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 Gear Case 2.5L XL 2.1 OEM 9148T82
Mercury
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70Genuine Mercury Gear Case 2.5L XL 2.1, part number 9148T82. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 6671A9, 7321A10, 7350A18, 9148A19, 9148A67,...9148T82- SKU:
- 9148T82
- Availability:
- Usually Ships within 24hours
- Weight:
- 944.00 Ounces
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70 -
On Sale
Mercury Gear Case 2.5L-L 2.0:1 OEM 9148T81
Mercury
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70Genuine Mercury Gear Case 2.5L-L 2.0:1, part number 9148T81. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 6050A2, 6464A4, 6671A5, 7321A9, 7350A17,...9148T81- SKU:
- 9148T81
- Availability:
- Usually Ships within 24hours
- Weight:
- 944.00 Ounces
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70 -
On Sale
Mercury Gear Case 2.5L XL 1.87 OEM 9148T85
Mercury
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70Genuine Mercury Gear Case 2.5L XL 1.87, part number 9148T85. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 7350A27, 7350A6, 8688A2, 9148A72, 9148A85,...9148T85- SKU:
- 9148T85
- Availability:
- Usually Ships within 24hours
- Weight:
- 888.00 Ounces
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70 -
On Sale
Mercury Gear Case 2.5 LG 1.87 OEM 9148T84
Mercury
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70Genuine Mercury Gear Case 2.5 LG 1.87, part number 9148T84. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 6693A3, 7350A26, 7350A5, 7350A63, 8688A1,...9148T84- SKU:
- 9148T84
- Availability:
- Usually Ships within 24hours
- Weight:
- 888.00 Ounces
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70 -
On Sale
Mercury Gear Case 115-125 XL BLK OEM 9011J9
Mercury
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70Genuine Mercury Gear Case 115-125 XL BLK, part number 9011J9. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 9011G12, 9011G49.9011J9- SKU:
- 9011J9
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,040.00 Ounces
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70 -
On Sale
Mercury Gear Case 115-125 LG BLK OEM 9011J6
Mercury
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70Genuine Mercury Gear Case 115-125 LG BLK, part number 9011J6. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 9011G10, 9011G51.9011J6- SKU:
- 9011J6
- Availability:
- Usually Ships within 24hours
- Weight:
- 928.00 Ounces
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70 -
On Sale
Mercury Gear Case 75-90 XL BLK OEM 9011J23
Mercury
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70Genuine Mercury Gear Case 75-90 XL BLK, part number 9011J23. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 9011G5, 9011G53.9011J23- SKU:
- 9011J23
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,024.00 Ounces
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70 -
On Sale
Mercury Gear Case 75-125 LG 2.33 OEM 9011J15
Mercury
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70Genuine Mercury Gear Case 75-125 LG 2.33, part number 9011J15. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 9011G1, 9011G57.9011J15- SKU:
- 9011J15
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,008.00 Ounces
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70 -
On Sale
Mercury Gear Case ALPH GENII C/R OEM 815822A52
Mercury
MSRP: $3,164.29Now: $2,942.99Was: $3,164.29Genuine Mercury Gear Case ALPH GENII C/R, part number 815822A52. Designed for use with compatible applications.815822A52- SKU:
- 815822A52
- Availability:
- Usually Ships within 24hours
- Weight:
- 800.00 Ounces
MSRP: $3,164.29Now: $2,942.99Was: $3,164.29 -
On Sale
Mercury Gear Case ALPH GENII C/R OEM 815822A47
Mercury
MSRP: $3,164.29Now: $2,942.99Was: $3,164.29Genuine Mercury Gear Case ALPH GENII C/R, part number 815822A47. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 815822A33, 815822A7.815822A47- SKU:
- 815822A47
- Availability:
- Usually Ships within 24hours
- Weight:
- 752.00 Ounces
MSRP: $3,164.29Now: $2,942.99Was: $3,164.29 -
On Sale
Mercury Gear Case BASIC SILVR OEM 8M0228041
Mercury
MSRP: $3,157.49Now: $2,784.54Was: $3,157.49Genuine Mercury Gear Case BASIC SILVR, part number 8M0228041. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0145768.8M0228041- SKU:
- 8M0228041
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,120.00 Ounces
MSRP: $3,157.49Now: $2,784.54Was: $3,157.49 -
On Sale
Mercury DRIVE PLATE ASSY. OEM 8M0104792
Mercury
MSRP: $3,156.43Now: $2,783.14Was: $3,156.43Genuine Mercury DRIVE PLATE ASSY., part number 8M0104792. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0001095, 8M0058750, 8M0104767.8M0104792- SKU:
- 8M0104792
- Availability:
- Usually Ships within 24hours
- Weight:
- 199.01 Ounces
MSRP: $3,156.43Now: $2,783.14Was: $3,156.43 -
On Sale
Mercury MOTOR LOWER UNIT OEM 8M0204513
Mercury
MSRP: $3,146.99Now: $2,775.65Was: $3,146.99Genuine Mercury MOTOR LOWER UNIT, part number 8M0204513. Designed for use with compatible applications.8M0204513- SKU:
- 8M0204513
- Availability:
- Usually Ships within 24hours
- Weight:
- 212.70 Ounces
MSRP: $3,146.99Now: $2,775.65Was: $3,146.99 -
On Sale
Mercury Gear Case 40 2S LG OEM 8M0127365
Mercury
MSRP: $3,085.70Now: $2,721.60Was: $3,085.70Genuine Mercury Gear Case 40 2S LG, part number 8M0127365. Designed for use with compatible applications.8M0127365- SKU:
- 8M0127365
- Availability:
- Usually Ships within 24hours
- Weight:
- 672.00 Ounces
MSRP: $3,085.70Now: $2,721.60Was: $3,085.70 -
On Sale
Mercury Gear Case BASIC BLACK SP OEM 8M0145771
Mercury
MSRP: $3,079.49Now: $2,715.99Was: $3,079.49Genuine Mercury Gear Case BASIC BLACK SP, part number 8M0145771. Designed for use with compatible applications.8M0145771- SKU:
- 8M0145771
- Availability:
- Usually Ships within 24hours
- Weight:
- 536.00 Ounces
MSRP: $3,079.49Now: $2,715.99Was: $3,079.49 -
On Sale
Mercury Gear Case 60R 4S OEM 8M0171553
Mercury
MSRP: $3,033.99Now: $2,675.80Was: $3,033.99Genuine Mercury Gear Case 60R 4S, part number 8M0171553. Designed for use with compatible applications.8M0171553- SKU:
- 8M0171553
- Availability:
- Usually Ships within 24hours
- Weight:
- 944.00 Ounces
MSRP: $3,033.99Now: $2,675.80Was: $3,033.99 -
On Sale
Mercury GEAR HOUSING COMP OEM 8M0121551
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury GEAR HOUSING COMP, part number 8M0121551. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 825132A26, 8M0046099, 8M0119568.8M0121551- SKU:
- 8M0121551
- Availability:
- Usually Ships within 24hours
- Weight:
- 672.50 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury Gear Case 40-60 4S LG OEM 9011G90
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case 40-60 4S LG, part number 9011G90. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 893508T01, 9011G70.9011G90- SKU:
- 9011G90
- Availability:
- Usually Ships within 24hours
- Weight:
- 976.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury Gear Case 40 EFI LG OEM 9760T44
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case 40 EFI LG, part number 9760T44. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 893507T04.9760T44- SKU:
- 9760T44
- Availability:
- Usually Ships within 24hours
- Weight:
- 592.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury Gear Case 40 BF 4S LG OEM 9011G86
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case 40 BF 4S LG, part number 9011G86. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 9011G18, 9011G43.9011G86- SKU:
- 9011G86
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,024.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15
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