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Lower Units & Gearcases

Lower Units & Gearcases

Lower Units & Gearcases

Shop genuine Mercury lower units, complete gearcase assemblies, and replacement gearcase components for a variety of Mercury outboard applications. Find OEM gearcases and related components designed for proper fitment and reliable performance.

Mercury gearcase fitment can vary by engine serial number, model, shaft length, gear ratio, rotation, and application. If you're not sure which lower unit you need, visit our Lower Unit & Gearcase Guide to learn more about fitment and replacement options.

Need help confirming fitment? Have your engine serial number ready and contact our team at (727) 596-5929.

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  • On Sale
    MERCURY OEM PINION ASSY-DRIVE, 13310T1 MERCURY OEM PINION ASSY-DRIVE, 13310T1
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    Mercury PINION ASSY-DRIVE OEM 13310T1

    Mercury

    MSRP: $69.49
    Now: $59.07
    Was: $69.49
    Genuine Mercury PINION ASSY-DRIVE, part number 13310T1. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 13310, 133101, 75661, 802639, 802639T.
    13310T1
    SKU:
    13310T1
    Availability:
    Usually Ships within 24hours
    Weight:
    4.26 Ounces
    MSRP: $69.49
    Now: $59.07
    Was: $69.49
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    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $69.49
    Now: $59.07
    Was: $69.49
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC FLUSH-500R, 8M0229501
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    Mercury Gear Case FLUSH-500R OEM 8M0229501

    Mercury

    MSRP: $62.45
    Now: $55.07
    Was: $62.45
    Genuine Mercury Gear Case FLUSH-500R, part number 8M0229501. Designed for use with compatible applications.
    8M0229501
    SKU:
    8M0229501
    Availability:
    Usually Ships within 24hours
    Weight:
    16.64 Ounces
    MSRP: $62.45
    Now: $55.07
    Was: $62.45
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $62.45
    Now: $55.07
    Was: $62.45
    Subtotal:
    Add to Cart
  • MERCURY OEM DRIVE CAP ASSY, M899808T
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    Mercury DRIVE CAP ASSY OEM M899808T

    Mercury

    MSRP: $40.99
    $34.84
    Genuine Mercury DRIVE CAP ASSY, part number M899808T. Designed for use with compatible applications.
    M899808T
    SKU:
    M899808T
    Availability:
    Usually Ships within 24hours
    Weight:
    13.12 Ounces
    MSRP: $40.99
    $34.84
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $40.99
    $34.84
    Subtotal:
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  • On Sale
    MERCURY OEM GEARCASE SEAL KIT, 8M0135820
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    Mercury GEARCASE SEAL KIT OEM 8M0135820

    Mercury

    MSRP: $39.99
    Now: $33.99
    Was: $39.99
    Genuine Mercury GEARCASE SEAL KIT, part number 8M0135820. Designed for use with compatible applications.
    8M0135820
    SKU:
    8M0135820
    Availability:
    Usually Ships within 24hours
    Weight:
    1.60 Ounces
    MSRP: $39.99
    Now: $33.99
    Was: $39.99
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $39.99
    Now: $33.99
    Was: $39.99
    Subtotal:
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  • On Sale
    MERCURY OEM DRIVESHAFT ASSY, 809877A1
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    Mercury DRIVESHAFT ASSY OEM 809877A1

    Mercury

    MSRP: $39.99
    Now: $33.99
    Was: $39.99
    Genuine Mercury DRIVESHAFT ASSY, part number 809877A1. Designed for use with compatible applications.
    809877A1
    SKU:
    809877A1
    Availability:
    Usually Ships within 24hours
    Weight:
    0.26 Ounces
    MSRP: $39.99
    Now: $33.99
    Was: $39.99
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $39.99
    Now: $33.99
    Was: $39.99
    Subtotal:
    Add to Cart
  • MERCURY OEM DRIVE CAP ASSY, M889261T
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    Mercury DRIVE CAP ASSY OEM M889261T

    Mercury

    MSRP: $30.99
    $26.34
    Genuine Mercury DRIVE CAP ASSY, part number M889261T. Designed for use with compatible applications.
    M889261T
    SKU:
    M889261T
    Availability:
    Usually Ships within 24hours
    Weight:
    16.00 Ounces
    MSRP: $30.99
    $26.34
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $30.99
    $26.34
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM SEAL-GEARCASE CVR, 8M0177437
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    Mercury SEAL-GEARCASE CVR OEM 8M0177437

    Mercury

    MSRP: $20.69
    Now: $17.59
    Was: $20.69
    Genuine Mercury SEAL-GEARCASE CVR, part number 8M0177437. Designed for use with compatible applications.
    8M0177437
    SKU:
    8M0177437
    Availability:
    Usually Ships within 24hours
    Weight:
    0.05 Ounces
    MSRP: $20.69
    Now: $17.59
    Was: $20.69
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $20.69
    Now: $17.59
    Was: $20.69
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM DECAL GEARCASE, 8M0235174
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    Mercury DECAL GEARCASE OEM 8M0235174

    Mercury

    MSRP: $0.50
    Now: $0.43
    Was: $0.50
    Genuine Mercury DECAL GEARCASE, part number 8M0235174. Designed for use with compatible applications.
    8M0235174
    SKU:
    8M0235174
    Availability:
    Usually Ships within 24hours
    Weight:
    0.32 Ounces
    MSRP: $0.50
    Now: $0.43
    Was: $0.50
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $0.50
    Now: $0.43
    Was: $0.50
    Subtotal:
    Add to Cart
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