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.

All units selected for special pricing include the Depco guarantee and 30-day warranty on used inventory. Units will be fully serviced and tested to factory specifications.Liquidations units are sold as-is. All sales are final. Please read the notes section in the item description for details.

  • Used Twin Disc MG5114 4.59 Marine Transmission

    Condition: Used
    Gear Ratio: 4.59
    Depco Item # 19402

  • Good Used Twin Disc MG514A 6 Marine Transmission

    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 18213

  • Good Used Twin Disc MG514A 6 Marine Transmission

    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 18214

  • Good Used Twin Disc MG514B 4.5 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.5
    Depco Item # 16881

  • Good Used Twin Disc MG514B 4.5 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.5
    Depco Item # 16905

  • Good Used Twin Disc MG514B 6 Marine Transmission

    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 18263

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  • Good Used Twin Disc MG514B 6 Marine Transmission

    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 18264

  • Good Used Twin Disc MG514C 4.13 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.13
    Depco Item # 16251

  • Good Used Twin Disc MG514C 5.16 Marine Transmission

    Condition: Good Used
    Gear Ratio: 5.16
    Depco Item # 16799

  • Good Used Twin Disc MG514C 5.16 Marine Transmission

    Condition: Good Used
    Gear Ratio: 5.16
    Depco Item # 17329

  • Good Used Twin Disc MG514C 4.5 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.5
    Depco Item # 17989

  • Good Used Twin Disc MG514C 6 Marine Transmission

    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 18266

  • Good Used Twin Disc MG514C 6 Marine Transmission

    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 18267

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    Reconditioned Twin Disc MG514C 5.16 Marine Transmission

    Condition: Reconditioned
    Gear Ratio: 5.16
    Depco Item # 19215

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    Reconditioned Twin Disc MG514C 5.16 Marine Transmission

    Condition: Reconditioned
    Gear Ratio: 5.16
    Depco Item # 19214

  • Good Used Twin Disc MG518 2 Marine Transmission

    Condition: Good Used
    Gear Ratio: 2
    Depco Item # 09170

  • Good Used Twin Disc MG530 4.94 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.94
    Depco Item # 15968

  • Rebuilt Twin Disc MG540 7 Marine Transmission

    Condition: Rebuilt
    Gear Ratio: 7
    Depco Item # 17007