Caterpillar

1. Marine
Engine
3508BMain Propulsion
High Performance
CATERPILLAR®
ENGINE SPECIFICATIONS
V-8, 4-Stroke-Cycle Diesel
Bore — (mm) in . . . . . . . . . . . . . . . . . . . . . . . . 170 (6.7)
Stroke — (mm) in. . . . . . . . . . . . . . . . . . . . . . . 190 (7.5)
Displacement — (L) cu in. . . . . . . . . . . . 34.5 (2105)
Rotation (from flywheel end) . . . . . . . . . ccw or cw
Compression Ratio. . . . . . . . . . . . . . . . . . . . . . . . . . 14:1
Capacity for Liquids — (L) U.S. gal
Cooling System (engine only). . . . . . 102.7 (55)
Lube Oil System (refill) . . . . . . . . . . . . . 102.0 (50)
Oil Change Interval — hrs . . . . . . . . . . . . . . . . . . 250
Engine Weight, Net Dry
(approx) — (kg) lb . . . . . . . . . . . . . . 4623 (10 182)
1119 bkW/1500 bhp/1521 mhp @ 1925 rpm
1044 bkW/1400 bhp/1420 mhp @ 1880 rpm
970 bkW/1300 bhp/1318 mhp @ 1835 rpm
895 bkW/1200 bhp/1217 mhp @ 1785 rpm
Power produced at the flywheel will be within standard tolerances up to 50° C (122° F) combustion air
temperature measured at the air cleaner inlet, and fuel temperature up to 52° C (125° F) measured at the
fuel filter base. Power rated in accordance with NMMA procedure as crankshaft power. Reduce
crankshaft power by 3% for propeller shaft power.
Air Inlet System
Air cleaners, light duty, not installed
Aftercooler core, copper-nickel tubes,
copper fins, for sea water/air
environment
Turbocharger, water-cooled bearing
housings, 152 mm (6 in) OD straight
connection
Control System
Dual Caterpillar ADEM II electronic
engine control modules with
electronically controlled unit
injectors
Cooling System
Air separator (deaerator), shipped loose
Auxiliary sea water pump, self-priming
Coolant shunt tank, not installed
Jacket water pump, gear driven,
centrifugal
Oil cooler
Thermostats and housing, full open
temperature 92° C (198° F)
Exhaust System
Dry gas tight manifold with thermo-
laminated heat shields
Dual turbocharger with watercooled
bearing housing and thermo-
laminated heat shields
Exhaust outlet, vertical, 292 mm
(11.5 in) ID round flanged outlet
Flywheels and Flywheel Housings
Flywheel housing, SAE no. 00
Flywheel, SAE no. 00, 183 teeth
Fuel System
Electronically controlled unit injectors
Fuel filters, dual spin-on, with service
indicators, front mounted
Fuel transfer pump
Instrumentation
Electronic instrument panel
analog gauges for: oil and fuel
pressure, oil and fuel filter
differential, system DC voltage,
exhaust and water temperature,
fuel pressure, air inlet restriction
digital display for: tachometer,
hours, fuel consumption — total
and instantaneous
Lube System
Crankcase breather, top mounted
Oil filler and dipstick, RH
Oil filter, four spin-on, front mounted
Oil pump, gear type
Oil pump, gear type, scavenge
Rear sump oil pan, aluminum
Mounting System
Front trunnion
Rear pads on sides of flywheel
housing
Power Take-Offs
Accessory drive, front housing
standard rotation: lower RH, lower
LH; opposite rotation: upper and
lower RH, lower LH
Front housing, two-sided
Protection System
ADEM II Electronic Monitoring System
with customer programmable
alarm, shutdown, and deration
strategies
Emergency stop pushbutton
General
Lifting eyes, front and rear
Paint, Caterpillar yellow
Vibration damper and guard
Air pressure regulator
Air starting motor
Charging alternator, 24 volt 60 amp,
RH mounted
Coolant shunt tank removal
Crankcase explosion relief valves
Deep sump oil pan for 400-hour oil
change
Dual 24 volt electric starter motors
Duplex fuel and oil filters
Emergency oil connections, requires
deep sump oil pan
Exhaust expander and flange, 305 to
406 mm
Flexible exhaust fitting, 292 mm dia x
305 mm long
Flexible fuel lines
Horizontal exhaust outlet, 292 mm dia
Mounting feet, for rigid mounting on
parallel engine beds
Pilot house instrument panel
Pyrometer and thermocouples,
individual cylinder exh. temps.
Shell and tube-type heat exchanger
Sound isolation mounts, for military/
passenger service
Sump pump
24-volt electric prelube pump
Water level switch gauge
STANDARD EQUIPMENT ACCESSORY EQUIPMENT

2. 3508B MARINE– HIGH PERFORMANCE VESSELS
PERFORMANCE CURVES
Fuel Fuel Fuel Fuel
Speed Power Torque Cons Rate Power Torque Cons Rate
rpm bkW N•m g/bkW-hr L/hr bkW N•m g/bkW-hr L/hr______ ________________________________ ___________________________________
1925 1119 5549 209 278.7 1119 5549 209 278.7
1800 915 4851 203 221.7 1119 5934 206 274.6
1700 770 4327 203 186.4 1088 6112 203 263.8
1600 642 3833 205 156.9 1002 5980 196 234.3
1500 529 3369 209 131.8 898 5717 189 201.9
1400 430 2935 213 109.4 808 5511 184 177.5
1200 271 2156 223 72.0 456 3629 198 107.8
1000 157 1497 234 43.7 210 2005 221 55.3
900 114 1213 241 32.8 168 1783 231 46.3
Fuel Fuel Fuel Fuel
Speed Power Torque Cons Rate Power Torque Cons Rate
rpm bhp lb-ft lb/bhp-hr g/hr bhp lb-ft lb/bhp-hr g/hr______ ________________________________ ___________________________________
1925 1500 4093 .344 73.6 1500 4093 .344 73.6
1800 1226 3578 .334 58.6 1500 4377 .338 72.5
1700 1033 3191 .334 49.2 1459 4508 .334 69.7
1600 861 2827 .337 41.4 1344 4411 .323 61.9
1500 710 2485 .343 34.8 1204 4217 .310 53.3
1400 577 2165 .351 28.9 1084 4065 .303 46.9
1200 363 1590 .367 19.0 612 2677 .326 28.5
1000 210 1104 .385 11.5 282 1479 .363 14.6
900 153 895 .395 8.7 225 1315 .380 12.2
Prop Demand Curve Data Max Power Curve Data
Ehp – Fast patrol craft and fast yachts with low load factors
Engine Speed rpm
Torque
lb-ft
Power
bhp
Cons.Rate
g/hr
L/hrN•mbkW
700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
1075
575
75
6000
750
280
150
20
33752500
3500
4500
1500
500
5
25
45
65
1500
1200
900
600
300
Ehp Rating –1925 rpm
1119 bkW (1500 bhp) 1521 mhp
Fuel Fuel Fuel Fuel
Speed Power Torque Cons Rate Power Torque Cons Rate
rpm bkW N•m g/bkW-hr L/hr bkW N•m g/bkW-hr L/hr______ ________________________________ ___________________________________
1880 1044 5303 207 257.8 1044 5303 207 257.8
1800 916 4861 204 222.3 1044 5539 204 254.3
1700 772 4336 203 186.8 1044 5864 203 252.0
1600 644 3841 205 157.0 958 5718 197 225.2
1500 530 3376 209 131.9 898 5717 190 203.8
1400 431 2941 214 109.9 808 5511 188 180.6
1300 345 2536 219 90.1 568 4172 192 130.1
1200 272 2161 224 72.4 456 3629 200 108.6
1000 157 1500 232 43.4 210 2005 220 55.1
900 115 1215 235 32.1 168 1783 234 46.8
Fuel Fuel Fuel Fuel
Speed Power Torque Cons Rate Power Torque Cons Rate
rpm bhp lb-ft lb/bhp-hr g/hr bhp lb-ft lb/bhp-hr g/hr______ ________________________________ ___________________________________
1880 1400 3911 .340 68.1 1400 3911 .340 68.1
1800 1229 3585 .335 58.7 1400 4085 .336 67.2
1700 1035 3198 .334 49.3 1400 4325 .333 66.6
1600 863 2833 .337 41.5 1285 4217 .324 59.5
1500 711 2490 .343 34.8 1204 4217 .313 53.8
1400 578 2169 .351 29.0 1084 4065 .308 47.7
1300 463 1870 .360 23.8 762 3077 .316 34.4
1200 364 1594 .368 19.1 612 2677 .328 28.7
1000 211 1106 .381 11.5 282 1479 .362 14.6
900 154 896 .386 8.5 225 1315 .384 12.4
Prop Demand Curve Data Max Power Curve Data
Dhp – Patrol craft, fast passenger vessels, and cruising yachts with low load factors.
Engine Speed rpm
Torque
lb-ft
Power
bhp
Cons.Rate
g/hr
L/hrN•mbkW
700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
1075
575
75
6000
750
280
150
20
33752500
3500
4500
1500
500
5
25
45
65
1500
1200
900
600
300
Dhp Rating – 1880 rpm
1044 bkW (1400 bhp) 1420 mhp
TMI — DM1805-01
TMI — DM1803-01
Prop Demand 3.0 Exponent
• Engine Performance Parameters: Power +/- 3%;
Specific Fuel Consumption +/- 3%; Fuel Rate +/- 5%.
•

3. 3508B MARINE – HIGH PERFORMANCE VESSELS
PERFORMANCE CURVES
Fuel Fuel Fuel Fuel
Speed Power Torque Cons Rate Power Torque Cons Rate
rpm bkW N•m g/bkW-hr L/hr bkW N•m g/bkW-hr L/hr______ ________________________________ ___________________________________
1835 970 5045 205 236.8 970 5045 205 236.8
1800 915 4855 204 222.0 969 5143 204 235.4
1600 643 3836 204 156.6 970 5786 198 229.0
1400 431 2937 213 109.5 808 5511 185 177.8
1200 271 2158 223 72.1 456 3629 198 107.8
1000 157 1498 234 43.8 210 2005 221 55.3
700 54 734 252 16.2 113 1542 242 32.6
Fuel Fuel Fuel Fuel
Speed Power Torque Cons Rate Power Torque Cons Rate
rpm bhp lb-ft lb/bhp-hr g/hr bhp lb-ft lb/bhp-hr g/hr______ ________________________________ ___________________________________
1835 1300 3721 .337 62.6 1300 3721 .337 62.6
1800 1227 3581 .335 58.6 1300 3793 .335 62.2
1600 862 2829 .336 41.4 1300 4268 .326 60.5
1400 577 2166 .351 28.9 1084 4065 .303 47.0
1200 364 1592 .367 19.0 612 2677 .326 28.5
1000 210 1105 .385 11.6 282 1479 .363 14.6
700 72 541 .415 4.3 152 1137 .398 8.6
Prop Demand Curve Data Max Power Curve Data
Chp – Fast commercial and passenger vessels and cruising yachts with moderate
load factors (maximum continuous rating).
Engine Speed rpm
Torque
lb-ft
Power
bhp
Cons.Rate
g/hr
L/hrN•mbkW
700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
1075
575
75
6000
750
280
150
20
33752500
3500
4500
1500
500
5
25
45
65
1500
1200
900
600
300
Chp Rating – 1835 rpm
970 bkW (1300 bhp) 1318 mhp
Fuel Fuel Fuel Fuel
Speed Power Torque Cons Rate Power Torque Cons Rate
rpm bkW N•m g/bkW-hr L/hr bkW N•m g/bkW-hr L/hr______ ________________________________ ___________________________________
1785 895 4788 203 216.8 895 4788 203 216.8
1600 645 3847 205 157.3 895 5342 197 209.7
1400 432 2945 214 110.1 808 5511 180 173.4
1200 272 2164 224 72.6 456 3629 198 107.5
1000 157 1503 232 43.5 210 2005 228 57.1
800 81 962 247 23.7 138 1647 237 39.0
700 54 736 253 16.3 113 1542 241 32.4
Fuel Fuel Fuel Fuel
Speed Power Torque Cons Rate Power Torque Cons Rate
rpm bhp lb-ft lb/bhp-hr g/hr bhp lb-ft lb/bhp-hr g/hr______ ________________________________ ___________________________________
1785 1200 3531 .334 57.3 1200 3531 .334 57.3
1600 864 2837 .337 41.6 1200 3940 .323 55.4
1400 579 2172 .352 29.1 1084 4065 .296 45.8
1200 365 1596 .368 19.2 612 2677 .325 28.4
1000 211 1109 .381 11.5 282 1479 .375 15.1
800 108 710 .406 6.3 185 1215 .390 10.3
700 72 543 .417 4.3 152 1137 .395 8.6
Prop Demand Curve Data Max Power Curve Data
Bhp – Fast commercial and passenger vessels, including hydrofoils, catamarans,
SES, and SWATH with high load factors (continuous service rating).
Engine Speed rpm
Torque
lb-ft
Power
bhp
Cons.Rate
g/hr
L/hrN•mbkW
700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000
1075
575
75
6000
750
280
150
20
33752500
3500
4500
1500
500
5
25
45
65
1500
1200
900
600
300
Bhp Rating – 1785 rpm
895 bkW (1200 bhp) 1217 mhp
TMI — DM1801-01
TMI — DM1799-01
Prop Demand 3.0 Exponent
• Engine Performance Parameters: Power +/- 3%;
Specific Fuel Consumption +/- 3%; Fuel Rate +/- 5%.
•

4. Materials and specifications are subject to change without notice. The International System of Units (SI) is used in this publication.
LEHM8177 Printed in U.S.A. © 1998 Caterpillar Inc.
Supersedes LEHM5345 All rights reserved.
3508B MARINE – HIGH PERFORMANCE VESSELS
3508B High Performance Propulsion Engine
Dimensions shown in millimeters
Rear View
2151.2
1793.6
335.0
1559.0
609.7
Right Side View
465.9
920.0
1872.8
PERFORMANCE DATA*
Turbocharged-Sea Water Aftercooled
DIMENSIONS
Rating Level Ehp Dhp Chp Bhp
Rated rpm 1925 1880 1835 1785
NOx (g/bhp-hr)* 6.34 6.25 6.20 6.14
* NOx per ISO8178 Part 4 Test Cycle E3.
RATING DEFINITIONS AND CONDITIONS
Ratings are based on SAE J1228 standard
conditions of 100 kPa (29.61 in Hg) and 25° C
(77° F). These ratings also apply at ISO3046/1,
ISO8665, DIN6271, and BS5514 standard
conditions of 100 kPa (29.61 in Hg), 27° C (81° F)
and 60% relative humidity. Ratings are valid for
air cleaner inlet temperatures up to and including
50° C (122° F) and for sea water temperatures up
to and including 42° C (108° F) at sea level.
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/liter (7.001 lbs/U.S. gal). Fuel
consumption shown with all oil, fuel, and water
pumps, engine driven. For a “without pumps”
condition, deduct approximately 0.5% for each
pump not engine driven.
Additional ratings may be available for specific
customer requirements. Consult your Caterpillar
representative for details.