PowerTech 6.8 L Engine
ENGINE PERFORMANCE CURVE
Rating:
Model: 6068SFM50
M1 - 182 hp (136 kW) @ 2200 rpm
[See Option Code Table]
(Propeller Shaft Power Based on
97% Marine Gear Efficiency)
Application: Marine
800
(542)
640
(868)
M1
612 lb-ft
(830 N•m)
480
(651)
320
(434)
Torque -- lb-ft (N•m)
Crankshaft Torque
Air Intake Restriction ...................12 in.H2O (3 kPa)
Exhaust Back Pressure ........... 30 in.H2O (7.5 kPa)
All values are from currently available data and are subject
to change without notice.
Crankshaft Power
240
(179)
M1
Notes:
160
(119)
Propeller Power
80
(60)
16
(61)
Crankshaft Fuel
M1
8
(30)
Propeller Fuel
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
Engine Speed -- rpm
Engine Performance Curves
6068 - Marine
Fuel -- gal/hr (liters/hr)
Power -- hp (kW)
320
(239)
Gross power guaranteed within + or - 5% at SAE J1995
and ISO 8665 conditions:
77 °F (25 °C) air inlet temperature
29.31 in.Hg (99 kPa) barometer
104 °F (40 °C) fuel inlet temperature
0.853 fuel specific gravity @ 60 °F (15.5 °C)
Conversion factors:
Power: kW = hp x 0.746
Fuel: 1 gal = 7.1 lb, 1 L = 0.85 kg
Torque: N•m = lb-ft x 1.356
Tier-2 Emission Certifications:
Certified by:
• EPA Commercial Marine
(40 CFR Part 94)
• IMO Annex VI
Ref: Engine Emission Label
* Revised Data
Curve: 6068SFM50182M1............................... Sheet 1 of 2
April 2004
April 2004
Common Specifications:
General Data
Model .............................................................. 6068SFM50
Number of Cylinders ......................................................... 6
Bore and Stroke--in.(mm).............. 4.19 x 5.00 (106 x 127)
Displacement--in3 (L) ............................................414 (6.8)
Compression Ratio ................................................. 17.0 : 1
Valves per Cylinder -- Intake / Exhaust ........................ 1 / 1
Firing Order....................................................... 1-5-3-6-2-4
Combustion System .................................... Direct Injection
Engine Type ................................................ In-line, 4-Cycle
Aspiration ......................................................Turbocharged
Aftercooling System ............................................. Seawater
Physical Data
(Includes Engine, Flywheel Housing, Flywheel & Electrics)
Length--in.(mm) ................................................ 46.6 (1183)
Width--in.(mm) ....................................................28.4 (721)
Height (centerline to top)--in.(mm) ......................24.4 (619)
Height (centerline to bottom)--in.(mm) ................12.9 (327)
Weight, dry--lb (kg).............................................1399 (636)
Center of Gravity Location
From Rear Face of Block (X-axis)--in.(mm) ....16.9 (430)
Right of Crankshaft (Y-axis)--in.(mm)................. 2.0 (50)
Above Crankshaft (Z-axis)--in.(mm)..................8.9 (225)
Max. Allow. Static Bending Moment at Rear Face
of Flywhl Hsg w/5-G Load--lb-ft (N•m) .............600 (814)
Thrust Bearing Load Limit (Forward)--lb (N) ......900 (4003)
Maximum Installed Angle
Front Up--degrees....................................................... 15
Front Down--degrees .................................................... 0
Air System
Minimum Ventilation Area--in2 (m2).....................180 (0.12)
Maximum Allowable Air Temperature Rise
Ambient to Engine Inlet--°F (°C) ........................160 (71)
Engine Air Flow--ft3/min (m3/min) ....................... 403 (11.4)
Intake Manifold Pressure--psi (kPa)...................... 11 (76.5)
Maximum Air Intake Restriction
Dirty Air Cleaner--in. H2O (kPa)..........................25 (6.3)
Clean Air Cleaner--in. H2O (kPa)........................12 (3.0)
Engine Specification Data
Lubrication System
Oil Pressure @ Rated Speed--psi (kPa) ................ 55 (380)
Oil Pressure @ Low Idle--psi (kPa) ....................... 15 (105)
Cooling System
Minimum Coolant Fill Rate--gal/min (L/min) .............. 3 (11)
Thermostat Start to Open--°F (°C) ......................... 176 (80)
Thermostat Fully Open--°F (°C)............................. 201 (94)
Maximum Top Tank Temperature--°F (°C) ........... 212 (100)
Minimum Water-to-Boil Temperature--°F (°C)........ 201 (94)
Recommended Pressure Cap--psi (kPa) ................... 1 (10)
Engine Coolant Capacity--qt (L) .............................. 30 (28)
Electrical System
12 Volt 24 Volt
Recommended Battery Capacity
Cold Cranking Amps @ 32 °F (0 °C)--amp...800 ..... 570
Max. Starting Circuit Resistance--Ohms ......0.0012 .. 0.002
Starter Rolling Current @ 32 °F (0 °C)--amp ....920 ..... 600
Exhaust System
Exhaust Gas Flow--ft3/min (m3/min) ................... 872 (24.7)
Exhaust Temperature--°F (°C) ............................. 763 (406)
Maximum Back Pressure--in. H2O (kPa) ................ 30 (7.5)
Maximum Weight on Turbocharger--lb (kg) ............. 55 (25)
Rec’d Minimum Exhaust Outlet Diameter--in.(mm)
Dry ...................................................................... 3.5 (90)
Wet.................................................................... 4.0 (101)
Fuel System
Fuel Injection Pump ....................................... Bosch VP-44
Governor Type .....................................................Electronic
Governor Regulation--percent ......................................... 4
Total Fuel Flow--gal/hr (L/hr)............................... 41 (156.4)
Minimum Hose ID--in. (mm).................................... 0.27 (7)
Minimum Fuel Supply and Return Hose Size .................. -5
Fuel Consumption--gal/hr (L/hr)........................... 9.6 (36.4)
Maximum Leak Off Line Pressure--psi (kPa) ............. 2 (14)
Max. Fuel Transfer Pump Suction Lift--ft (m) fuel ..... 3 (0.9)
Max. Fuel Inlet Pressure--psi (kPa) ........................... 4 (30)
Max. Fuel Height Above Transfer Pump--ft (m) ..... 4.6 (1.4)
Max. Fuel Inlet Temperature--°F (°C) .................... 167 (75)
Fuel Filter Size @ 98% Efficiency--Micron ....................... 5
Sea Water System
Sea Water Pump Flow--gal/min (L/min)................. 52 (196)
Maximum Inlet Restriction---in. H2O (kPa) ............ 120 (30)
Maximum Outlet Pressure--psi (kPa)..................... 24 (165)
Maximum Suction Lift--ft (m)...................................... 10 (3)
Performance Data
Performance Option Codes ........................... 72GH / 72GJ
Rated Power--hp (kW) ......................................... 182 (136)
Rated Power (Metric), Fuel @ 77 °F (25 °C)--PS ......... 185
Rated Speed--rpm ...................................................... 2200
Rated Torque--lb-ft (N•m)..................................... 435 (590)
Peak Torque--lb-ft (N•m) ...................................... 612 (830)
Peak Torque Speed--rpm............................................ 1500
Torque Rise--percent ................................................... 40.6
Low Idle Speed--rpm .................................................... 650
BMEP--psi (kPa) ................................................ 158 (1091)
Fuel Consumption for Typical Propeller Curve
Engine
rpm
2200
2100
2000
1800
1700
1600
1500
1400
1200
1000
Crank
Power
hp (kW)
Crank
Torque
lb-ft (N•m)
Prop
Power
hp (kW)
Prop
Fuel
gal/hr(L/hr)
182 (136)
182 (136)
182 (136)
182 (136)
182 (136)
182 (136)
175 (130)
158 (118)
106 (79)
79 (59)
435 (590)
457 (620)
479 (650)
534 (724)
563 (764)
596 (808)
612 (830)
592 (802)
465 (630)
415 (562)
177 (132)
154 (115)
133 (99)
97 (72)
82 (61)
68 (51)
56 (42)
46 (34)
29 (21)
17 (12)
9.6 (36.4)
8.3 (31.4)
7.0 (26.5)
5.1 (19.2)
4.3 (16.4)
3.6 (13.6)
3.0 (11.3)
2.5 (9.4)
1.6 (6.1)
1.1 (4.0)
Data based on keel-cooled engine.
All values at rated speed and power with standard options unless otherwise noted.
* Revised Data
Curve: 6068SFM50182M1 .............................. Sheet 2 of 2
April 2004
Engine Performance Curves
6068 - Marine
April 2004
PowerTech 6.8 L Engine
ENGINE PERFORMANCE CURVE
Rating:
Model: 6068SFM50
M2 - 208 hp (155 kW) @ 2300 rpm
[See Option Code Table]
(Propeller Shaft Power Based on
97% Marine Gear Efficiency)
Application: Marine
800
(542)
640
(868)
M2
629 lb-ft
(853 N•m)
480
(651)
320
(434)
Torque -- lb-ft (N•m)
Crankshaft Torque
Air Intake Restriction ...................12 in.H2O (3 kPa)
Exhaust Back Pressure ........... 30 in.H2O (7.5 kPa)
All values are from currently available data and are subject
to change without notice.
Crankshaft Power
240
(179)
M2
Notes:
160
(119)
Propeller Power
80
(60)
Crankshaft Fuel
16
(61)
M2
8
(30)
Propeller Fuel
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
Engine Speed -- rpm
Engine Performance Curves
6068 - Marine
Fuel -- gal/hr (liters/hr)
Power -- hp (kW)
320
(239)
Gross power guaranteed within + or - 5% at SAE J1995
and ISO 8665 conditions:
77 °F (25 °C) air inlet temperature
29.31 in.Hg (99 kPa) barometer
104 °F (40 °C) fuel inlet temperature
0.853 fuel specific gravity @ 60 °F (15.5 °C)
Conversion factors:
Power: kW = hp x 0.746
Fuel: 1 gal = 7.1 lb, 1 L = 0.85 kg
Torque: N•m = lb-ft x 1.356
Tier-2 Emission Certifications:
Certified by:
• EPA Commercial Marine
(40 CFR Part 94)
• IMO Annex VI
Ref: Engine Emission Label
* Revised Data
Curve: 6068SFM50208M2............................... Sheet 1 of 2
April 2004
April 2004
Common Specifications:
General Data
Model .............................................................. 6068SFM50
Number of Cylinders ......................................................... 6
Bore and Stroke--in.(mm).............. 4.19 x 5.00 (106 x 127)
Displacement--in3 (L) ............................................414 (6.8)
Compression Ratio ................................................. 17.0 : 1
Valves per Cylinder -- Intake / Exhaust ........................ 1 / 1
Firing Order....................................................... 1-5-3-6-2-4
Combustion System .................................... Direct Injection
Engine Type ................................................ In-line, 4-Cycle
Aspiration ......................................................Turbocharged
Aftercooling System ............................................. Seawater
Physical Data
(Includes Engine, Flywheel Housing, Flywheel & Electrics)
Length--in.(mm) ................................................ 46.6 (1183)
Width--in.(mm) ....................................................28.4 (721)
Height--in.(mm) ...................................................36.5 (926)
Height (centerline to top)--in.(mm) ......................24.4 (619)
Height (centerline to bottom)--in.(mm) ................12.9 (327)
Center of Gravity Location
From Rear Face of Block (X-axis)--in.(mm) ....16.9 (430)
Right of Crankshaft (Y-axis)--in.(mm)................. 2.0 (50)
Above Crankshaft (Z-axis)--in.(mm)..................8.9 (225)
Max. Allow. Static Bending Moment at Rear Face
of Flywhl Hsg w/5-G Load--lb-ft (N•m) .............600 (814)
Thrust Bearing Load Limit (Forward)--lb (N) ......900 (4003)
Maximum Installed Angle
Front Up--degrees....................................................... 15
Front Down--degrees .................................................... 0
Air System
Minimum Ventilation Area--in2 (m2).....................180 (0.12)
Maximum Allowable Air Temperature Rise
Ambient to Engine Inlet--°F (°C) ........................160 (71)
Engine Air Flow--ft3/min (m3/min) .......................448 (12.7)
Intake Manifold Pressure--psi (kPa)......................13 (91.6)
Maximum Air Intake Restriction
Dirty Air Cleaner--in. H2O (kPa)..........................25 (6.3)
Clean Air Cleaner--in. H2O (kPa)........................12 (3.0)
Engine Specification Data
Lubrication System
Oil Pressure @ Rated Speed--psi (kPa) ................ 56 (385)
Oil Pressure @ Low Idle--psi (kPa) ....................... 15 (105)
Cooling System
Minimum Coolant Fill Rate--gal/min (L/min) .............. 3 (11)
Thermostat Start to Open--°F (°C) ......................... 176 (80)
Thermostat Fully Open--°F (°C)............................. 201 (94)
Maximum Top Tank Temperature--°F (°C) ........... 212 (100)
Minimum Water-to-Boil Temperature--°F (°C)........ 201 (94)
Recommended Pressure Cap--psi (kPa) ................... 1 (10)
Engine Coolant Capacity--qt (L) .............................. 30 (28)
Electrical System
Sea Water System
Sea Water Pump Flow--gal/min (L/min)................. 54 (205)
Maximum Inlet Restriction---in. H2O (kPa) ............ 120 (30)
Maximum Outlet Pressure--psi (kPa)..................... 24 (165)
Maximum Suction Lift--ft (m)...................................... 10 (3)
Performance Data
12 Volt 24 Volt
Recommended Battery Capacity
Cold Cranking Amps @ 32 °F (0 °C)--amp...800 ..... 570
Max. Starting Circuit Resistance--Ohms ......0.0012 .. 0.002
Starter Rolling Current @ 32 °F (0 °C)--amp ....920 ..... 600
Exhaust System
Exhaust Gas Flow--ft3/min (m3/min) ................... 958 (27.1)
Exhaust Temperature--°F (°C) ............................. 725 (385)
Maximum Back Pressure--in. H2O (kPa) ................ 30 (7.5)
Maximum Weight on Turbocharger--lb (kg) ............. 55 (25)
Rec’d Minimum Exhaust Outlet Diameter--in.(mm)
Dry ...................................................................... 3.5 (90)
Wet.................................................................... 4.0 (101)
Fuel System
Fuel Injection Pump ....................................... Bosch VP-44
Governor Type .....................................................Electronic
Governor Regulation--percent ......................................... 4
Total Fuel Flow--gal/hr (L/hr)............................... 42 (160.1)
Minimum Hose ID--in. (mm).................................... 0.27 (7)
Minimum Fuel Supply and Return Hose Size .................. -5
Fuel Consumption--gal/hr (L/hr)......................... 10.6 (40.1)
Maximum Leak Off Line Pressure--psi (kPa) ............. 2 (14)
Max. Fuel Transfer Pump Suction Lift--ft (m) fuel ..... 3 (0.9)
Max. Fuel Inlet Pressure--psi (kPa) ........................... 4 (30)
Max. Fuel Height Above Transfer Pump--ft (m) ..... 4.6 (1.4)
Max. Fuel Inlet Temperature--°F (°C) .................... 167 (75)
Fuel Filter Size @ 98% Efficiency--Micron ....................... 5
Performance Option Codes ...........................72GB / 72GC
Rated Power--hp (kW) ......................................... 208 (155)
Rated Power (Metric), Fuel @ 77 °F (25 °C)--PS ..........211
Rated Speed--rpm ...................................................... 2300
Rated Torque--lb-ft (N•m)..................................... 475 (644)
Peak Torque--lb-ft (N•m) ...................................... 629 (853)
Peak Torque Speed--rpm............................................ 1600
Torque Rise--percent ................................................... 32.5
Low Idle Speed--rpm .................................................... 650
BMEP--psi (kPa) ................................................ 172 (1189)
Fuel Consumption for Typical Propeller Curve
Engine
rpm
2300
2200
2100
2000
1900
1800
1700
1600
1400
1200
1000
Crank
Power
hp (kW)
Crank
Torque
lb-ft (N•m)
Prop
Power
hp (kW)
Prop
Fuel
gal/hr(L/hr)
208 (155)
208 (155)
208 (155)
208 (155)
208 (155)
206 (154)
202 (151)
192 (143)
158 (118)
106 (79)
79 (59)
475 (644)
496 (673)
520 (705)
546 (740)
575 (779)
601 (815)
624 (846)
629 (853)
592 (802)
465 (630)
415 (562)
202 (150)
177 (132)
154 (115)
133 (99)
114 (85)
97 (72)
81 (61)
68 (51)
46 (34)
29 (21)
17 (12)
10.6 (40.1)
9.2 (34.9)
7.9 (29.9)
6.9 (26.2)
5.9 (22.4)
5.0 (18.8)
4.3 (16.2)
3.6 (13.5)
2.5 (9.4)
1.6 (6.2)
1.0 (3.9)
Data based on keel-cooled engine.
All values at rated speed and power with standard options unless otherwise noted.
* Revised Data
Curve: 6068SFM50208M2 .............................. Sheet 2 of 2
April 2004
Engine Performance Curves
6068 - Marine
April 2004
PowerTech 6.8 L Engine
ENGINE PERFORMANCE CURVE
Rating:
Model: 6068SFM50
M3 - 236 hp (176 kW) @ 2400 rpm
[See Option Code Table]
(Propeller Shaft Power Based on
97% Marine Gear Efficiency)
Application: Marine
800
(542)
640
(868)
674 lb-ft
(914 N•m)
M3
480
(651)
320
(434)
Gross power guaranteed within + or - 5% at SAE J1995
and ISO 8665 conditions:
77 °F (25 °C) air inlet temperature
29.31 in.Hg (99 kPa) barometer
104 °F (40 °C) fuel inlet temperature
0.853 fuel specific gravity @ 60 °F (15.5 °C)
Conversion factors:
Power: kW = hp x 0.746
Fuel: 1 gal = 7.1 lb, 1 L = 0.85 kg
Torque: N•m = lb-ft x 1.356
All values are from currently available data and are subject
to change without notice.
Crankshaft Power
M3
240
(179)
Notes:
160
(119)
Propeller Power
80
(60)
Crankshaft Fuel
16
(61)
M3
8
(30)
Propeller Fuel
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
Engine Speed -- rpm
Engine Performance Curves
6068 - Marine
Fuel -- gal/hr (liters/hr)
Power -- hp (kW)
320
(239)
Torque -- lb-ft (N•m)
Crankshaft Torque
Air Intake Restriction ...................12 in.H2O (3 kPa)
Exhaust Back Pressure ........... 30 in.H2O (7.5 kPa)
Tier-2 Emission Certifications:
Certified by:
• EPA Commercial Marine
(40 CFR Part 94)
• IMO Annex VI
Ref: Engine Emission Label
* Revised Data
Curve: 6068SFM50236M3............................... Sheet 1 of 2
April 2004
April 2004
Common Specifications:
General Data
Model .............................................................. 6068SFM50
Number of Cylinders ......................................................... 6
Bore and Stroke--in.(mm).............. 4.19 x 5.00 (106 x 127)
Displacement--in3 (L) ............................................414 (6.8)
Compression Ratio ................................................. 17.0 : 1
Valves per Cylinder -- Intake / Exhaust ........................ 1 / 1
Firing Order....................................................... 1-5-3-6-2-4
Combustion System .................................... Direct Injection
Engine Type ................................................ In-line, 4-Cycle
Aspiration ......................................................Turbocharged
Aftercooling System ............................................. Seawater
Physical Data
(Includes Engine, Flywheel Housing, Flywheel & Electrics)
Length--in.(mm) ................................................ 46.6 (1183)
Width--in.(mm) ....................................................28.4 (721)
Height (centerline to top)--in.(mm) ......................24.4 (619)
Height (centerline to bottom)--in.(mm) ................12.9 (327)
Weight, dry--lb (kg).............................................1399 (636)
Center of Gravity Location
From Rear Face of Block (X-axis)--in.(mm) ....16.9 (430)
Right of Crankshaft (Y-axis)--in.(mm)................. 2.0 (50)
Above Crankshaft (Z-axis)--in.(mm)..................8.9 (225)
Max. Allow. Static Bending Moment at Rear Face
of Flywhl Hsg w/5-G Load--lb-ft (N•m) .............600 (814)
Thrust Bearing Load Limit (Forward)--lb (N) ......900 (4003)
Maximum Installed Angle
Front Up--degrees....................................................... 15
Front Down--degrees .................................................... 0
Air System
Minimum Ventilation Area--in2 (m2).....................180 (0.12)
Maximum Allowable Air Temperature Rise
Ambient to Engine Inlet--°F (°C) ........................160 (71)
Engine Air Flow--ft3/min (m3/min) .......................516 (14.6)
Intake Manifold Pressure--psi (kPa).................... 17 (114.6)
Maximum Air Intake Restriction
Dirty Air Cleaner--in. H2O (kPa)..........................25 (6.3)
Clean Air Cleaner--in. H2O (kPa)........................12 (3.0)
Engine Specification Data
Lubrication System
Oil Pressure @ Rated Speed--psi (kPa) ................ 56 (385)
Oil Pressure @ Low Idle--psi (kPa) ....................... 15 (105)
Cooling System
Minimum Coolant Fill Rate--gal/min (L/min) .............. 3 (11)
Thermostat Start to Open--°F (°C) ......................... 176 (80)
Thermostat Fully Open--°F (°C)............................. 201 (94)
Maximum Top Tank Temperature--°F (°C) ........... 212 (100)
Minimum Water-to-Boil Temperature--°F (°C)........ 201 (94)
Recommended Pressure Cap--psi (kPa) ................... 1 (10)
Engine Coolant Capacity--qt (L) .............................. 30 (28)
Electrical System
Sea Water System
Sea Water Pump Flow--gal/min (L/min)................. 57 (214)
Maximum Inlet Restriction---in. H2O (kPa) ............ 120 (30)
Maximum Outlet Pressure--psi (kPa)..................... 24 (165)
Maximum Suction Lift--ft (m)...................................... 10 (3)
Performance Data
12 Volt 24 Volt
Recommended Battery Capacity
Cold Cranking Amps @ 32 °F (0 °C)--amp...800 ..... 570
Max. Starting Circuit Resistance--Ohms ......0.0012 .. 0.002
Starter Rolling Current @ 32 °F (0 °C)--amp ....920 ..... 600
Exhaust System
Exhaust Gas Flow--ft3/min (m3/min) ................. 1088 (30.8)
Exhaust Temperature--°F (°C) ............................. 711 (377)
Maximum Back Pressure--in. H2O (kPa) ................ 30 (7.5)
Maximum Weight on Turbocharger--lb (kg) ............. 55 (25)
Rec’d Minimum Exhaust Outlet Diameter--in.(mm)
Dry .................................................................... 4.5 (115)
Wet.................................................................... 5.0 (127)
Fuel System
Fuel Injection Pump ....................................... Bosch VP-44
Governor Type .....................................................Electronic
Governor Regulation--percent ......................................... 4
Total Fuel Flow--gal/hr (L/hr)............................... 44 (165.5)
Minimum Hose ID--in. (mm).................................... 0.27 (7)
Minimum Fuel Supply and Return Hose Size .................. -5
Fuel Consumption--gal/hr (L/hr)......................... 12.0 (45.5)
Maximum Leak Off Line Pressure--psi (kPa) ............. 2 (14)
Max. Fuel Transfer Pump Suction Lift--ft (m) fuel ..... 3 (0.9)
Max. Fuel Inlet Pressure--psi (kPa) ........................... 4 (30)
Max. Fuel Height Above Transfer Pump--ft (m) ..... 4.6 (1.4)
Max. Fuel Inlet Temperature--°F (°C) .................... 167 (75)
Fuel Filter Size @98% Efficiency--Micron ........................ 5
Performance Option Codes ............................72FZ / 72GA
Rated Power--hp (kW) ......................................... 236 (176)
Rated Power (Metric), Fuel @ 77 °F (25 °C)--PS ......... 239
Rated Speed--rpm ...................................................... 2400
Rated Torque--lb-ft (N•m)..................................... 517 (700)
Peak Torque--lb-ft (N•m) ...................................... 674 (914)
Peak Torque Speed--rpm............................................ 1600
Torque Rise--percent ................................................... 30.5
Low Idle Speed--rpm .................................................... 650
BMEP--psi (kPa) ................................................ 188 (1294)
Fuel Consumption for Typical Propeller Curve
Engine
rpm
2400
2300
2200
2100
2000
1900
1800
1600
1400
1200
1000
Crank
Power
hp (kW)
Crank
Torque
lb-ft (N•m)
Prop
Power
hp (kW)
Prop
Fuel
gal/hr(L/hr)
236 (176)
236 (176)
236 (176)
236 (176)
236 (176)
233 (174)
228 (170)
205 (153)
158 (118)
106 (79)
79 (59)
516 (700)
539 (731)
564 (765)
591 (801)
620 (841)
645 (875)
665 (902)
674 (914)
592 (802)
465 (630)
415 (562)
229 (171)
201 (150)
176 (131)
153 (114)
132 (99)
114 (85)
97 (72)
68 (51)
45 (34)
29 (21)
17 (12)
12.0 (45.5)
10.6 (40.0)
9.2 (34.7)
8.0 (30.2)
6.9 (26.1)
5.9 (22.4)
5.1 (19.4)
3.6 (13.6)
2.5 (9.4)
1.6 (6.1)
1.0 (3.9)
Data based on keel-cooled engine.
All values at rated speed and power with standard options unless otherwise noted.
* Revised Data
Curve: 6068SFM50236M3 .............................. Sheet 2 of 2
April 2004
Engine Performance Curves
6068 - Marine
April 2004
PowerTech 6.8 L Engine
ENGINE PERFORMANCE CURVE
Rating:
Model: 6068SFM50
M4 - 267 hp (199 kW) @ 2500 rpm
[See Option Code Table]
(Propeller Shaft Power Based on
97% Marine Gear Efficiency)
Application: Marine
800
(542)
640
(868)
719 lb-ft
(975 N•m)
M4
480
(651)
320
(434)
Crankshaft Power
Gross power guaranteed within + or - 5% at SAE J1995
and ISO 8665 conditions:
77 °F (25 °C) air inlet temperature
29.31 in.Hg (99 kPa) barometer
104 °F (40 °C) fuel inlet temperature
0.853 fuel specific gravity @ 60 °F (15.5 °C)
Conversion factors:
Power: kW = hp x 0.746
Fuel: 1 gal = 7.1 lb, 1 L = 0.85 kg
Torque: N•m = lb-ft x 1.356
All values are from currently available data and are subject
to change without notice.
M4
240
(179)
Notes:
160
(119)
Propeller Power
80
(60)
Crankshaft Fuel
16
(61)
M4
8
(30)
Propeller Fuel
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
Engine Speed -- rpm
Engine Performance Curves
6068 - Marine
Fuel -- gal/hr (liters/hr)
Power -- hp (kW)
320
(239)
Torque -- lb-ft (N•m)
Crankshaft Torque
Air Intake Restriction ...................12 in.H2O (3 kPa)
Exhaust Back Pressure ........... 30 in.H2O (7.5 kPa)
Tier-2 Emission Certifications:
Certified by:
• EPA Commercial Marine
(40 CFR Part 94)
• IMO Annex VI
Ref: Engine Emission Label
* Revised Data
Curve: 6068SFM50267M4............................... Sheet 1 of 2
April 2004
April 2004
Common Specifications:
General Data
Model .............................................................. 6068SFM50
Number of Cylinders ......................................................... 6
Bore and Stroke--in.(mm).............. 4.19 x 5.00 (106 x 127)
Displacement--in3 (L) ............................................414 (6.8)
Compression Ratio ................................................. 17.0 : 1
Valves per Cylinder -- Intake / Exhaust ........................ 1 / 1
Firing Order....................................................... 1-5-3-6-2-4
Combustion System .................................... Direct Injection
Engine Type ................................................ In-line, 4-Cycle
Aspiration ......................................................Turbocharged
Aftercooling System ............................................. Seawater
Physical Data
(Includes Engine, Flywheel Housing, Flywheel & Electrics)
Length--in.(mm) ................................................ 46.6 (1183)
Width--in.(mm) ....................................................28.4 (721)
Height (centerline to top)--in.(mm) ......................24.4 (619)
Height (centerline to bottom)--in.(mm) ................12.9 (327)
Weight, dry--lb (kg).............................................1399 (636)
Center of Gravity Location
From Rear Face of Block (X-axis)--in.(mm) ....16.9 (430)
Right of Crankshaft (Y-axis)--in.(mm)................. 2.0 (50)
Above Crankshaft (Z-axis)--in.(mm)..................8.9 (225)
Max. Allow. Static Bending Moment at Rear Face
of Flywhl Hsg w/5-G Load--lb-ft (N•m) .............600 (814)
Thrust Bearing Load Limit (Forward)--lb (N) ......900 (4003)
Maximum Installed Angle
Front Up--degrees....................................................... 15
Front Down--degrees .................................................... 0
Air System
Minimum Ventilation Area--in2 (m2).....................180 (0.12)
Maximum Allowable Air Temperature Rise
Ambient to Engine Inlet--°F (°C) ........................160 (71)
Engine Air Flow--ft3/min (m3/min) .......................591 (16.7)
Intake Manifold Pressure--psi (kPa)....................20 (136.8)
Maximum Air Intake Restriction
Dirty Air Cleaner--in. H2O (kPa)..........................25 (6.3)
Clean Air Cleaner--in. H2O (kPa)........................12 (3.0)
Engine Specification Data
Lubrication System
Oil Pressure @ Rated Speed--psi (kPa) ................ 56 (385)
Oil Pressure @ Low Idle--psi (kPa) ....................... 15 (105)
Cooling System
Minimum Coolant Fill Rate--gal/min (L/min) .............. 3 (11)
Thermostat Start to Open--°F (°C) ......................... 176 (80)
Thermostat Fully Open--°F (°C)............................. 201 (94)
Maximum Top Tank Temperature--°F (°C) ........... 212 (100)
Minimum Water-to-Boil Temperature--°F (°C)........ 201 (94)
Recommended Pressure Cap--psi (kPa) ................... 1 (10)
Engine Coolant Capacity--qt (L) .............................. 30 (28)
Electrical System
Sea Water System
Sea Water Pump Flow--gal/min (L/min)................. 59 (223)
Maximum Inlet Restriction---in. H2O (kPa) ............ 120 (30)
Maximum Outlet Pressure--psi (kPa)..................... 24 (165)
Maximum Suction Lift--ft (m)...................................... 10 (3)
Performance Data
12 Volt 24 Volt
Recommended Battery Capacity
Cold Cranking Amps @ 32 °F (0 °C)--amp...800 ..... 570
Max. Starting Circuit Resistance--Ohms ......0.0012 .. 0.002
Starter Rolling Current @ 32 °F (0 °C)--amp ....920 ..... 600
Exhaust System
Exhaust Gas Flow--ft3/min (m3/min) ................. 1240 (35.1)
Exhaust Temperature--°F (°C) ............................. 716 (380)
Maximum Back Pressure--in. H2O (kPa) ................ 30 (7.5)
Maximum Weight on Turbocharger--lb (kg) ............. 55 (25)
Rec’d Minimum Exhaust Outlet Diameter--in.(mm)
Dry .................................................................... 4.5 (115)
Wet.................................................................... 5.0 (127)
Fuel System
Fuel Injection Pump ....................................... Bosch VP-44
Governor Type .....................................................Electronic
Governor Regulation--percent ......................................... 4
Total Fuel Flow--gal/hr (L/hr)............................... 45 (171.6)
Minimum Hose ID--in. (mm).................................... 0.27 (7)
Minimum Fuel Supply and Return Hose Size .................. -5
Fuel Consumption--gal/hr (L/hr)......................... 13.6 (51.6)
Maximum Leak Off Line Pressure--psi (kPa) ............. 2 (14)
Max. Fuel Transfer Pump Suction Lift--ft (m) fuel ..... 3 (0.9)
Max. Fuel Inlet Pressure--psi (kPa) ........................... 4 (30)
Max. Fuel Height Above Transfer Pump--ft (m) ..... 4.6 (1.4)
Max. Fuel Inlet Temperature--°F (°C) .................... 167 (75)
Fuel Filter Size @98% Efficiency--Micron ........................ 5
Performance Option Codes ............................ 72FX / 72FY
Rated Power--hp (kW) ......................................... 267 (199)
Rated Power (Metric), Fuel @ 77 °F (25 °C)--PS ......... 271
Rated Speed--rpm ...................................................... 2500
Rated Torque--lb-ft (N•m)..................................... 561 (760)
Peak Torque--lb-ft (N•m) ...................................... 719 (975)
Peak Torque Speed--rpm............................................ 1800
Torque Rise--percent ................................................... 28.3
Low Idle Speed--rpm .................................................... 650
BMEP--psi (kPa) ................................................ 204 (1405)
Fuel Consumption for Typical Propeller Curve
Engine
rpm
2500
2400
2300
2200
2100
2000
1900
1800
1600
1400
1200
1000
Crank
Power
hp (kW)
Crank
Torque
lb-ft (N•m)
Prop
Power
hp (kW)
Prop
Fuel
gal/hr(L/hr)
267 (199)
267 (199)
267 (199)
267 (199)
267 (199)
267 (199)
264 (197)
246 (184)
203 (152)
157 (117)
106 (79)
79 (59)
561 (760)
584 (792)
609 (826)
637 (864)
667 (905)
693 (940)
713 (967)
719 (975)
667 (905)
591 (801)
463 (628)
413 (560)
259 (193)
229 (171)
202 (150)
176 (132)
153 (114)
133 (99)
114 (85)
97 (72)
68 (51)
45 (34)
29 (21)
17 (12)
13.6 (51.6)
12.0 (45.3)
10.4 (39.3)
9.0 (34.1)
7.9 (29.9)
6.7 (25.4)
5.9 (22.3)
5.0 (19.1)
3.5 (13.4)
2.5 (9.4)
1.6 (6.1)
1.0 (3.9)
Data based on keel-cooled engine.
All values at rated speed and power with standard options unless otherwise noted.
* Revised Data
Curve: 6068SFM50267M4 .............................. Sheet 2 of 2
April 2004
Engine Performance Curves
6068 - Marine
April 2004
PowerTech 6.8 L Engine
ENGINE PERFORMANCE CURVE
Rating:
Model: 6068SFM50
M5 - 300 hp (224 kW) @ 2600 rpm
[See Option Code Table]
(Propeller Shaft Power Based on
97% Marine Gear Efficiency)
Application: Marine
800
(542)
741 lb-ft
(1005 N•m)
M5
640
(868)
480
(651)
320
(434)
Crankshaft Power
M5
240
(179)
Gross power guaranteed within + or - 5% at SAE J1995
and ISO 8665 conditions:
77 °F (25 °C) air inlet temperature
29.31 in.Hg (99 kPa) barometer
104 °F (40 °C) fuel inlet temperature
0.853 fuel specific gravity @ 60 °F (15.5 °C)
Conversion factors:
Power: kW = hp x 0.746
Fuel: 1 gal = 7.1 lb, 1 L = 0.85 kg
Torque: N•m = lb-ft x 1.356
All values are from currently available data and are subject
to change without notice.
Notes:
160
(119)
Propeller Power
80
(60)
Crankshaft Fuel
16
(61)
M5
8
(30)
Propeller Fuel
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
Engine Speed -- rpm
Engine Performance Curves
6068 - Marine
Fuel -- gal/hr (liters/hr)
Power -- hp (kW)
320
(239)
Torque -- lb-ft (N•m)
Crankshaft Torque
Air Intake Restriction ...................12 in.H2O (3 kPa)
Exhaust Back Pressure ........... 30 in.H2O (7.5 kPa)
Tier-2 Emission Certifications:
Certified by:
• EPA Commercial Marine
(40 CFR Part 94)
• IMO Annex VI
Ref: Engine Emission Label
* Revised Data
Curve: 6068SFM50300M5............................... Sheet 1 of 2
April 2004
April 2004
Common Specifications:
General Data
Model .............................................................. 6068SFM50
Number of Cylinders ......................................................... 6
Bore and Stroke--in.(mm).............. 4.19 x 5.00 (106 x 127)
Displacement--in3 (L) ............................................414 (6.8)
Compression Ratio ................................................. 17.0 : 1
Valves per Cylinder -- Intake / Exhaust ........................ 1 / 1
Firing Order....................................................... 1-5-3-6-2-4
Combustion System .................................... Direct Injection
Engine Type ................................................ In-line, 4-Cycle
Aspiration ......................................................Turbocharged
Aftercooling System ............................................. Seawater
Physical Data
(Includes Engine, Flywheel Housing, Flywheel & Electrics)
Length--in.(mm) ................................................ 46.6 (1183)
Width--in.(mm) ....................................................28.4 (721)
Height (centerline to top)--in.(mm) ......................24.4 (619)
Height (centerline to bottom)--in.(mm) ................12.9 (327)
Weight, dry--lb (kg).............................................1399 (636)
Center of Gravity Location
From Rear Face of Block (X-axis)--in.(mm) ....16.9 (430)
Right of Crankshaft (Y-axis)--in.(mm)................. 2.0 (50)
Above Crankshaft (Z-axis)--in.(mm)..................8.9 (225)
Max. Allow. Static Bending Moment at Rear Face
of Flywhl Hsg w/5-G Load--lb-ft (N•m) .............600 (814)
Thrust Bearing Load Limit (Forward)--lb (N) ......900 (4003)
Maximum Installed Angle
Front Up--degrees....................................................... 15
Front Down--degrees .................................................... 0
Air System
Minimum Ventilation Area--in2 (m2).....................180 (0.12)
Maximum Allowable Air Temperature Rise
Ambient to Engine Inlet--°F (°C) ........................160 (71)
Engine Air Flow--ft3/min (m3/min) .......................667 (18.9)
Intake Manifold Pressure--psi (kPa).......................24 (163)
Maximum Air Intake Restriction
Dirty Air Cleaner--in. H2O (kPa)..........................25 (6.3)
Clean Air Cleaner--in. H2O (kPa)........................12 (3.0)
Engine Specification Data
Lubrication System
Cooling System
Oil Pressure @ Rated Speed--psi (kPa) ................ 56 (385)
Oil Pressure @ Low Idle--psi (kPa) ....................... 15 (105)
Minimum Coolant Fill Rate--gal/min (L/min) .............. 3 (11)
Thermostat Start to Open--°F (°C) ......................... 176 (80)
Thermostat Fully Open--°F (°C)............................. 201 (94)
Maximum Top Tank Temperature--°F (°C) ........... 212 (100)
Minimum Water-to-Boil Temperature--°F (°C)........ 201 (94)
Recommended Pressure Cap--psi (kPa) ................... 1 (10)
Engine Coolant Capacity--qt (L) .............................. 30 (28)
Sea Water Pump Flow--gal/min (L/min)................. 61 (232)
Maximum Inlet Restriction---in. H2O (kPa) ............ 120 (30)
Maximum Outlet Pressure--psi (kPa)..................... 24 (165)
Maximum Suction Lift--ft (m)...................................... 10 (3)
Electrical System
Performance Data
12 Volt 24 Volt
Recommended Battery Capacity
Cold Cranking Amps @ 32 °F (0 °C)--amp...800 ..... 570
Max. Starting Circuit Resistance--Ohms ......0.0012 .. 0.002
Starter Rolling Current @ 32 °F (0 °C)--amp ....920 ..... 600
Exhaust System
Exhaust Gas Flow--ft3/min (m3/min) ................. 1438 (40.7)
Exhaust Temperature--°F (°C) ............................. 741 (394)
Maximum Back Pressure--in. H2O (kPa) ................ 30 (7.5)
Maximum Weight on Turbocharger--lb (kg) ............. 55 (25)
Rec’d Minimum Exhaust Outlet Diameter--in.(mm)
Dry .................................................................... 4.5 (115)
Wet.................................................................... 5.0 (127)
Sea Water System
Performance Option Codes ........................... 72FV / 72FW
Rated Power--hp (kW) ......................................... 300 (224)
Rated Power (Metric), Fuel @ 77 °F (25 °C)--PS ......... 305
Rated Speed--rpm ...................................................... 2600
Rated Torque--lb-ft (N•m)..................................... 607 (823)
Peak Torque--lb-ft (N•m) .................................... 741 (1005)
Peak Torque Speed--rpm............................................ 2000
Torque Rise--percent ................................................... 22.2
Low Idle Speed--rpm .................................................... 650
BMEP--psi (kPa) ................................................ 221 (1520)
Fuel Consumption for Typical Propeller Curve
Fuel System
Fuel Injection Pump .........................................Bosch VP44
Governor Type .....................................................Electronic
Governor Regulation--percent ......................................... 4
Total Fuel Flow--gal/hr (L/hr)............................... 47 (179.1)
Minimum Hose ID--in. (mm).................................... 0.27 (7)
Minimum Fuel Supply and Return Hose Size .................. -5
Fuel Consumption--gal/hr (L/hr)......................... 15.6 (59.1)
Maximum Leak Off Line Pressure--psi (kPa) ............. 2 (14)
Max. Fuel Transfer Pump Suction Lift--ft (m) fuel ..... 3 (0.9)
Max. Fuel Inlet Pressure--psi (kPa) ........................... 4 (30)
Max. Fuel Height Above Transfer Pump--ft (m) ..... 4.6 (1.4)
Max. Fuel Inlet Temperature--°F (°C) .................... 167 (75)
Fuel Filter Size @98% Efficiency--Micron ........................ 5
Engine
rpm
2600
2500
2400
2300
2200
2100
2000
1800
1600
1400
1200
1000
Crank
Power
hp (kW)
Crank
Torque
lb-ft (N•m)
Prop
Power
hp (kW)
Prop
Fuel
gal/hr(L/hr)
300 (224)
300 (224)
300 (224)
300 (224)
300 (224)
294 (219)
282 (210)
246 (184)
203 (152)
158 (118)
106 (79)
79 (59)
607 (823)
631 (855)
656 (890)
685 (929)
716 (971)
735 (996)
741 (1005)
719 (975)
667 (905)
592 (802)
465 (630)
415 (562)
291 (217)
259 (193)
229 (171)
202 (150)
177 (132)
154 (115)
133 (99)
97 (72)
68 (51)
46 (34)
29 (21)
17 (12)
15.6 (59.1)
13.3 (50.2)
11.6 (43.9)
10.1 (38.2)
8.7 (32.9)
7.7 (29.2)
6.7 (25.3)
5.0 (18.9)
3.5 (13.4)
2.5 (9.3)
1.6 (6.1)
1.0 (3.9)
Data based on keel-cooled engine.
All values at rated speed and power with standard options unless otherwise noted.
* Revised Data
Curve: 6068SFM50300M5 .............................. Sheet 2 of 2
April 2004
Engine Performance Curves
6068 - Marine
April 2004