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.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
On Sale
Mercury Gear Case DSI 2.08 L OEM 8M0138384
Mercury
MSRP: $7,410.00Now: $6,533.10Was: $7,410.00Genuine Mercury Gear Case DSI 2.08 L, part number 8M0138384. Designed for use with compatible applications.8M0138384- SKU:
- 8M0138384
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,008.00 Ounces
MSRP: $7,410.00Now: $6,533.10Was: $7,410.00 -
On Sale
Mercury Gear Case BRAVO III XR OEM 8M0046831
Mercury
MSRP: $7,368.57Now: $6,852.99Was: $7,368.57Genuine Mercury Gear Case BRAVO III XR, part number 8M0046831. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8866G06.8M0046831- SKU:
- 8M0046831
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,328.00 Ounces
MSRP: $7,368.57Now: $6,852.99Was: $7,368.57 -
On Sale
Mercury Gear Case BR I XR/XZ DWP OEM 8866A62
Mercury
MSRP: $7,368.57Now: $6,852.99Was: $7,368.57Genuine Mercury Gear Case BR I XR/XZ DWP, part number 8866A62. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8866A60.8866A62- SKU:
- 8866A62
- Availability:
- Usually Ships within 24hours
- Weight:
- 908.00 Ounces
MSRP: $7,368.57Now: $6,852.99Was: $7,368.57 -
On Sale
Mercury MerCruiser Bravo I XR 1.35:1 Dual Water Pick-Up Complete Gearcase 8866A83
Mercury
MSRP: $7,368.57Now: $6,852.99Was: $7,368.57Mercury MerCruiser Complete Gearcase 8866A83 is a genuine OEM replacement lower gear housing for Bravo One XR sterndrives. It features a 1.35:1 gear ratio, heavy-duty propeller shaft, and dual water...8866A83- SKU:
- 8866A83
- Availability:
- Usually Ships within 24hours
- Weight:
- 912.00 Ounces
MSRP: $7,368.57Now: $6,852.99Was: $7,368.57 -
On Sale
Mercury MerCruiser Bravo I XR 1.26:1 Dual Water Pick-Up Complete Gearcase 8866A82
Mercury
MSRP: $7,368.57Now: $6,852.99Was: $7,368.57Mercury MerCruiser Complete Gearcase 8866A82 is a genuine OEM replacement gearcase for Bravo One XR sterndrives with a 1.26:1 gear ratio. It features a dual water pick-up configuration and heavy-duty...8866A82- SKU:
- 8866A82
- Availability:
- Usually Ships within 24hours
- Weight:
- 912.00 Ounces
MSRP: $7,368.57Now: $6,852.99Was: $7,368.57 -
On Sale
Mercury MerCruiser Bravo III XR SeaCore 2.43:1 Complete Gearcase 8866J25
Mercury
MSRP: $7,368.57Now: $6,852.99Was: $7,368.57Mercury MerCruiser Complete Gearcase 8866J25 is a genuine OEM SeaCore gearcase assembly for compatible Bravo III and Bravo III XR sterndrive applications. It features a 2.43:1 gear ratio with a 13/24...8866J25- SKU:
- 8866J25
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,344.00 Ounces
MSRP: $7,368.57Now: $6,852.99Was: $7,368.57 -
On Sale
Mercury Gear Case-BASIC CMBR GRY OEM 8M0225058
Mercury
MSRP: $7,345.00Now: $6,476.40Was: $7,345.00Genuine Mercury Gear Case-BASIC CMBR GRY, part number 8M0225058. Designed for use with compatible applications.8M0225058- SKU:
- 8M0225058
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $7,345.00Now: $6,476.40Was: $7,345.00 -
On Sale
Mercury Gear Case-BASIC CMBR GRY OEM 8M0225057
Mercury
MSRP: $7,345.00Now: $6,476.40Was: $7,345.00Genuine Mercury Gear Case-BASIC CMBR GRY, part number 8M0225057. Designed for use with compatible applications.8M0225057- SKU:
- 8M0225057
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $7,345.00Now: $6,476.40Was: $7,345.00 -
On Sale
Mercury 3.0L V6 1.75:1 Counter-Rotation XX-Long Complete Gearcase 880686A53
Mercury
MSRP: $7,278.55Now: $6,419.70Was: $7,278.55Mercury Complete Gearcase 880686A53 is a genuine OEM replacement gearcase for compatible 3.0L V6 Mercury OptiMax and Pro XS outboards. This configuration features a 1.75:1 gear ratio,...880686A53- SKU:
- 880686A53
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,104.00 Ounces
MSRP: $7,278.55Now: $6,419.70Was: $7,278.55 -
On Sale
Mercury 3.0L V6 1.75:1 Counter-Rotation X-Long Complete Gearcase 880686A52
Mercury
MSRP: $7,278.55Now: $6,419.70Was: $7,278.55Mercury Complete Gearcase 880686A52 is a genuine OEM replacement gearcase for compatible 3.0L V6 Mercury and Mariner outboards, including applicable OptiMax and Pro XS models. This configuration...880686A52- SKU:
- 880686A52
- Availability:
- Usually Ships within 24hours
- Weight:
- 992.00 Ounces
MSRP: $7,278.55Now: $6,419.70Was: $7,278.55 -
On Sale
Mercury GEAR HOUSING BASC OEM 8M0137073
Mercury
MSRP: $7,240.00Now: $6,381.90Was: $7,240.00Genuine Mercury GEAR HOUSING BASC, part number 8M0137073. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0102796.8M0137073- SKU:
- 8M0137073
- Availability:
- Usually Ships within 24hours
- Weight:
- 672.00 Ounces
MSRP: $7,240.00Now: $6,381.90Was: $7,240.00 -
On Sale
Mercury Gear Case SM BASIC WHITE OEM 8M0159710
Mercury
MSRP: $7,025.00Now: $6,192.90Was: $7,025.00Genuine Mercury Gear Case SM BASIC WHITE, part number 8M0159710. Designed for use with compatible applications.8M0159710- SKU:
- 8M0159710
- Availability:
- Usually Ships within 24hours
- Weight:
- 672.00 Ounces
MSRP: $7,025.00Now: $6,192.90Was: $7,025.00 -
On Sale
Mercury GEAR HOUSING BASC OEM 8M0137075
Mercury
MSRP: $6,995.00Now: $6,167.70Was: $6,995.00Genuine Mercury GEAR HOUSING BASC, part number 8M0137075. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0102797.8M0137075- SKU:
- 8M0137075
- Availability:
- Usually Ships within 24hours
- Weight:
- 688.00 Ounces
MSRP: $6,995.00Now: $6,167.70Was: $6,995.00 -
On Sale
Mercury 3.0L V6 1.75:1 XX-Long Complete Gearcase 880686A51
Mercury
MSRP: $6,828.55Now: $6,022.80Was: $6,828.55Mercury Complete Gearcase 880686A51 is a genuine OEM replacement gearcase for compatible 3.0L Mercury OptiMax and Pro XS outboards. This configuration features a 1.75:1 gear ratio, standard...880686A51- SKU:
- 880686A51
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,080.00 Ounces
MSRP: $6,828.55Now: $6,022.80Was: $6,828.55 -
On Sale
Mercury 3.0L V6 1.75:1 X-Long Complete Gearcase 880686A44
Mercury
MSRP: $6,828.55Now: $6,022.80Was: $6,828.55Mercury Complete Gearcase 880686A44 is a genuine OEM replacement gearcase for compatible 3.0L Mercury OptiMax and Pro XS outboards. This configuration features a 1.75:1 gear ratio, standard...880686A44- SKU:
- 880686A44
- Availability:
- Usually Ships within 24hours
- Weight:
- 992.00 Ounces
MSRP: $6,828.55Now: $6,022.80Was: $6,828.55 -
On Sale
Mercury Gear Case BRAVO III SC OEM 8866J08
Mercury
MSRP: $6,811.43Now: $6,334.49Was: $6,811.43Genuine Mercury Gear Case BRAVO III SC, part number 8866J08. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8866J02.8866J08- SKU:
- 8866J08
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,344.00 Ounces
MSRP: $6,811.43Now: $6,334.49Was: $6,811.43 -
On Sale
Mercury Gear Case BRAVO III SC OEM 8866J07
Mercury
MSRP: $6,811.43Now: $6,334.49Was: $6,811.43Genuine Mercury Gear Case BRAVO III SC, part number 8866J07. Designed for use with compatible applications.8866J07- SKU:
- 8866J07
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,328.00 Ounces
MSRP: $6,811.43Now: $6,334.49Was: $6,811.43 -
On Sale
Mercury MerCruiser Bravo III 2.43:1 Dual Water Pick-Up Complete Gearcase 8M0046682
Mercury
MSRP: $6,811.43Now: $6,334.49Was: $6,811.43Mercury MerCruiser Complete Gearcase 8M0046682 is a genuine OEM replacement gearcase for compatible Bravo III and Bravo III X sterndrives. This complete assembly features a 2.43:1 gear ratio, 13/24...8M0046682- SKU:
- 8M0046682
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,280.00 Ounces
MSRP: $6,811.43Now: $6,334.49Was: $6,811.43 -
On Sale
Mercury Gear Case BRAVO III SC OEM 8866J09
Mercury
MSRP: $6,811.43Now: $6,334.49Was: $6,811.43Genuine Mercury Gear Case BRAVO III SC, part number 8866J09. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8866J04.8866J09- SKU:
- 8866J09
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,312.00 Ounces
MSRP: $6,811.43Now: $6,334.49Was: $6,811.43 -
On Sale
Mercury Gear Case BRAVO III DWP OEM 8M0046738
Mercury
MSRP: $6,811.43Now: $6,334.49Was: $6,811.43Genuine Mercury Gear Case BRAVO III DWP, part number 8M0046738. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8866A20, 8866A32, 8866A35, 8866A67, 8866G04,...8M0046738- SKU:
- 8M0046738
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,264.00 Ounces
MSRP: $6,811.43Now: $6,334.49Was: $6,811.43
Prefer to Call? (727) 596-5929