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 30/40 4S 3C LG OEM 821306T17
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case 30/40 4S 3C LG, part number 821306T17. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 821306A17.821306T17- SKU:
- 821306T17
- Availability:
- Usually Ships within 24hours
- Weight:
- 464.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury Gear Case 40/50 2S LG OEM 821306T28
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case 40/50 2S LG, part number 821306T28. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 821306A28.821306T28- SKU:
- 821306T28
- Availability:
- Usually Ships within 24hours
- Weight:
- 480.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury Gear Case 40/50 2S SHORT OEM 821306T26
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case 40/50 2S SHORT, part number 821306T26. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 821306A26.821306T26- SKU:
- 821306T26
- Availability:
- Usually Ships within 24hours
- Weight:
- 480.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury Gear Case 60 BF LL-BLK OEM 9011G94
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case 60 BF LL-BLK, part number 9011G94. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 9011A71, 9011G14, 9011G30, 9011G47.9011G94- SKU:
- 9011G94
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,024.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury Gear Case 60 3CYL 2S LG OEM 9011G92
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case 60 3CYL 2S LG, part number 9011G92. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 9011A69, 9011G16, 9011G29, 9011G45.9011G92- SKU:
- 9011G92
- Availability:
- Usually Ships within 24hours
- Weight:
- 992.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury Gear Case COMP 60 2S XL OEM 9760T28
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case COMP 60 2S XL, part number 9760T28. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 9760A10, 9760A28.9760T28- SKU:
- 9760T28
- Availability:
- Usually Ships within 24hours
- Weight:
- 560.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury Gear Case COMP 60 2S LG OEM 9760T25
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case COMP 60 2S LG, part number 9760T25. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 9760A12, 9760A25, 9760A4.9760T25- SKU:
- 9760T25
- Availability:
- Usually Ships within 24hours
- Weight:
- 592.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury Gear Case COMP 60 2S SH OEM 9760T23
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case COMP 60 2S SH, part number 9760T23. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 9760A23, 9760A8.9760T23- SKU:
- 9760T23
- Availability:
- Usually Ships within 24hours
- Weight:
- 544.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury Gear Case 30/40 2S 2C LG OEM 821306T6
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case 30/40 2S 2C LG, part number 821306T6. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 821306A6.821306T6- SKU:
- 821306T6
- Availability:
- Usually Ships within 24hours
- Weight:
- 480.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury Gear Case 30/40 2S SH OEM 821306T8
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case 30/40 2S SH, part number 821306T8. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 821306A8.821306T8- SKU:
- 821306T8
- Availability:
- Usually Ships within 24hours
- Weight:
- 464.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury Gear Case 30-50 4S BLK OEM 821306T24
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Genuine Mercury Gear Case 30-50 4S BLK, part number 821306T24. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 821306A24.821306T24- SKU:
- 821306T24
- Availability:
- Usually Ships within 24hours
- Weight:
- 544.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury SPACER-5 IN Gear Case OEM 8M0177568
Mercury
MSRP: $2,999.49Now: $2,645.43Was: $2,999.49Genuine Mercury SPACER-5 IN Gear Case, part number 8M0177568. Designed for use with compatible applications.8M0177568- SKU:
- 8M0177568
- Availability:
- Usually Ships within 24hours
- Weight:
- 448.00 Ounces
MSRP: $2,999.49Now: $2,645.43Was: $2,999.49 -
On Sale
Mercury 40-60 HP Command Thrust X-Long Complete Gearcase 8M0118592
Mercury
MSRP: $2,971.43Now: $2,620.80Was: $2,971.43Mercury Complete Gearcase 8M0118592 is a genuine Mercury OEM replacement gearcase for select 40-60 HP Command Thrust outboards. This is the Generation 5 X-Long configuration desi8M0118592- SKU:
- 8M0118592
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $2,971.43Now: $2,620.80Was: $2,971.43 -
On Sale
Mercury Gear Case BASIC BLACK OEM 8M0142886
Mercury
MSRP: $2,963.99Now: $2,614.25Was: $2,963.99Genuine Mercury Gear Case BASIC BLACK, part number 8M0142886. Designed for use with compatible applications.8M0142886- SKU:
- 8M0142886
- Availability:
- Usually Ships within 24hours
- Weight:
- 448.00 Ounces
MSRP: $2,963.99Now: $2,614.25Was: $2,963.99 -
On Sale
Mercury 40-60 HP Command Thrust Long Complete Gearcase 8M0118591
Mercury
MSRP: $2,957.14Now: $2,608.20Was: $2,957.14Mercury Complete Gearcase 8M0118591 is a genuine Mercury OEM replacement lower unit for select 40-60 HP Command Thrust outboards. Mercury identifies this assembly as the Long, Generation 5 Command...8M0118591- SKU:
- 8M0118591
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $2,957.14Now: $2,608.20Was: $2,957.14 -
On Sale
Mercury Gear Case 5.44 BASIC SLV OEM 8M0199845
Mercury
MSRP: $2,870.00Now: $2,532.60Was: $2,870.00Genuine Mercury Gear Case 5.44 BASIC SLV, part number 8M0199845. Designed for use with compatible applications.8M0199845- SKU:
- 8M0199845
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $2,870.00Now: $2,532.60Was: $2,870.00 -
On Sale
Mercury MOTOR LOWER UNIT OEM 8M0204512
Mercury
MSRP: $2,836.99Now: $2,501.43Was: $2,836.99Genuine Mercury MOTOR LOWER UNIT, part number 8M0204512. Designed for use with compatible applications.8M0204512- SKU:
- 8M0204512
- Availability:
- Usually Ships within 24hours
- Weight:
- 208.90 Ounces
MSRP: $2,836.99Now: $2,501.43Was: $2,836.99 -
On Sale
Mercury Gear Case-BASIC SP OEM 8M0228005
Mercury
MSRP: $2,775.49Now: $2,447.93Was: $2,775.49Genuine Mercury Gear Case-BASIC SP, part number 8M0228005. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0200102.8M0228005- SKU:
- 8M0228005
- Availability:
- Usually Ships within 24hours
- Weight:
- 608.00 Ounces
MSRP: $2,775.49Now: $2,447.93Was: $2,775.49 -
On Sale
Mercury Gear Case-BASIC SP CTR OEM 8M0228006
Mercury
MSRP: $2,775.49Now: $2,447.93Was: $2,775.49Genuine Mercury Gear Case-BASIC SP CTR, part number 8M0228006. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0203873.8M0228006- SKU:
- 8M0228006
- Availability:
- Usually Ships within 24hours
- Weight:
- 624.00 Ounces
MSRP: $2,775.49Now: $2,447.93Was: $2,775.49 -
On Sale
Mercury Gear Case 5.44 BASIC CH OEM 8M0199871
Mercury
MSRP: $2,770.00Now: $2,444.40Was: $2,770.00Genuine Mercury Gear Case 5.44 BASIC CH, part number 8M0199871. Designed for use with compatible applications.8M0199871- SKU:
- 8M0199871
- Availability:
- Usually Ships within 24hours
- Weight:
- 544.00 Ounces
MSRP: $2,770.00Now: $2,444.40Was: $2,770.00
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