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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  • Good Used Other GUW 355/1293 3.5 Marine Transmission

    Condition: Good Used
    Gear Ratio: 3.5
    Depco Item # 14113
    Price: $10,900
    Sale Price: $1,900 (83% off!)
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  • New Surplus Twin Disc MG5065A 2.04 Marine Transmission

    Condition: New Surplus
    Gear Ratio: 2.04
    Depco Item # 16389
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  • Good Used Twin Disc MG514 4.5 Marine Transmission

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

    Condition: Good Used
    Gear Ratio: 4.5
    Depco Item # 16905
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  • Good Used Twin Disc MG514B 6 Marine Transmission

    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 16882
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  • Good Used Twin Disc MG514C 4.13 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.13
    Depco Item # 16251
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  • Good Used Twin Disc MG514C 5.16 Marine Transmission

    Condition: Good Used
    Gear Ratio: 5.16
    Depco Item # 16799
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  • Good Used Twin Disc MG514C 4.5 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.5
    Depco Item # 16902
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  • Good Used Twin Disc MG514C 4.5 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.5
    Depco Item # 16904
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  • Good Used Twin Disc MG516 6 Marine Transmission

    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 17008
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  • Good Used Twin Disc MG516 6 Marine Transmission

    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 17009
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  • Good Used Twin Disc MG516 5.05 Marine Transmission

    Condition: Good Used
    Gear Ratio: 5.05
    Depco Item # 16990
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  • Good Used Twin Disc MG516 6 Marine Transmission

    Condition: Good Used
    Gear Ratio: 6
    Depco Item # 16992
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  • Good Used Twin Disc MG516 5.05 Marine Transmission

    Condition: Good Used
    Gear Ratio: 5.05
    Depco Item # 16900
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  • Good Used Twin Disc MG5170 DC 5.95 Marine Transmission

    Condition: Good Used
    Gear Ratio: 5.95
    Depco Item # 16993
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  • Good Used Twin Disc MG518 2 Marine Transmission

    Condition: Good Used
    Gear Ratio: 2
    Depco Item # 09170
    Price: $13,900
    Sale Price: $3,900 (72% off!)
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  • Good Used Twin Disc MG518-1 4.48 Marine Transmission

    Condition: Good Used
    Gear Ratio: 4.48
    Depco Item # 15417
    Price: $19,900
    Sale Price: $10,900 (45% off!)
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  • Good Used Twin Disc MG521 4.09 Marine Transmission

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

    Condition: Good Used
    Gear Ratio: 4.09
    Depco Item # 17114
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  • Good Used Twin Disc MG527 5.17 Marine Transmission

    Condition: Good Used
    Gear Ratio: 5.17
    Depco Item # 16879
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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 7 Marine Transmission

    Condition: Good Used
    Gear Ratio: 7
    Depco Item # 17007
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  • New Surplus Twin Disc MG5506 5.44 Marine Transmission

    Condition: New Surplus
    Gear Ratio: 5.44
    Depco Item # 16880
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