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 8M0236229
Mercury
MSRP: $11,250.00Now: $9,922.50Was: $11,250.00Mercury L6 Verado 1.75:1 Counter-Rotation X-Long Complete Gearcase 8M0236229 is a genuine Mercury OEM complete gearcase assembly for compatible L6 Verado outboards. This gearcase has a 1.75:1 gear...8M0236229- SKU:
- 8M0236229
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,568.00 Ounces
MSRP: $11,250.00Now: $9,922.50Was: $11,250.00Qty in Cart: 0Quantity:Price:MSRP: $11,250.00Now: $9,922.50Was: $11,250.00Subtotal: -
On Sale
Mercury L6 Verado 1.75:1 XXL Complete Gearcase 8M0236240
Mercury
MSRP: $9,121.45Now: $8,045.10Was: $9,121.45Mercury Complete Gearcase 8M0236240 is an OEM replacement lower unit for select Mercury L6 Verado FourStroke outboards. This gearcase features a 1.75:1 gear ratio, standard rotation, and8M0236240- SKU:
- 8M0236240
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,280.00 Ounces
MSRP: $9,121.45Now: $8,045.10Was: $9,121.45 -
On Sale
Mercury 65-115 HP Complete Gearcase, 2.07:1, 20-Inch 8M0088072
Mercury
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70Mercury Complete Gearcase 8M0088072 is an OEM replacement lower unit for select 65-115 HP EFI FourStroke outboards. This complete gearcase features a 2.07:1 gear ratio, standard rotation,8M0088072- SKU:
- 8M0088072
- Availability:
- Usually Ships within 24hours
- Weight:
- 896.00 Ounces
MSRP: $3,185.70Now: $2,809.80Was: $3,185.70 -
On Sale
Mercury 40-60 HP FourStroke Complete Gearcase, 1.83:1 8M0086325
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Mercury Complete Gearcase Assembly 8M0086325 is an OEM replacement lower unit for select Mercury and Mariner 40-60 HP 4-cylinder EFI FourStroke outboards. It is a complete gear housing assembly with...8M0086325- SKU:
- 8M0086325
- Availability:
- Usually Ships within 24hours
- Weight:
- 592.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury 40-60 HP 4-Cylinder FourStroke Complete Gearcase 9760T41
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Mercury Complete Gearcase 9760T41 is a genuine Mercury OEM replacement lower unit for select 40, 50, and 60 HP 4-cylinder FourStroke outboards. This complete Long gearcase features a 1.839760T41- SKU:
- 9760T41
- Availability:
- Usually Ships within 24hours
- Weight:
- 544.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury 30-40 HP 3-Cylinder FourStroke Long Complete Gearcase 8M0086324
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Mercury Complete Gearcase 8M0086324 is a genuine Mercury OEM replacement lower unit for select 30-40 HP 3-cylinder FourStroke outboards. This assembly is the Long (20-inch) configuration<8M0086324- SKU:
- 8M0086324
- Availability:
- Usually Ships within 24hours
- Weight:
- 592.75 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury 30-40 HP 3-Cylinder FourStroke Short Complete Gearcase 8M0086323
Mercury
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15Mercury Complete Gearcase 8M0086323 is a genuine Mercury OEM replacement lower unit for select 30-40 HP 3-cylinder FourStroke outboards. This assembly is the Short configuration8M0086323- SKU:
- 8M0086323
- Availability:
- Usually Ships within 24hours
- Weight:
- 672.00 Ounces
MSRP: $3,007.15Now: $2,652.30Was: $3,007.15 -
On Sale
Mercury 15-20 HP FourStroke Long Complete Gearcase 8M0172925
Mercury
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45Mercury Complete Gearcase 8M0172925 is a genuine Mercury OEM replacement lower unit for select 15 and 20 HP FourStroke outboards. This assembly is the Long (20-inch) configuration8M0172925- SKU:
- 8M0172925
- Availability:
- Usually Ships within 24hours
- Weight:
- 320.00 Ounces
MSRP: $1,721.45Now: $1,518.30Was: $1,721.45 -
On Sale
Mercury M8 Drive 22:25 Left-Hand Complete Gearcase 8M0090580
Mercury
MSRP: $61,570.00Now: $54,287.10Was: $61,570.00Mercury M8 Drive 22:25 Left-Hand Complete Gearcase 8M0090580 is a genuine Mercury OEM complete gear housing assembly for compatible M8 drive applications. This configuration uses a 22:25 gear set and...8M0090580- SKU:
- 8M0090580
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $61,570.00Now: $54,287.10Was: $61,570.00Qty in Cart: 0Quantity:Price:MSRP: $61,570.00Now: $54,287.10Was: $61,570.00Subtotal: -
On Sale
Mercury M8 Drive 22:25 Right-Hand Complete Gearcase 8M0090579
Mercury
MSRP: $61,570.00Now: $54,287.10Was: $61,570.00Mercury M8 Drive 22:25 Right-Hand Complete Gearcase 8M0090579 is a genuine Mercury OEM complete gear housing assembly for compatible M8 Drive applications. This configuration uses 22:25 gearing and...8M0090579- SKU:
- 8M0090579
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $61,570.00Now: $54,287.10Was: $61,570.00Qty in Cart: 0Quantity:Price:MSRP: $61,570.00Now: $54,287.10Was: $61,570.00Subtotal: -
On Sale
Mercury M8 Drive 21:25 Right-Hand Complete Gearcase 8M0090578
Mercury
MSRP: $60,125.00Now: $53,014.50Was: $60,125.00Mercury M8 Drive 21:25 Right-Hand Complete Gearcase 8M0090578 is a genuine Mercury OEM complete gear housing assembly for compatible M8 Drive applications. This configuration uses 21:25 gearing and...8M0090578- SKU:
- 8M0090578
- Availability:
- Usually Ships within 24hours
- Weight:
- 3,200.00 Ounces
MSRP: $60,125.00Now: $53,014.50Was: $60,125.00Qty in Cart: 0Quantity:Price:MSRP: $60,125.00Now: $53,014.50Was: $60,125.00Subtotal: -
On Sale
Mercury M8 Drive 21:25 Left-Hand Complete Gearcase 8M0090576
Mercury
MSRP: $60,125.00Now: $53,014.50Was: $60,125.00Mercury M8 Drive 21:25 Left-Hand Complete Gearcase 8M0090576 is a genuine Mercury OEM complete gear housing assembly for compatible M8 Drive applications. This configuration uses 21:25 gearing and...8M0090576- SKU:
- 8M0090576
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $60,125.00Now: $53,014.50Was: $60,125.00Qty in Cart: 0Quantity:Price:MSRP: $60,125.00Now: $53,014.50Was: $60,125.00Subtotal: -
On Sale
Mercury M8 Drive 22:25 Right-Hand Complete Gearcase 8M0069709
Mercury
MSRP: $58,680.00Now: $51,741.90Was: $58,680.00Mercury M8 Drive 22:25 Right-Hand Complete Gearcase 8M0069709 is a genuine Mercury OEM complete gear housing assembly for compatible MerCruiser M8 Drive applications. This configuration uses 22:25...8M0069709- SKU:
- 8M0069709
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $58,680.00Now: $51,741.90Was: $58,680.00Qty in Cart: 0Quantity:Price:MSRP: $58,680.00Now: $51,741.90Was: $58,680.00Subtotal: -
On Sale
Mercury M8 Drive 22:25 Left-Hand Complete Gearcase 8M0069710
Mercury
MSRP: $58,680.00Now: $51,741.90Was: $58,680.00Mercury M8 Drive 22:25 Left-Hand Complete Gearcase 8M0069710 is a genuine Mercury OEM complete gear housing assembly for compatible MerCruiser M8 Drive applications. This configuration uses 22:25...8M0069710- SKU:
- 8M0069710
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $58,680.00Now: $51,741.90Was: $58,680.00Qty in Cart: 0Quantity:Price:MSRP: $58,680.00Now: $51,741.90Was: $58,680.00Subtotal: -
On Sale
Mercury M8 Drive 21:25 Right-Hand Complete Gearcase 8M8026003
Mercury
MSRP: $54,000.00Now: $47,615.40Was: $54,000.00Mercury M8 Drive 21:25 Right-Hand Complete Gearcase 8M8026003 is a genuine Mercury OEM complete gear housing assembly for compatible MerCruiser M8 Drive applications. This configuration uses 21:25...8M8026003- SKU:
- 8M8026003
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $54,000.00Now: $47,615.40Was: $54,000.00Qty in Cart: 0Quantity:Price:MSRP: $54,000.00Now: $47,615.40Was: $54,000.00Subtotal: -
On Sale
Mercury M8 Drive 21:25 Left-Hand Complete Gearcase 8M8026002
Mercury
MSRP: $54,000.00Now: $47,615.40Was: $54,000.00Mercury M8 Drive 21:25 Left-Hand Complete Gearcase 8M8026002 is a genuine Mercury OEM complete gear housing assembly for compatible MerCruiser M8 Drive applications. This configuration uses 21:25...8M8026002- SKU:
- 8M8026002
- Availability:
- Usually Ships within 24hours
- Weight:
- 3,184.00 Ounces
MSRP: $54,000.00Now: $47,615.40Was: $54,000.00Qty in Cart: 0Quantity:Price:MSRP: $54,000.00Now: $47,615.40Was: $54,000.00Subtotal: -
On Sale
Mercury M6 Drive 19:21 Right-Hand Complete Gearcase 8M0134334
Mercury
MSRP: $48,580.00Now: $42,833.70Was: $48,580.00Mercury M6 Drive 19:21 Right-Hand Complete Gearcase 8M0134334 is a genuine Mercury OEM complete gear housing assembly for compatible MerCruiser M6 Drive applications. This configuration uses 19:21...8M0134334- SKU:
- 8M0134334
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $48,580.00Now: $42,833.70Was: $48,580.00Qty in Cart: 0Quantity:Price:MSRP: $48,580.00Now: $42,833.70Was: $48,580.00Subtotal: -
On Sale
Mercury M6 Drive 19:21 Left-Hand Complete Gearcase 8M0134335
Mercury
MSRP: $48,580.00Now: $42,833.70Was: $48,580.00Mercury M6 Drive 19:21 Left-Hand Complete Gearcase 8M0134335 is a genuine Mercury OEM complete gear housing assembly for compatible MerCruiser M6 Drive applications. This configuration uses 19:21...8M0134335- SKU:
- 8M0134335
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $48,580.00Now: $42,833.70Was: $48,580.00Qty in Cart: 0Quantity:Price:MSRP: $48,580.00Now: $42,833.70Was: $48,580.00Subtotal: -
On Sale
Mercury M6 Drive 19:20 Left-Hand Complete Gearcase 8M0134333
Mercury
MSRP: $42,505.00Now: $37,478.70Was: $42,505.00Mercury M6 Drive 19:20 Left-Hand Complete Gearcase 8M0134333 is a genuine Mercury OEM complete gear housing assembly for compatible MerCruiser M6 Drive applications. This configuration uses 19:20...8M0134333- SKU:
- 8M0134333
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $42,505.00Now: $37,478.70Was: $42,505.00Qty in Cart: 0Quantity:Price:MSRP: $42,505.00Now: $37,478.70Was: $42,505.00Subtotal: -
On Sale
Mercury M6 Drive 19:20 Right-Hand Complete Gearcase 8M0134332
Mercury
MSRP: $42,505.00Now: $37,478.70Was: $42,505.00Mercury M6 Drive 19:20 Right-Hand Complete Gearcase 8M0134332 is a genuine Mercury OEM complete gear housing assembly for compatible MerCruiser M6 Drive applications. This configuration uses 19:20...8M0134332- SKU:
- 8M0134332
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $42,505.00Now: $37,478.70Was: $42,505.00Qty in Cart: 0Quantity:Price:MSRP: $42,505.00Now: $37,478.70Was: $42,505.00Subtotal:
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