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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 L6 Verado 1.75:1 Counter-Rotation X-Long Complete Gearcase (Silver) 8M0236233
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    Mercury L6 Verado 1.75:1 Counter-Rotation X-Long Complete Gearcase (Silver) 8M0236233

    Mercury

    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Mercury L6 Verado 1.75:1 Counter-Rotation X-Long Complete Gearcase 8M0236233 is a genuine Mercury OEM complete gearcase assembly for compatible L6 Verado outboards. This gearcase has a 1.75:1 gear...
    8M0236233
    SKU:
    8M0236233
    Availability:
    Usually Ships within 24hours
    Weight:
    1,296.00 Ounces
    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Subtotal:
    Add to Cart
  • On Sale
    Mercury L6 Verado 1.85:1 Counter-Rotation X-Long Complete Gearcase (Silver) 8M0228062
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    Mercury L6 Verado 1.85:1 Counter-Rotation X-Long Complete Gearcase (Silver) 8M0228062

    Mercury

    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Mercury L6 Verado 1.85:1 Counter-Rotation X-Long Complete Gearcase 8M0228062 is a genuine Mercury OEM complete gearcase assembly. This L6 Verado gearcase has a 1.85:1 gear ratio, counter rotation,...
    8M0228062
    SKU:
    8M0228062
    Availability:
    Usually Ships within 24hours
    Weight:
    0.00 Ounces
    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC CXXL SILV, 8M0235826
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    Mercury Gear Case CXXL SILV OEM 8M0235826

    Mercury

    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Genuine Mercury Gear Case CXXL SILV, part number 8M0235826. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0142315, 8M0228019.
    8M0235826
    SKU:
    8M0235826
    Availability:
    Usually Ships within 24hours
    Weight:
    0.00 Ounces
    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC V8 CL SILVER, 8M0228047
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    Mercury Gear Case V8 CL SILVER OEM 8M0228047

    Mercury

    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Genuine Mercury Gear Case V8 CL SILVER, part number 8M0228047. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0158488.
    8M0228047
    SKU:
    8M0228047
    Availability:
    Usually Ships within 24hours
    Weight:
    0.00 Ounces
    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Subtotal:
    Add to Cart
  • MERCURY OEM GC CXXL SILV, 8M0142315
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    Mercury Complete Gearcase Counter Rotation XX Long Silver 8M0142315

    Mercury

    MSRP: $9,821.45
    $8,348.23
    Mercury Complete Gearcase Counter Rotation XX Long Silver 8M0142315 is a genuine Mercury Marine OEM replacement lower unit for compatible Mercury marine applications.This complete gearcase is...
    8M0142315
    SKU:
    8M0142315
    Availability:
    Usually Ships within 24hours
    Weight:
    1,184.00 Ounces
    MSRP: $9,821.45
    $8,348.23
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,821.45
    $8,348.23
    Subtotal:
    Add to Cart
  • On Sale
    Mercury L6 Verado 1.85:1 Counter-Rotation XX-Long Complete Gearcase (Silver) 8M0117244
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    Mercury L6 Verado 1.85:1 Counter-Rotation XX-Long Complete Gearcase (Silver) 8M0117244

    Mercury

    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Mercury L6 Verado 1.85:1 Counter-Rotation XX-Long Complete Gearcase 8M0117244 is a genuine Mercury OEM complete gearcase assembly. This L6 Verado gearcase has a 1.85:1 gear ratio, counter rotation,...
    8M0117244
    SKU:
    8M0117244
    Availability:
    Usually Ships within 24hours
    Weight:
    1,248.00 Ounces
    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,821.45
    Now: $8,662.50
    Was: $9,821.45
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC DSI XL 1.75, 8M0236198
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    Mercury Gear Case DSI XL 1.75 OEM 8M0236198

    Mercury

    MSRP: $9,765.00
    Now: $8,612.10
    Was: $9,765.00
    Genuine Mercury Gear Case DSI XL 1.75, part number 8M0236198. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 840470A13, 840470T20, 842004T04, 842004T26,...
    8M0236198
    SKU:
    8M0236198
    Availability:
    Usually Ships within 24hours
    Weight:
    912.00 Ounces
    MSRP: $9,765.00
    Now: $8,612.10
    Was: $9,765.00
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,765.00
    Now: $8,612.10
    Was: $9,765.00
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC 1.75 XXL, 8M0236220
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    Mercury Gear Case 1.75 XXL OEM 8M0236220

    Mercury

    MSRP: $9,715.00
    Now: $8,568.00
    Was: $9,715.00
    Genuine Mercury Gear Case 1.75 XXL, part number 8M0236220. Designed for use with compatible applications.
    8M0236220
    SKU:
    8M0236220
    Availability:
    Usually Ships within 24hours
    Weight:
    0.00 Ounces
    MSRP: $9,715.00
    Now: $8,568.00
    Was: $9,715.00
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,715.00
    Now: $8,568.00
    Was: $9,715.00
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GEAR HOUSIBG-OBIV, 818877A20
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    Mercury GEAR HOUSIBG-OBIV OEM 818877A20

    Mercury

    MSRP: $9,653.71
    Now: $8,512.02
    Was: $9,653.71
    Genuine Mercury GEAR HOUSIBG-OBIV, part number 818877A20. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 7457A1, 818877A14, 818877A4, 818877A9.
    818877A20
    SKU:
    818877A20
    Availability:
    Usually Ships within 24hours
    Weight:
    448.00 Ounces
    MSRP: $9,653.71
    Now: $8,512.02
    Was: $9,653.71
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,653.71
    Now: $8,512.02
    Was: $9,653.71
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC-BRAVO 4S, 8M0174813
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    Mercury Gear Case-BRAVO 4S OEM 8M0174813

    Mercury

    MSRP: $9,634.29
    Now: $8,959.99
    Was: $9,634.29
    Genuine Mercury Gear Case-BRAVO 4S, part number 8M0174813. Designed for use with compatible applications.
    8M0174813
    SKU:
    8M0174813
    Availability:
    Usually Ships within 24hours
    Weight:
    1,248.00 Ounces
    MSRP: $9,634.29
    Now: $8,959.99
    Was: $9,634.29
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,634.29
    Now: $8,959.99
    Was: $9,634.29
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC XXL SILVER, 8M0235837
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    Mercury Gear Case XXL SILVER OEM 8M0235837

    Mercury

    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Genuine Mercury Gear Case XXL SILVER, part number 8M0235837. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0142326, 8M0228024.
    8M0235837
    SKU:
    8M0235837
    Availability:
    Usually Ships within 24hours
    Weight:
    0.00 Ounces
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC XL SILVER, 8M0235835
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    Mercury Gear Case XL SILVER OEM 8M0235835

    Mercury

    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Genuine Mercury Gear Case XL SILVER, part number 8M0235835. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0142324, 8M0228022.
    8M0235835
    SKU:
    8M0235835
    Availability:
    Usually Ships within 24hours
    Weight:
    1,216.00 Ounces
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC CXL SILVER, 8M0235836
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    Mercury Gear Case CXL SILVER OEM 8M0235836

    Mercury

    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Genuine Mercury Gear Case CXL SILVER, part number 8M0235836. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0142325, 8M0228023.
    8M0235836
    SKU:
    8M0235836
    Availability:
    Usually Ships within 24hours
    Weight:
    1,280.00 Ounces
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC CXXL SILVER, 8M0235838
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    Mercury Gear Case CXXL SILVER OEM 8M0235838

    Mercury

    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Genuine Mercury Gear Case CXXL SILVER, part number 8M0235838. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0142327, 8M0228025.
    8M0235838
    SKU:
    8M0235838
    Availability:
    Usually Ships within 24hours
    Weight:
    1,440.00 Ounces
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC CXXL BLK, 8M0235825
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    Mercury Gear Case CXXL BLK OEM 8M0235825

    Mercury

    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Genuine Mercury Gear Case CXXL BLK, part number 8M0235825. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0142314.
    8M0235825
    SKU:
    8M0235825
    Availability:
    Usually Ships within 24hours
    Weight:
    1,680.00 Ounces
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC XL SILV, 8M0235820
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    Quick view

    Mercury Gear Case XL SILV OEM 8M0235820

    Mercury

    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Genuine Mercury Gear Case XL SILV, part number 8M0235820. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0142309, 8M0228016.
    8M0235820
    SKU:
    8M0235820
    Availability:
    Usually Ships within 24hours
    Weight:
    1,280.00 Ounces
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC XXL SILV, 8M0235824
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    Mercury Gear Case XXL SILV OEM 8M0235824

    Mercury

    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Genuine Mercury Gear Case XXL SILV, part number 8M0235824. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0142313, 8M0228018.
    8M0235824
    SKU:
    8M0235824
    Availability:
    Usually Ships within 24hours
    Weight:
    0.00 Ounces
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Subtotal:
    Add to Cart
  • On Sale
    MERCURY OEM GC CXL BLK, 8M0235821
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    Quick view

    Mercury Gear Case CXL BLK OEM 8M0235821

    Mercury

    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Genuine Mercury Gear Case CXL BLK, part number 8M0235821. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0142310.
    8M0235821
    SKU:
    8M0235821
    Availability:
    Usually Ships within 24hours
    Weight:
    0.00 Ounces
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Subtotal:
    Add to Cart
  • On Sale
    Mercury Verado 1.85:1 Counter-Rotation X-Long Complete Gearcase 8M0236285
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    Mercury Verado 1.85:1 Counter-Rotation X-Long Complete Gearcase 8M0236285

    Mercury

    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Mercury Verado 1.85:1 Counter-Rotation X-Long Complete Gearcase 8M0236285 is a genuine Mercury OEM complete gearcase assembly. This Verado gearcase has a 1.85:1 gear ratio, counter rotation, and...
    8M0236285
    SKU:
    8M0236285
    Availability:
    Usually Ships within 24hours
    Weight:
    1,456.00 Ounces
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Subtotal:
    Add to Cart
  • On Sale
    Mercury Verado 1.85:1 Counter-Rotation XX-Long Complete Gearcase 8M0236287
    Add to Cart
    Quick view

    Mercury Verado 1.85:1 Counter-Rotation XX-Long Complete Gearcase 8M0236287

    Mercury

    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Mercury Verado 1.85:1 Counter-Rotation XX-Long Complete Gearcase 8M0236287 is a genuine Mercury OEM complete gearcase assembly. This Verado gearcase has a 1.85:1 gear ratio, counter rotation, XX-Long...
    8M0236287
    SKU:
    8M0236287
    Availability:
    Usually Ships within 24hours
    Weight:
    0.00 Ounces
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Add to Cart Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $9,350.00
    Now: $8,246.70
    Was: $9,350.00
    Subtotal:
    Add to Cart
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