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 Racing 500R R-Drive Sport 1.60:1 XXX-Long Complete Gearcase (Graphite Gray) 8M0219809
Mercury
MSRP: $18,555.00Now: $16,361.10Was: $18,555.00Mercury Racing Complete Gearcase 8M0219809 is a genuine OEM replacement gearcase for the Mercury Racing 500R 4.6L V8 with the R-Drive Sport 1.60:1 gearcase. This configuration is standard rotation,...8M0219809- SKU:
- 8M0219809
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,120.00 Ounces
MSRP: $18,555.00Now: $16,361.10Was: $18,555.00Qty in Cart: 0Quantity:Price:MSRP: $18,555.00Now: $16,361.10Was: $18,555.00Subtotal: -
On Sale
Mercury R-Drive 1.60:1 XXL Complete Gearcase (Gray) 8M0236217
Mercury
MSRP: $18,520.00Now: $16,329.60Was: $18,520.00Mercury R-Drive Complete Gearcase 8M0236217 is a genuine Mercury OEM replacement gearcase assembly for select high-horsepower outboards equipped with the R-Drive gearcase system. This assembly is the8M0236217- SKU:
- 8M0236217
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,680.00 Ounces
MSRP: $18,520.00Now: $16,329.60Was: $18,520.00Qty in Cart: 0Quantity:Price:MSRP: $18,520.00Now: $16,329.60Was: $18,520.00Subtotal: -
On Sale
Mercury Racing 500R 1.60:1 Counter-Rotation XX-Long Complete Gearcase (Graphite Gray) 8M0236218
Mercury
MSRP: $18,520.00Now: $16,329.60Was: $18,520.00Mercury Racing 500R 1.60:1 Counter-Rotation XX-Long Complete Gearcase 8M0236218 is a genuine Mercury OEM gearcase assembly for select Mercury Racing 500R applications. The factory designation GC RDS...8M0236218- SKU:
- 8M0236218
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,120.00 Ounces
MSRP: $18,520.00Now: $16,329.60Was: $18,520.00Qty in Cart: 0Quantity:Price:MSRP: $18,520.00Now: $16,329.60Was: $18,520.00Subtotal: -
On Sale
Mercury Racing 500R 1.60:1 X-Long Complete Gearcase (Graphite Gray) 8M0236215
Mercury
MSRP: $18,485.00Now: $16,298.10Was: $18,485.00Mercury Racing 500R 1.60:1 X-Long Complete Gearcase 8M0236215 is a genuine Mercury OEM gearcase assembly for select Mercury Racing 500R applications. This is the standard-rotation, X-Long...8M0236215- SKU:
- 8M0236215
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $18,485.00Now: $16,298.10Was: $18,485.00Qty in Cart: 0Quantity:Price:MSRP: $18,485.00Now: $16,298.10Was: $18,485.00Subtotal: -
On Sale
Mercury Racing 500R 1.60:1 Counter-Rotation X-Long Complete Gearcase (Graphite Gray) 8M0236216
Mercury
MSRP: $18,485.00Now: $16,298.10Was: $18,485.00Mercury Racing 500R 1.60:1 Counter-Rotation X-Long Complete Gearcase 8M0236216 is a genuine Mercury OEM gearcase assembly for select Mercury Racing 500R applications. This configuration uses a 1.60:1...8M0236216- SKU:
- 8M0236216
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $18,485.00Now: $16,298.10Was: $18,485.00Qty in Cart: 0Quantity:Price:MSRP: $18,485.00Now: $16,298.10Was: $18,485.00Subtotal: -
On Sale
Mercury Racing 500R R-Drive Sport 1.60:1 Long Complete Gearcase (Graphite Gray) 8M0236219
Mercury
MSRP: $18,415.00Now: $16,235.10Was: $18,415.00Mercury Racing 500R R-Drive Sport 1.60:1 Long Complete Gearcase 8M0236219 is a genuine Mercury OEM complete gearcase assembly for Mercury Racing 500R 4.6L V8 outboards. This R-Drive Sport gearcase...8M0236219- SKU:
- 8M0236219
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $18,415.00Now: $16,235.10Was: $18,415.00Qty in Cart: 0Quantity:Price:MSRP: $18,415.00Now: $16,235.10Was: $18,415.00Subtotal: -
On Sale
Mercury Racing 500R R-Drive Sport 1.60:1 Counter-Rotation Long Complete Gearcase (Graphite Gray) 8M0236214
Mercury
MSRP: $18,415.00Now: $16,235.10Was: $18,415.00Mercury Racing Complete Gearcase 8M0236214 is a genuine OEM replacement gearcase for the Mercury Racing 500R 4.6L V8 with the R-Drive Sport 1.60:1 gearcase. This configuration is counter-rotation,...8M0236214- SKU:
- 8M0236214
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,408.00 Ounces
MSRP: $18,415.00Now: $16,235.10Was: $18,415.00Qty in Cart: 0Quantity:Price:MSRP: $18,415.00Now: $16,235.10Was: $18,415.00Subtotal: -
On Sale
Mercury Racing 500R R-Drive Sport 1.60:1 Long Complete Gearcase (Graphite Gray) 8M0236213
Mercury
MSRP: $18,415.00Now: $16,235.10Was: $18,415.00Mercury Racing Complete Gearcase 8M0236213 is a genuine OEM replacement gearcase for the Mercury Racing 500R 4.6L V8 with the R-Drive Sport 1.60:1 gearcase. This configuration is standard rotation,...8M0236213- SKU:
- 8M0236213
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,696.00 Ounces
MSRP: $18,415.00Now: $16,235.10Was: $18,415.00Qty in Cart: 0Quantity:Price:MSRP: $18,415.00Now: $16,235.10Was: $18,415.00Subtotal: -
On Sale
Mercury M8 Drive 20:25 Right-Hand Complete Gearcase 8M0090581
Mercury
MSRP: $18,415.00Now: $16,235.10Was: $18,415.00Mercury M8 Drive 20:25 Right-Hand Complete Gearcase 8M0090581 is a genuine Mercury OEM complete gear housing assembly for compatible M8 Drive applications. This configuration uses 20:25 gearing and...8M0090581- SKU:
- 8M0090581
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,392.00 Ounces
MSRP: $18,415.00Now: $16,235.10Was: $18,415.00Qty in Cart: 0Quantity:Price:MSRP: $18,415.00Now: $16,235.10Was: $18,415.00Subtotal: -
On Sale
Mercury Gear Case 500R G 1.6XXXL OEM 8M0236199
Mercury
MSRP: $16,410.00Now: $14,471.10Was: $16,410.00Genuine Mercury Gear Case 500R G 1.6XXXL, part number 8M0236199. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0210576.8M0236199- SKU:
- 8M0236199
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,680.00 Ounces
MSRP: $16,410.00Now: $14,471.10Was: $16,410.00Qty in Cart: 0Quantity:Price:MSRP: $16,410.00Now: $14,471.10Was: $16,410.00Subtotal: -
On Sale
Mercury Gear Case 500R G 1.6 C3X OEM 8M0210580
Mercury
MSRP: $16,410.00Now: $14,471.10Was: $16,410.00Genuine Mercury Gear Case 500R G 1.6 C3X, part number 8M0210580. Designed for use with compatible applications.8M0210580- SKU:
- 8M0210580
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $16,410.00Now: $14,471.10Was: $16,410.00Qty in Cart: 0Quantity:Price:MSRP: $16,410.00Now: $14,471.10Was: $16,410.00Subtotal: -
On Sale
Mercury Gear Case 500R G 1.6CXXL OEM 8M0236202
Mercury
MSRP: $16,375.00Now: $14,439.60Was: $16,375.00Genuine Mercury Gear Case 500R G 1.6CXXL, part number 8M0236202. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0210579.8M0236202- SKU:
- 8M0236202
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,952.00 Ounces
MSRP: $16,375.00Now: $14,439.60Was: $16,375.00Qty in Cart: 0Quantity:Price:MSRP: $16,375.00Now: $14,439.60Was: $16,375.00Subtotal: -
On Sale
Mercury Gear Case 500R G 1.60XXL OEM 8M0236197
Mercury
MSRP: $16,375.00Now: $14,439.60Was: $16,375.00Genuine Mercury Gear Case 500R G 1.60XXL, part number 8M0236197. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0210575.8M0236197- SKU:
- 8M0236197
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,632.00 Ounces
MSRP: $16,375.00Now: $14,439.60Was: $16,375.00Qty in Cart: 0Quantity:Price:MSRP: $16,375.00Now: $14,439.60Was: $16,375.00Subtotal: -
On Sale
Mercury Gear Case 500R G 1.60 XL OEM 8M0236196
Mercury
MSRP: $16,340.00Now: $14,408.10Was: $16,340.00Genuine Mercury Gear Case 500R G 1.60 XL, part number 8M0236196. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0210574.8M0236196- SKU:
- 8M0236196
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $16,340.00Now: $14,408.10Was: $16,340.00Qty in Cart: 0Quantity:Price:MSRP: $16,340.00Now: $14,408.10Was: $16,340.00Subtotal: -
On Sale
Mercury Gear Case 500R G 1.60CXL OEM 8M0236201
Mercury
MSRP: $16,340.00Now: $14,408.10Was: $16,340.00Genuine Mercury Gear Case 500R G 1.60CXL, part number 8M0236201. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0210578.8M0236201- SKU:
- 8M0236201
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,696.00 Ounces
MSRP: $16,340.00Now: $14,408.10Was: $16,340.00Qty in Cart: 0Quantity:Price:MSRP: $16,340.00Now: $14,408.10Was: $16,340.00Subtotal: -
On Sale
Mercury Gear Case 500R G 1.60 L OEM 8M0236195
Mercury
MSRP: $16,270.00Now: $14,345.10Was: $16,270.00Genuine Mercury Gear Case 500R G 1.60 L, part number 8M0236195. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0210573.8M0236195- SKU:
- 8M0236195
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $16,270.00Now: $14,345.10Was: $16,270.00Qty in Cart: 0Quantity:Price:MSRP: $16,270.00Now: $14,345.10Was: $16,270.00Subtotal: -
On Sale
Mercury Gear Case 500R G 1.60 CL OEM 8M0236200
Mercury
MSRP: $16,270.00Now: $14,345.10Was: $16,270.00Genuine Mercury Gear Case 500R G 1.60 CL, part number 8M0236200. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0210577.8M0236200- SKU:
- 8M0236200
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,728.00 Ounces
MSRP: $16,270.00Now: $14,345.10Was: $16,270.00Qty in Cart: 0Quantity:Price:MSRP: $16,270.00Now: $14,345.10Was: $16,270.00Subtotal: -
Mercury Complete Gearcase Sport Master XX-Long Long Cambered Grey 8M0236320
Mercury
MSRP: $16,125.00$13,706.25Mercury Complete Gearcase Sport Master XX-Long Long Cambered Grey 8M0236320 is a genuine Mercury Marine OEM complete gear housing assembly / lower unit for the compatible applications and...8M0236320- SKU:
- 8M0236320
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $16,125.00$13,706.25 -
On Sale
Mercury Gear Case SM CXXL GREY OEM 8M0236177
Mercury
MSRP: $16,125.00Now: $14,219.10Was: $16,125.00Genuine Mercury Gear Case SM CXXL GREY, part number 8M0236177. Designed for use with compatible applications. Replaces / supersedes Mercury part numbers: 8M0159666, 8M0189227.8M0236177- SKU:
- 8M0236177
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,424.00 Ounces
MSRP: $16,125.00Now: $14,219.10Was: $16,125.00Qty in Cart: 0Quantity:Price:MSRP: $16,125.00Now: $14,219.10Was: $16,125.00Subtotal: -
Mercury Complete Gearcase Sport Master XX-Long Long 1.60:1 Grey 8M0236317
Mercury
MSRP: $16,125.00$13,706.25Mercury Complete Gearcase Sport Master XX-Long Long 1.60:1 Grey 8M0236317 is a genuine Mercury Marine OEM complete gear housing assembly / lower unit for the compatible applications and configuration...8M0236317- SKU:
- 8M0236317
- Availability:
- Usually Ships within 24hours
- Weight:
- 1,360.00 Ounces
MSRP: $16,125.00$13,706.25
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