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 65-115 HP Standard Basic Gearcase Housing 8M0227985
Mercury
MSRP: $2,075.49Now: $1,830.40Was: $2,075.49Product Description Mercury Standard Basic Gearcase Housing 8M0227985 is a genuine Mercury OEM replacement housing for select8M0227985- SKU:
- 8M0227985
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $2,075.49Now: $1,830.40Was: $2,075.49 -
Mercury 115 HP Pro XS Silver Basic Gearcase Housing 8M0145316
Mercury
MSRP: $2,075.49$1,764.17Mercury Basic Gearcase Housing 8M0145316 is a genuine Mercury OEM replacement housing for select 115 HP EFI Pro XS FourStroke outboards. This is the silver, standard-rotation housing used with the 2...8M0145316- SKU:
- 8M0145316
- Availability:
- Usually Ships within 24hours
- Weight:
- 452.00 Ounces
MSRP: $2,075.49$1,764.17 -
On Sale
Mercury Basic Gearcase Housing 8M0057747
Mercury
MSRP: $1,971.49Now: $1,738.74Was: $1,971.49Mercury Basic Gearcase Housing 8M0057747 is a genuine Mercury OEM replacement housing for select Mercury 65-150 HP FourStroke outboards. It serves as the basic housing used across multiple compatible...8M0057747- SKU:
- 8M0057747
- Availability:
- Usually Ships within 24hours
- Weight:
- 448.00 Ounces
MSRP: $1,971.49Now: $1,738.74Was: $1,971.49 -
On Sale
Mercury Gear Case GENII -BASIC OEM 815822A36
Mercury
MSRP: $1,942.99Now: $1,713.54Was: $1,942.99Genuine Mercury Gear Case GENII -BASIC, part number 815822A36. Designed for use with compatible applications.815822A36- SKU:
- 815822A36
- Availability:
- Usually Ships within 24hours
- Weight:
- 404.80 Ounces
MSRP: $1,942.99Now: $1,713.54Was: $1,942.99 -
On Sale
Mercury SeaPro Basic Gearcase Housing 8M0099907
Mercury
MSRP: $1,857.49Now: $1,638.00Was: $1,857.49Mercury SeaPro Basic Gearcase Housing 8M0099907 is a genuine Mercury OEM replacement housing for select Mercury SeaPro FourStroke outboards. This basic housing is used across multiple SeaPro gearcase...8M0099907- SKU:
- 8M0099907
- Availability:
- Usually Ships within 24hours
- Weight:
- 432.00 Ounces
MSRP: $1,857.49Now: $1,638.00Was: $1,857.49 -
On Sale
Mercury Gear Case GENII -BASIC OEM 815822A30
Mercury
MSRP: $1,799.99Now: $1,587.54Was: $1,799.99Genuine Mercury Gear Case GENII -BASIC, part number 815822A30. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 815822A6.815822A30- SKU:
- 815822A30
- Availability:
- Usually Ships within 24hours
- Weight:
- 384.00 Ounces
MSRP: $1,799.99Now: $1,587.54Was: $1,799.99 -
On Sale
Mercury 65-115 HP Basic Gearcase Housing 8M0091538
Mercury
MSRP: $1,797.99Now: $1,585.52Was: $1,797.99Mercury Basic Gearcase Housing 8M0091538 is a genuine Mercury OEM replacement housing for select 65-115 HP EFI FourStroke outboards equipped with a standard-rotation gearcase. It serves as the main...8M0091538- SKU:
- 8M0091538
- Availability:
- Usually Ships within 24hours
- Weight:
- 448.00 Ounces
MSRP: $1,797.99Now: $1,585.52Was: $1,797.99 -
On Sale
Mercury GEAR HOUSING BLK OEM 9148T93
Mercury
MSRP: $1,791.49Now: $1,579.73Was: $1,791.49Genuine Mercury GEAR HOUSING BLK, part number 9148T93. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 9148A93.9148T93- SKU:
- 9148T93
- Availability:
- Usually Ships within 24hours
- Weight:
- 449.60 Ounces
MSRP: $1,791.49Now: $1,579.73Was: $1,791.49 -
On Sale
Mercury 40-60 HP Basic Gearcase Housing 9760T42
Mercury
MSRP: $1,749.99Now: $1,543.12Was: $1,749.99Mercury Basic Gearcase Housing 9760T42 is a genuine Mercury OEM replacement gear housing used on select 40-60 HP outboards. It is supplied as the basic gear housing only, making it9760T42- SKU:
- 9760T42
- Availability:
- Usually Ships within 24hours
- Weight:
- 292.80 Ounces
MSRP: $1,749.99Now: $1,543.12Was: $1,749.99 -
On Sale
Mercury Gear Case 15-20 4S S OEM 8M0172923
Mercury
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45Genuine Mercury Gear Case 15-20 4S S, part number 8M0172923. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0134483, 8M0163173, 8M0163175.8M0172923- SKU:
- 8M0172923
- Availability:
- Usually Ships within 24hours
- Weight:
- 320.00 Ounces
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45 -
On Sale
Mercury Gear Case 15-20 4S XL OEM 8M0172929
Mercury
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45Genuine Mercury Gear Case 15-20 4S XL, part number 8M0172929. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0134485, 8M0163181, 8M0163183.8M0172929- SKU:
- 8M0172929
- Availability:
- Usually Ships within 24hours
- Weight:
- 336.00 Ounces
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45 -
On Sale
Mercury Gear Case 15-20 4S S OEM 8M0163174
Mercury
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45Genuine Mercury Gear Case 15-20 4S S, part number 8M0163174. Designed for use with compatible applications.8M0163174- SKU:
- 8M0163174
- Availability:
- Usually Ships within 24hours
- Weight:
- 304.00 Ounces
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45 -
On Sale
Mercury Gear Case 15/20 4S XL OEM 8M0070898
Mercury
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45Genuine Mercury Gear Case 15/20 4S XL, part number 8M0070898. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 825132T33.8M0070898- SKU:
- 8M0070898
- Availability:
- Usually Ships within 24hours
- Weight:
- 336.00 Ounces
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45 -
On Sale
Mercury Gear Case 15/20 4S LG OEM 8M0070897
Mercury
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45Genuine Mercury Gear Case 15/20 4S LG, part number 8M0070897. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 825132T32.8M0070897- SKU:
- 8M0070897
- Availability:
- Usually Ships within 24hours
- Weight:
- 320.00 Ounces
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45 -
On Sale
Mercury Gear Case 15/20 4S SH OEM 8M0070896
Mercury
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45Genuine Mercury Gear Case 15/20 4S SH, part number 8M0070896. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 825132T31.8M0070896- SKU:
- 8M0070896
- Availability:
- Usually Ships within 24hours
- Weight:
- 288.00 Ounces
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45 -
On Sale
Mercury Gear Case-15 4S 2.00 SP OEM 803729A10
Mercury
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45Genuine Mercury Gear Case-15 4S 2.00 SP, part number 803729A10. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 803729A08.803729A10- SKU:
- 803729A10
- Availability:
- Usually Ships within 24hours
- Weight:
- 336.00 Ounces
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45 -
On Sale
Mercury Gear Case 15 4S LG BLK OEM 8833T35
Mercury
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45Genuine Mercury Gear Case 15 4S LG BLK, part number 8833T35. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8833A35.8833T35- SKU:
- 8833T35
- Availability:
- Usually Ships within 24hours
- Weight:
- 238.40 Ounces
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45 -
On Sale
Mercury DRIVESHAFT ASSY OEM 840979T1
Mercury
MSRP: $1,672.06Now: $1,474.31Was: $1,672.06Genuine Mercury DRIVESHAFT ASSY, part number 840979T1. Designed for use with compatible applications.840979T1- SKU:
- 840979T1
- Availability:
- Usually Ships within 24hours
- Weight:
- 84.00 Ounces
MSRP: $1,672.06Now: $1,474.31Was: $1,672.06 -
On Sale
Mercury GEARCASE BASIC ASSY - NON COMPLETED OEM 8M0118594
Mercury
MSRP: $1,569.49Now: $1,383.98Was: $1,569.49Genuine Mercury GEARCASE BASIC ASSY - NON COMPLETED, part number 8M0118594. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 893681T04.8M0118594- SKU:
- 8M0118594
- Availability:
- Usually Ships within 24hours
- Weight:
- 624.00 Ounces
MSRP: $1,569.49Now: $1,383.98Was: $1,569.49 -
On Sale
Mercury GEAR HOUSING ASSEMBLY-STD NON COMPLETED OEM 893680T06
Mercury
MSRP: $1,522.49Now: $1,342.78Was: $1,522.49Genuine Mercury GEAR HOUSING ASSEMBLY-STD NON COMPLETED, part number 893680T06. Designed for use with compatible applications.893680T06- SKU:
- 893680T06
- Availability:
- Usually Ships within 24hours
- Weight:
- 262.40 Ounces
MSRP: $1,522.49Now: $1,342.78Was: $1,522.49
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