-00

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

2600 276 1014 235.5 77.5

2500 276 1054 232.2 76.4

2400 276 1098 229.1 75.4

2300 276 1146 226.2 74.4

2200 276 1198 223.4 73.5

2100 276 1255 220.8 72.7

2000 276 1318 218.9 72.0

1900 276 1387 218.7 71.9

1800 276 1464 221.3 72.8

1700 276 1550 226.7 74.6

1600 233 1388 232.3 64.4

1500 189 1203 236.4 53.2

1400 145 990 238.6 41.3

1200 96 766 243.5 27.9

1000 69 662 254.9 21.0

Prop Demand DataEngine

Speed rpmEngine

Power kWEngine

Torque N·mBSFC

g/kW-hrFuel Rate

L/hr

2600 276 1014 235.5 77.5

2500 245.4 937 233.9 68.4

2400 217.1 864 231.3 59.8

2300 191.1 793 227.1 51.7

2200 167.2 726 222.8 44.4

2100 145.4 661 219.3 38.0

2000 125.6 600 220 32.9

1900 107.7 541 223.7 28.7

1800 91.6 486 228.3 24.9

1700 77.2 433 233.1 21.4

1600 64.3 384 238.1 18.3

1500 53 337 244.2 15.4

1400 43.1 294 252.7 13.0

1200 27.1 216 270 8.7

1000 15.7 150 284.3 5.3

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

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®

C7   MARINE PROPULSION

375 mhp (370 bhp) 276 bkW

DIMENSIONS

Right Side Front

Engine Dimensions

(1) Length to Flywheel Housing 1170.8 mm 46.09 in

(2) Width 919.8 mm 36.21 in

(3) Height 928.2 mm 36.54 in

Weight, Net Dry (approx) 0 kg 0 lb

Note: Do not use for installation design. See generaldimension drawings for detail (Drawing # 2519636 ).

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®

C7   MARINE PROPULSION

375 mhp (370 bhp) 276 bkW

RATING DEFINITIONS AND CONDITIONS

D Rating (Intermittent Duty) -% Load Factor: up to 50

% Time at Rated RPM: up to 16Typical Time at Full Load: 2 hours out of 12Typical Hour/Year: 1000 to 3000Typical Applications: For vessels operating at rated loadand rated speed up to 16% of the time (up to 50% loadfactor). Typical applications could include but are notlimited to vessels such as offshore patrol boats,customs boats, police boats, some fishing, fireboats, orharbor tugs. Typical operation ranges from 1000 to3000 hours per year.

Powerat declared engine speed is in accordance with

ISO3046-1:2002E. 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 ISO3046-1:2002E.

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.

Performance No.: DM7591-00

Feature Code: C07MC05

U.S. Sourced

15186807

27 August 2009

©2009 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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®

C7   MARINE PROPULSION

375 mhp (370 bhp) 276 bkW

Performance DataD-RATING - DM7591-00 Aftercooler Temperature 30.0 ºC (86.0 ºF)

Metric

EngineSpeed rpm

EnginePower kW

BSFCg/kW-hr

Fuel RateL/hr

Intake ManfPress kPa

Intake AirFlow

m3/min

Exh ManifTemp ºC

Exh GasFlow m3/min

EngineTorque N

Zone Limit Curve:4   2600 276 235.5 77.5 220.7 26 622 60.5 1,014

2300 261.5 226.2 70.5 206.2 22.9 623 53.3 1,086

2100 241.6 219 63.1 173.8 19.1 623 45.5 1,099

1800 182.7 213.8 46.6 96.0 11.7 623.4 29.5 969

1500 128.1 225.8 34.5 52.0 7.8 623.1 20.5 816

1000 69.3 254.9 21.0 17.4 4 577.1 10 662

Prop Demand Data:   2600 276 235.5 77.5 220.7 26 622 60.5 1,014

2300 191.1 227.1 51.7 143.5 18.3 540.6 40.3 793

2100 145.4 219.3 38.0 84.0 12.8 490.1 27.6 6611800 91.6 228.3 24.9 35.5 8.3 445.7 17.5 486

1500 53 244.2 15.4 15.1 5.9 358.9 11.3 337

1000 15.7 284.3 5.3 1.7 3.3 206.7 4.9 150

Max Power Data:   2600 276 235.5 77.5 220.7 26 622 60.5 1,014

2300 276 226.2 74.4 216.0 23.6 638 55.6 1,146

2100 276 220.8 72.7 206.7 21.3 660.1 52.1 1,255

1800 276 221.3 72.8 200.9 18.5 743.9 49.9 1,464

1500 188.9 236.4 53.2 106.2 11 772 32.2 1,203

1000 69.3 254.9 21.0 17.4 4 577.1 10 662

Break Mean Effective Pressure.....................................................................................................1759 kPa

Heat Rejection to Coolant (total)..................................................................................................... 199 kW

Heat Rejection to Aftercooler.............................................................................................................77 kW

Heat Rejection to Exhaust (total).....................................................................................................240 kW

Heat Rejection to Atmosphere from Engine.....................................................................................41 kW

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

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®

C7   MARINE PROPULSION

375 mhp (370 bhp) 276 bkW

Performance DataD-RATING - DM7591-00 Aftercooler Temperature 30.0 ºC (86.0 ºF)

English

EngineSpeed rpm

EnginePower hp

BSFClb/hp-h

Fuel Rategph

Intake ManfPress in-hg

Intake AirFlow cfm

Exh ManifTemp ºF

Exh GasFlow cfm

EngineTorque lb

Zone Limit Curve:4   2600 370 0.387 20.5 65.4 918.2 1,152 2,136.5 748

2300 351 0.372 18.6 61.1 808.7 1,153 1,882.3 801

2100 324 0.36 16.7 51.5 674.5 1,153 1,606.8 811

1800 245 0.351 12.3 28.4 413.2 1,154 1,041.8 715

1500 172 0.371 9.1 15.4 275.5 1,154 724 602

1000 93 0.419 5.5 5.2 141.3 1,071 353.1 488

Prop Demand Data:   2600 370 0.387 20.5 65.4 918.2 1,152 2,136.5 748

2300 256 0.373 13.7 42.5 646.3 1,005 1,423.2 585

2100 195 0.361 10.0 24.9 452 914 974.7 488

1800 123 0.375 6.6 10.5 293.1 834 618 3581500 71 0.401 4.1 4.5 208.4 678 399.1 249

1000 21 0.467 1.4 0.5 116.5 404 173 111

Max Power Data:   2600 370 0.387 20.5 65.4 918.2 1,152 2,136.5 748

2300 370 0.372 19.7 64.0 833.4 1,180 1,963.5 845

2100 370 0.363 19.2 61.2 752.2 1,220 1,839.9 926

1800 370 0.364 19.2 59.5 653.3 1,371 1,762.2 1,080

1500 253 0.389 14.1 31.4 388.5 1,422 1,137.1 887

1000 93 0.419 5.5 5.2 141.3 1,071 353.1 488

Break Mean Effective Pressure........................................................................................................255 psi

Heat Rejection to Coolant (total)......................................................................................... 11317 Btu/min

Heat Rejection to Aftercooler.................................................................................................4379 Btu/min

Heat Rejection to Exhaust (total).........................................................................................13649 Btu/min

Heat Rejection to Atmosphere from Engine.........................................................................2326 Btu/min

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C7   MARINE PROPULSION

375 mhp (370 bhp) 276 bkW

27 August 2009 1:44 AM

Technical Data

Feature Code : C07MC05 DM7591-00

Specifications

Number of cylinders & arrangement In-line 6Cycle 4-StrokeCombustion system Direct InjectionAspiration type Turbocharged Aftercooled

Bore 110.0 mm 4.33 inStroke 127.0 mm 5.0 in

Displacement 7.24 L 441.81 in3

Compression ratio 16.0:1

Firing order 1-5-3-6-2-4Rotation (from flywheel end) CCWAftercooling type SCAC

Exhaust manifold type WET

Air Intake SystemAir intake flow rate 26.0 m³/min 918.2 cfm

Maximum air filter intake temperature 49 º C 120 º FMaximum intake restriction with clean filter 3.70 kPa 14.90 in. water

Maximum intake restriction with dirty filter 6.5 kPa 26.1 in. water

Cooling SystemCooling system type Heat Exchanger

Engine only cooling system capacity (includes heat exchanger) 0.0 L 0.0 galMaximum sea water inlet temp

Emissions

Certification Agency (EPA, CCNR, IMO) IMO

Exhaust SystemMaximum system backpressure(at rated power) 10.00 kPa 40.20 in. water

Exhaust flow rate(at rated power) 60.5 m³/min 2,136.5 cfmExhaust stack temperature(at rated power) 384.9 º C 724.8 º F

Maximum static bending moment on exhaust connection 27 N·m 20 lb ft

Heat RejectionHeat rejection to atmosphere from engine(at rated power) 41 kW 2,332 Btu/min

Heat rejection from exhaust(at rated power) 240 kW 13,649 Btu/minHeat rejection to jacket water(at rated power) 199 kW 11,317 Btu/min

Fuel System

Governor type ElectronicFuel system type Hydraulic electronic unit injection

Normal fuel pressureMaximum fuel temperature (at transfer pump inlet 52 º C 126 º F

Maximum fuel supply restriction 14.00 kPa 4.10 in. HgMaximum fuel return line restriction 70.00 kPa 20.70 in. HgMaximum fuel flow to transfer pump 168 L/hr 44 Gal/hr

Maximum fuel transfer pump lift (without priming pump)

Lube SystemRefill volume with filter change (standard equipment) 25.0 L 6.6 gal

Minimum oil pressure at rated speed 180 kPa 26 psiMinimum oil pressure at low idle 100 kPa 15 psi

Crankcase ventilation type CLOSED

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C7   MARINE PROPULSION

375 mhp (370 bhp) 276 bkW

27 August 2009 1:44 AM

Mounting SystemCenter of gravity dimensions (x) 392 mm 15 in

Center of gravity dimensions (y) 169 mm 7 in

Center of gravity dimensions (z) 27 mm 1 inMaximum dynamic axial force on crankshaftFlywheel housing size (standard equipment) SAE NO. 3Maximum installation angle 10 Degrees 10 Degrees

Maximum operating angle (any direction) 30 Degrees 30 DegreesMass moment of inertia (x) 3,160 N.m sec² 27,968 lb in sec²

Mass moment of inertia (y) 4,600 N.m sec² 40,713 lb in sec²Mass moment of inertia (z) 6,380 N.m sec² 56,468 lb in sec²

Weight (dry)Weight (wet)

Electric Starting System

Recommended battery capacity (CCA) above 0 deg C 650 CCA 650 CCA

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