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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.

  • Twin Disc MG5114 4.59 Marine Transmission

    Used Twin Disc MG5114 4.59 Marine Transmission
    Ready to Ship
    Condition: Used
    Gear Ratio: 4.59
    Depco Item # 19402
  • Good Used Twin Disc MG514A 6 Marine Transmission

    Good Used Twin Disc MG514A 6 Marine Transmission
    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 18213
    Price: $14,500
    Sale Price: $7,900 (46% off!)
  • Good Used Twin Disc MG514A 6 Marine Transmission

    Good Used Twin Disc MG514A 6 Marine Transmission
    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 18214
    Price: $14,500
    Sale Price: $7,900 (46% off!)
  • Good Used Twin Disc MG514B 4.5 Marine Transmission

    Good Used Twin Disc MG514B 4.5 Marine Transmission
    Condition: Good Used
    Gear Ratio: 4.5
    Depco Item # 16881
  • Good Used Twin Disc MG514B 6 Marine Transmission

    Good Used Twin Disc MG514B 6 Marine Transmission
    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 18263
  • Good Used Twin Disc MG514B 6 Marine Transmission

    Good Used Twin Disc MG514B 6 Marine Transmission
    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 18264
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  • Good Used Twin Disc MG514C 5.16 Marine Transmission

    Good Used Twin Disc MG514C 5.16 Marine Transmission
    Condition: Good Used
    Gear Ratio: 5.16
    Depco Item # 16799
  • Good Used Twin Disc MG514C 4.13 Marine Transmission

    Good Used Twin Disc MG514C 5.16 Marine Transmission
    Condition: Good Used
    Gear Ratio: 5.16
    Depco Item # 17329
  • Placeholder

    Reconditioned Twin Disc MG514C 5.16 Marine Transmission
    Condition: Reconditioned
    Gear Ratio: 5.16
    Depco Item # 19215
  • Placeholder

    Reconditioned Twin Disc MG514C 5.16 Marine Transmission
    Condition: Reconditioned
    Gear Ratio: 5.16
    Depco Item # 19214
  • Good Used Twin Disc MG521 4.09 Marine Transmission

    Good Used Twin Disc MG521 4.09 Marine Transmission
    Condition: Good Used
    Gear Ratio: 4.09
    Depco Item # 17113
  • Good Used Twin Disc MG530 4.94 Marine Transmission

    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

    Rebuilt Twin Disc MG540 7 Marine Transmission
    Condition: Rebuilt
    Gear Ratio: 7
    Depco Item # 17007