SPECIFICATIONSV-12, 4-Stroke-Cycle-DieselEmissions . . . . . . . . . . . . . . . . . . . . . . . . . . . IMO compliantDisplacement . . . . . . . . . . . . . . . . . . . . . 27 L (1649 cu. in.)Bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 mm (5.4 in.)Stroke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152 mm (6.0 in.)Aspiration. . . . . . . . . . . . . . . . Turbocharged-AftercooledGovernor . . . . . . . . . . . . . . . . . Hydra-mechanical or PSGEngine Weight, Net Dry (approx) . . . . 2835 kg (6250 lb)Capacity for Liquids

Cooling System(engine & radiator) . . . . . . . . . . . 159 L (42.25 U.S. gal)Lube Oil System. . . . . . . . . . . . . . . . . 68 L (18 U.S. gal)

Oil Change Interval . . . . . . . . . . . . . . . . . . . . . . . . . . 500 hrCaterpillar® DEO 10W30 or 15W40

Rotation (from flywheel end) . . . . . . . Counterclockwise

STANDARD EQUIPMENTAir Inlet SystemCorrosion-resistant aftercooler core; regular duty panel-type air cleaner; air cleaner inlet adapter, 152 mm (6 in.)

Cooling SystemEngine mounted radiator, blower fan, fan drive, fanguard; gear driven centrifugal jacket water pump; oilcooler; thermostats and housing with 92°C (198°F) fullopen temperature

Exhaust SystemWatercooled manifold and turbocharger; dry elbow andflange, 203 mm (8 in.)

Flywheel and Flywheel HousingSAE No. 0 (136 teeth)

Fuel SystemFuel priming pump, fuel transfer pump, RH fuel filter,flexible fuel lines

InstrumentsRH instrument panel with oil pressure, watertemperature, and fuel pressure gauges; service meter

Lube SystemRH oil level gauge and oil filter, crankcase breather, oilfiller in valve cover, deep sump oil pan

Mounting SystemRails, 85 mm (3.3 in.) height

GeneralVibration damper, Caterpillar yellow paint, lifting eyes

ACCESSORY EQUIPMENTAir starting motor24V 35 amp, 24V 60 amp alternator32V 60 amp alternatorAlarm contactor — oil pressure, water temperatureDigital tachometerDouble wall fuel lines and drainDuplex fuel filterDuplex oil filter24V or 32V electric gauges24V, 30 or 32V electric starting motor24V electric shutoffs — oil pressure, water

temperature, overspeedExhaust elbows, pipe, flange, flexible fittingsGenerator installation arrangement4- or 8-hole instrument panelLH oil level gaugeMagnetic pickupMechanical shutoffs — oil pressure, water temperatureMechanical tachometer drivePrimary fuel filter/water separatorSolenoid shutoffs — 24V ETR, ETSSpare parts kit

PERFORMANCE DATATurbocharged-Aftercooled

DM6086-00534 bkW (.8 pf) 716 bhp

% load bkW Lph gph

100 534 136.8 36.1

75 395 100.1 26.4

50 264 68.9 18.2

25 136 40.0 10.6

3412CMARINE AUXILIARY

534 bkW(716 bhp)726 mhp

Radiator Cooled

Image may notreflect actual engine

LEHM1575-02 Page 1 of 2

RATING CONDITIONS

DIMENSIONS*mm in.

Overall Length 3377.1 133.0Length from front to rear face of block 2099.5 82.7Length from rear face of block to end of engine 404.1 15.9Length from rear face of block to end of rails 1258.3 49.5

Overall Height 2154.3 84.8Height from crankshaft centerline to top of engine 1576.5 62.1Height from crankshaft centerline to bottom of oil pan 577.8 22.7

Overall Width 1706.0 67.2Width from crankshaft centerline to port side (left side) 853.0 33.6Width from crankshaft centerline to starboard side 853.0 33.6

(right side)

Radiator Front Rearmm in. mm in. mm in.

Customer mounting hole diameter 22.4 0.9 30.5 1.2 30.5 1.2Width from crankshaft centerline to mounting holes 766.8 30.2 368.3 14.5 368.3 14.5Length from rear face of block to mounting holes 1839.1 72.4 1151.3 45.3 998.7 39.3

1969.4 77.5 1251.3 49.3 1098.7 43.32099.5 82.7

*Illustrations and dimensions from drawing: 128-8024.

Engine Performance ParametersPower. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3%Specific Fuel Consumption . . . . . . . . . . . . . . . +3%Fuel Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5%

Ratings are based on SAE J1228/ISO8665standard conditions of 100 kPa (29.61 in. Hg),25°C (77°F), and 30% relative humidity. Theseratings also apply at ISO3046/1, DIN6271/3, andBS5514 conditions of 100 kPa (29.61 in. Hg),27°C (81°F), and 60% relative humidity.

Fuel rates are based on fuel oil of 35° API [16°C (60°F)] gravity having an LHV of 42 780 kJ/kg (18,390 Btu/lb) when used at 29°C(85°F) and weighing 838.9 g/L (7.001 lb/U.S. gal).

Additional ratings may be available for specificcustomer requirements. Consult your Caterpillarrepresentative for additional information.

L W

H

01 01 01

0303

0202

0303

02 02

Right Side Front Footprint

3412C MARINE AUXILIARY534 bkW (716 bhp) 726 mhp

©2007 CaterpillarTMI Reference No.: DM6086-00 All rights reserved.LEHM1575-02 (9-07) Materials and specifications are subject to change without notice.

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

Performance data is calculated in accordance with tolerances and conditions stated in this specification sheet and is only intended for purposes ofcomparison with other manufacturers’ engines. Actual engine performance may vary according to the particular application of the engine andoperating conditions beyond Caterpillar’s control.

CAT, CATERPILLAR, their respective logos, “Caterpillar Yellow” and the POWER EDGE trade dress, as well as corporate and product identity usedherein, are trademarks of Caterpillar and may not be used without permission.