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Mitsubishi Heavy Duty Marine Propulsion Engines are designed for marine applications. Unique engine design features include individual heads, inspection ports, and heavier blocks. Mitsubishi has also been able to meet current engine emission regulations while still offering a proven mechanical governor control system.

Marine Propulsion Engines

ModelEPA TierDisplace-
ment
Heavy_DutyMedium/
Continuous Duty
BrochureSpec Sheet
S6B3-Y2MPTK 214.6 LHP: 429
kWm: 320
RPM: 2000
HP: 469
kWm: 320
RPM: 2065
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S6B3-Y3MPTAW314.6 LHP: 429
kWm: 320
RPM: 1940
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S6A3-Y1MPTA 118.56 LHP: 483 hp
kWm: 360
RPM: 1840
HP: 529
kWm: 395
RPM: 1900
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S6A3-Y1MPTK118.56 LHP: 543
kWm: 405
RPM: 1840
HP: 597
kWm: 445
RPM: 1900
S6A3-Y2MPTK218.56 LHP: 483
kWm: 360
RPM: 1840
HP: 529
kWm: 395
RPM: 1900
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S6A3-Y3MPTK318.56 LHP: 543
kWm: 405
RPM: 1840
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S6R-Y1MPTA124.51 LHP: 590
kWm: 440
RPM: 1600
HP: 650
kWm: 485
RPM: 1650
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S6R-Y1MPTK124.51 LHP: 630
kWm: 470
RPM: 1600
HP: 697
kWm: 520
RPM: 1650
S6R-Y2MPTK224.51 LHP: 630
kWm: 470
RPM: 1600
HP: 697
kWm: 520
RPM: 1650
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S6R-Y3MPTAW324.51 LHP: 630
kWm: 470
RPM: 1600
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S6R2-Y1MPTA129.96 LHP: 597
kWm: 445
RPM: 1350
HP: 657
kWm: 490
RPM: 1400
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S6R2-Y1MPTK129.96 LHP: 643
kWm: 480
RPM: 1350
HP: 710
kWm: 530
RPM: 1400
S6R2-Y3MPTAW329.96 LHP: 803
kWm: 599
RPM: 1400
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S12A2-Y1MPTA133.93 LHP: 850
kWm: 634
RPM: 1940
HP: 940
kWm: 701
RPM: 2000
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S12A2-Y1MPTK 233.93 LHP: 940
kWm: 701
RPM: 1940
HP: 1040
kWm: 776
RPM: 2000
S12A2-Y2MPTK233.93 LHP: 940
kWm: 701
RPM: 1940
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S12R-Y1MPTA149.03 LHP: 1180
kWm: 880
RPM: 1600
HP: 1300
kWm: 970
RPM:1650
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S12R-Y1MPTK149.03 LHP: 1260
kWm: 940
RPM: 1600
HP: 1394
kWm: 1040
RPM:1650
S12R-Y3MPTW-4349.03 LHP: 1100
kWm: 820
RPM: 1600
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S12R-Y3MPTAW-3349.03 LHP: 1260
kWm: 940
RPM: 1600
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S12R-Y2MPTK249.03 LHP: 1260
kWm: 940
RPM: 1600
HP: 1394
kWm: 1040
RPM: 1650
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S16R-Y1MPTA165.37 LHP: 1568
kWm: 1170
RPM: 1600
HP: 1729
kWm: 1290
RPM: 1650
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S16R-Y1MPTK165.37 LHP: 1676
kWm: 1250
RPM: 1600
HP: 1850
kWm: 1380
RPM: 1650
S16R-Y3MPTAW365.37 LHP: 1676
kWm: 1250
RPM: 1600
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Marine Generator Drive Engines

ModelEPA TierDisplacementGenerator DriveSpecs
S6A3-Y1MPTA 1 18.56 LHP: 617 hp
kWm: 460
RPM: 1800
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S6A3-Y1MPTK118.56 LHP: 637
kWm: 475
RPM: 1800
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S6R-Y1MPTA1 24.51 LHP: 798
kWm: 595
RPM: 1800
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S6R-Y1MPTK124.51 LHP: 852
kWm: 635
RPM: 1800
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S6R2-Y1MPTA1 29.96 LHP: 798
kWm: 595
RPM: 1500
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S6R2-Y1MPTK1 29.96 LHP: 858
kWm: 640
RPM: 1500
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S12A2-Y1MPTA1 33.93 LHP: 1020
kWm: 761
RPM: 1800
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S12A2-Y1MPTK133.93 LHP: 1110
kWm: 828
RPM: 1800
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S12R-Y1MPTA1 49.03 LHP: 1595
kWm: 1190
RPM: 1800
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S12R-Y1MPTK1 49.03 LHP: 1702
kWm: 1270
RPM: 1800
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S16R-Y1MPTA165.37 LHP: 2131
kWm: 1590
RPM: 1800
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S16R-Y1MPTK165.37 LHP: 2265
kWm: 1690
RPM: 1800
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