Lower Units & Gearcases
Shop Mercury lower units and gearcase assemblies including OEM replacement components designed for reliable outboard performance and proper fitment. Lower units and gearcases play a critical role in transferring engine power, supporting propeller operation, and maintaining smooth drivetrain performance on the water.
Gregor’s Marine carries genuine Mercury gearcase and lower unit components for a wide range of outboard applications.
Call our team at (727) 596-5929 for assistance confirming fitment.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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Mercury Gear Case GENII CR-BASIC OEM 815822A28
Mercury
MSRP: $892.86$758.93Genuine Mercury Gear Case GENII CR-BASIC, part number 815822A28. Designed for use with compatible applications.815822A28- SKU:
- 815822A28
- Availability:
- Usually Ships within 24hours
- Weight:
- 395.20 Ounces
MSRP: $892.86$758.93 -
Mercury DRIVESHAFT ASSY OEM 858517A3
Mercury
MSRP: $792.99$674.04Genuine Mercury DRIVESHAFT ASSY, part number 858517A3. Designed for use with compatible applications.858517A3- SKU:
- 858517A3
- Availability:
- Usually Ships within 24hours
- Weight:
- 100.00 Ounces
MSRP: $792.99$674.04 -
Mercury Gear Case BASIC9.9/15 4S OEM 8M0083312
Mercury
MSRP: $770.49$654.92Genuine Mercury Gear Case BASIC9.9/15 4S, part number 8M0083312. Designed for use with compatible applications.8M0083312- SKU:
- 8M0083312
- Availability:
- Usually Ships within 24hours
- Weight:
- 120.00 Ounces
MSRP: $770.49$654.92 -
Mercury Gear Case BASIC 25/30 4S OEM 8M0057242
Mercury
MSRP: $740.49$629.42Genuine Mercury Gear Case BASIC 25/30 4S, part number 8M0057242. Designed for use with compatible applications.8M0057242- SKU:
- 8M0057242
- Availability:
- Usually Ships within 24hours
- Weight:
- 145.60 Ounces
MSRP: $740.49$629.42 -
Mercury Gear Case 40 2S SH INTL OEM 8M0127363
Mercury
MSRP: $735.70$625.35Genuine Mercury Gear Case 40 2S SH INTL, part number 8M0127363. Designed for use with compatible applications.8M0127363- SKU:
- 8M0127363
- Availability:
- Usually Ships within 24hours
- Weight:
- 496.00 Ounces
MSRP: $735.70$625.35 -
Mercury BASIC GEARCASE OEM 8M0135572
Mercury
MSRP: $726.99$617.94Genuine Mercury BASIC GEARCASE, part number 8M0135572. Designed for use with compatible applications.8M0135572- SKU:
- 8M0135572
- Availability:
- Usually Ships within 24hours
- Weight:
- 144.38 Ounces
MSRP: $726.99$617.94 -
Mercury COVER-GEARCASE OEM 8M0177487
Mercury
MSRP: $699.49$594.57Genuine Mercury COVER-GEARCASE, part number 8M0177487. Designed for use with compatible applications.8M0177487- SKU:
- 8M0177487
- Availability:
- Usually Ships within 24hours
- Weight:
- 208.96 Ounces
MSRP: $699.49$594.57 -
Mercury LOWER UNIT ASSY OEM M899360T
Mercury
MSRP: $579.69$492.74Genuine Mercury LOWER UNIT ASSY, part number M899360T. Designed for use with compatible applications.M899360T- SKU:
- M899360T
- Availability:
- Usually Ships within 24hours
- Weight:
- 215.52 Ounces
MSRP: $579.69$492.74 -
Mercury Gear Case BASIC 15/20 4S OEM 8M0070875
Mercury
MSRP: $566.99$481.94Genuine Mercury Gear Case BASIC 15/20 4S, part number 8M0070875. Designed for use with compatible applications.8M0070875- SKU:
- 8M0070875
- Availability:
- Usually Ships within 24hours
- Weight:
- 158.40 Ounces
MSRP: $566.99$481.94 -
Mercury Gear Case 5HP PROPN B L OEM 8M0188426
Mercury
MSRP: $564.49$479.82Genuine Mercury Gear Case 5HP PROPN B L, part number 8M0188426. Designed for use with compatible applications.8M0188426- SKU:
- 8M0188426
- Availability:
- Usually Ships within 24hours
- Weight:
- 176.00 Ounces
MSRP: $564.49$479.82 -
Mercury GEAR HOUSING B XL OEM 8M0155388
Mercury
MSRP: $564.49$479.82Genuine Mercury GEAR HOUSING B XL, part number 8M0155388. Designed for use with compatible applications.8M0155388- SKU:
- 8M0155388
- Availability:
- Usually Ships within 24hours
- Weight:
- 208.00 Ounces
MSRP: $564.49$479.82 -
Mercury Gear Case 4-5-6 4S B S OEM 8M0188408
Mercury
MSRP: $564.30$479.66Genuine Mercury Gear Case 4-5-6 4S B S, part number 8M0188408. Designed for use with compatible applications.8M0188408- SKU:
- 8M0188408
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $564.30$479.66 -
Mercury Gear Case 4-5 2S B L OEM 8M0188402
Mercury
MSRP: $564.30$479.66Genuine Mercury Gear Case 4-5 2S B L, part number 8M0188402. Designed for use with compatible applications.8M0188402- SKU:
- 8M0188402
- Availability:
- Usually Ships within 24hours
- Weight:
- 224.00 Ounces
MSRP: $564.30$479.66 -
Mercury Gear Case 4-5-6HP B L OEM 8M0188414
Mercury
MSRP: $564.30$479.66Genuine Mercury Gear Case 4-5-6HP B L, part number 8M0188414. Designed for use with compatible applications.8M0188414- SKU:
- 8M0188414
- Availability:
- Usually Ships within 24hours
- Weight:
- 0.00 Ounces
MSRP: $564.30$479.66 -
Mercury Gear Case 4-5 2S B L OEM 8M0155373
Mercury
MSRP: $564.30$479.66Genuine Mercury Gear Case 4-5 2S B L, part number 8M0155373. Designed for use with compatible applications.8M0155373- SKU:
- 8M0155373
- Availability:
- Usually Ships within 24hours
- Weight:
- 232.00 Ounces
MSRP: $564.30$479.66 -
Mercury GEAR HOUSING OEM 8M0122304
Mercury
MSRP: $564.30$479.66Genuine Mercury GEAR HOUSING, part number 8M0122304. Designed for use with compatible applications.8M0122304- SKU:
- 8M0122304
- Availability:
- Usually Ships within 24hours
- Weight:
- 216.00 Ounces
MSRP: $564.30$479.66 -
Mercury Gear Case 4-5-6 2S 4S L OEM 8M0122308
Mercury
MSRP: $564.30$479.66Genuine Mercury Gear Case 4-5-6 2S 4S L, part number 8M0122308. Designed for use with compatible applications.8M0122308- SKU:
- 8M0122308
- Availability:
- Usually Ships within 24hours
- Weight:
- 181.01 Ounces
MSRP: $564.30$479.66 -
Mercury Gear Case 4/5/6 4S XLONG OEM 8M0063900
Mercury
MSRP: $564.30$479.66Genuine Mercury Gear Case 4/5/6 4S XLONG, part number 8M0063900. Designed for use with compatible applications.8M0063900- SKU:
- 8M0063900
- Availability:
- Usually Ships within 24hours
- Weight:
- 208.00 Ounces
MSRP: $564.30$479.66 -
Mercury Gear Case 25-30 4S B L OEM 8M0187032
Mercury
MSRP: $562.50$478.13Genuine Mercury Gear Case 25-30 4S B L, part number 8M0187032. Designed for use with compatible applications.8M0187032- SKU:
- 8M0187032
- Availability:
- Usually Ships within 24hours
- Weight:
- 352.00 Ounces
MSRP: $562.50$478.13 -
Mercury Gear Case 25-30 4S B S OEM 8M0187031
Mercury
MSRP: $562.50$478.13Genuine Mercury Gear Case 25-30 4S B S, part number 8M0187031. Designed for use with compatible applications.8M0187031- SKU:
- 8M0187031
- Availability:
- Usually Ships within 24hours
- Weight:
- 352.00 Ounces
MSRP: $562.50$478.13
Prefer to Call? (727) 596-5929