Marine Transmissions

Depco offers new, used and rebuilt marine transmissions from the industry’s leading suppliers such as Caterpillar, Twin Disc and more. From diesel pleasure craft to a wide range of commercial workboat applications, we have the selection and industry expertise to find you the right gearbox, at the right price. Each marine transmission or gearbox undergoes the Depco 6-point certification process, which includes rigorous inspection, servicing, testing to ensure that they will perform under the toughest conditions and hold up over time. Feel free to browse our inventory, or give us a call at 800-723-3726, and we’ll help you find what you need.

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  • High Hour Caterpillar 7231 4.67 Marine Transmission

    Condition: High Hour
    Gear Ratio: 4.67
    Depco Item # 14772
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  • High Hour Caterpillar 7231 4.67 Marine Transmission

    Condition: High Hour
    Gear Ratio: 4.67
    Depco Item # 14747
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  • Good Used Caterpillar 7271 5.5 Marine Transmission

    Condition: Good Used
    Gear Ratio: 5.5
    Depco Item # 15922
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  • Good Used Other GUW 355/1293 3.5 Marine Transmission

    Condition: Good Used
    Gear Ratio: 3.5
    Depco Item # 14113
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  • Good Used Twin Disc MG509 3.83 Marine Transmission

    Condition: Good Used
    Gear Ratio: 3.83
    Depco Item # 15356
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  • Good Used Twin Disc MG509 4.5 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.5
    Depco Item # 15357
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  • Good Used Twin Disc MG509 4.5 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.5
    Depco Item # 15324
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  • Good Used Twin Disc MG509 4.5 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.5
    Depco Item # 15325
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  • Good Used Twin Disc MG509 4.5 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.5
    Depco Item # 15643
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  • Good Used Twin Disc MG5114 DC 4.86 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.86
    Depco Item # 15644
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  • Good Used Twin Disc MG516 4.52 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.52
    Depco Item # 15967
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  • Rebuilt Twin Disc MG516 4.52 Marine Transmission

    Condition: Rebuilt
    Gear Ratio: 4.52
    Depco Item # 15362
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  • Good Used Twin Disc MG516 4.52 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.52
    Depco Item # 15292
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  • Good Used Twin Disc MG516 4.04 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.04
    Depco Item # 14197
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  • Good Used Twin Disc MG518 4.06 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.06
    Depco Item # 15840
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  • Good Used Twin Disc MG518 5.07 Marine Transmission

    Condition: Good Used
    Gear Ratio: 5.07
    Depco Item # 15852
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  • Good Used Twin Disc MG518 2 Marine Transmission

    Condition: Good Used
    Gear Ratio: 2
    Depco Item # 09170
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  • Good Used Twin Disc MG520-1 4.03 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.03
    Depco Item # 15407
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  • Good Used Twin Disc MG5202 DC 4.59 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.59
    Depco Item # 15418
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  • New Surplus Twin Disc MG5202 SC 2.03 Marine Transmission

    Condition: New Surplus
    Gear Ratio: 2.03
    Depco Item # 14068
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  • Good Used Twin Disc MG521 4.09 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.09
    Depco Item # 15844
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  • Good Used Twin Disc MG5222 4.03 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.03
    Depco Item # 15858
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  • Good Used Twin Disc MG5222 4.03 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.03
    Depco Item # 15857
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  • Good Used Twin Disc MG530 4.94 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.94
    Depco Item # 15968
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  • Good Used Twin Disc MG540 6.18 Marine Transmission

    Condition: Good Used
    Gear Ratio: 6.18
    Depco Item # 15848
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  • Good Used Twin Disc MG540 6.18 Marine Transmission

    Condition: Good Used
    Gear Ratio: 6.18
    Depco Item # 15849
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  • New Surplus ZF ZF W650 4.06 Marine Transmission

    Condition: New Surplus
    Gear Ratio: 4.06
    Depco Item # 14317
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