Mercury Lower Unit
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Mercury Outboard Lower Unit Replacement – Fits Most 3 & 4 Cylinder – 2.07 & 2.33 Ratios – 2 & 4 Stroke – Aftermarket
SKU:
ST-90-205
Rated 4.20 out of 5
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Mercury Outboard Lower Unit Replacement – Fits 2.0L, 2.4L, 2.5L – 1.87 & 2.0 Ratios – Aftermarket
SKU:
ST-90-206
Rated 4.00 out of 5
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Mercury Outboard Lower Unit Replacement – Fits 3L – 1.62 & 1.75 Ratios – Aftermarket
SKU:
ST-90-216
Rated 4.12 out of 5
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Mercury Outboard Lower Unit Replacement – Fits 3L – 1.62 & 1.75 Ratios – Counter Rotation – Aftermarket
SKU:
ST-90-218
Rated 3.79 out of 5
Mercury Outboard Lower Unit Replacement – Fits 3.0L V6 / 2.6L I6 / 1.7L I4 (13 & 20 Splines) – 1.75 / 1.85 / 2.08 Ratios
SKU:
ST-90-221
Rated 4.15 out of 5
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New Mercury 75–125HP Outboard lower unit – 3 CYL DFI/OPTIMAX 2004-2018 – New/Remanufactured
SKU:
OBR-ME-G3-09-N
$2,522.00 – $2,822.00Price range: $2,522.00 through $2,822.00-10%
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New Mercury 150-200 HP DFI V6 3.0L Outboard Lower Unit (1979–2018) – New / Remanufactured
SKU:
OBR-ME-G6-08A-N
$2,529.00 – $3,369.00Price range: $2,529.00 through $3,369.00-10%
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New Mercury 40–60 HP 4-Cylinder Bigfoot 4-Stroke Outboard Lower Unit (2001–2024) – New / Re-manufactured
SKU:
OBR-ME-G3-05
$2,552.00 – $3,497.00Price range: $2,552.00 through $3,497.00-10%
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New Mercury 110–125 HP L4 Outboard Lower Unit 4-CYL – 3-Jaw / 6-Jaw (1988–2006) – New / Re-Manufactured
SKU:
OBR-ME-G4-02-N
$2,559.00 – $2,829.00Price range: $2,559.00 through $2,829.00-10%
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New Mercury 75–90 HP 4-Cylinder 4-Stroke Outboard Lower Unit (2000–2006) – New / Re-manufactured
SKU:
OBR-ME-G4-08-N
$2,559.00 – $2,829.00Price range: $2,559.00 through $2,829.00-10%
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New Mercury 75–115 HP Outboard Lower Unit – 4-Cylinder 4-Stroke (2014–2024) – PRO XS, Command Thrust – New / Remanufactured
SKU:
OBR-ME-G4-07D-N
$2,559.00 – $3,909.00Price range: $2,559.00 through $3,909.00-10%
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New Mercury 115 HP 4-CYL 4-Stroke Lower Unit (2001–2003) – New / Re-manufactured
SKU:
OBR-ME-G4-06-
$2,559.00 – $2,959.00Price range: $2,559.00 through $2,959.00-10%
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New Mercury 110–125 HP L4 & 70–90 HP 3-Cylinder Outboard Lower Units – 3-Jaw / 6-Jaw – New & Remanufactured
SKU:
OBR-ME-G3-06-N
$2,559.00 – $2,829.00Price range: $2,559.00 through $2,829.00-10%
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New Mercury 135-150 HP V6 Outboard Lower Unit DFI – 2:1 Gear Ratio (1979–2014) – New / Re-manufactured
SKU:
OBR-ME-G6-03A-N
$2,689.00 – $2,959.00Price range: $2,689.00 through $2,959.00-10%
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New Mercury 50–60 HP 3-Cylinder BIGFOOT Outboard Lower Unit (1991–2008) – Remanufactured – L Shaft
SKU:
OBR-ME-G3-05A
$2,689.00 – $2,829.00Price range: $2,689.00 through $2,829.00-10%
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New Mercury 200-250 HP DFI V6 3.0L Outboard Lower Unit (1994–2018) – New / Re-manufactured
SKU:
OBR-ME-G6-12A-N
$2,689.00 – $5,259.00Price range: $2,689.00 through $5,259.00-10%
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New Mercury 150HP Outboard Lower Unit – 4-STRK Counter Rotation – F150 PRO XS / F150 SEAPRO (2011–2024) – New / Re-manufactured
SKU:
OBR-ME-G4-15-N
$3,369.00 – $5,799.00Price range: $3,369.00 through $5,799.00-10%
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New Mercury 200-250 HP DFI Counter Rotation V6 3.0L Outboard Lower Unit (2008–2018) – New / Re-manufactured
SKU:
OBR-ME-G6-16B-N
$4,989.00 – $5,529.00Price range: $4,989.00 through $5,529.00-10%
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New Mercury 135–200 HP 4-CYL VERADO Outboard Lower Unit (2006–2019) – New / Re-manufactured
SKU:
OBR-ME-G4-11-N
$5,259.00 – $6,069.00Price range: $5,259.00 through $6,069.00-10%
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New Mercury 200–300 HP 6-CYL VERADO Outboard Lower Unit (2005–2020) – New / Re-manufactured
SKU:
OBR-ME-G6-18-N
$5,259.00 – $6,069.00Price range: $5,259.00 through $6,069.00Mercury Lower Units
AllBoatSupplies.com offers premium Mercury lower units designed to ensure maximum performance, reliability, and durability for your Mercury outboard engines. Our selection includes both OEM replacement units and high-quality aftermarket units to fit a wide range of Mercury engines from 40 HP to 400 HP, covering 4-CYL, V6, and V8 configurations, with L, XL, and XXL shaft options.
Replacement Mercury Lower Units
OEM replacement lower units are manufactured to match original Mercury specifications, ensuring a perfect fit, smooth gear operation, and proper shaft alignment. These units are ideal for restoring your outboard motor to factory performance, maintaining engine reliability, and preventing premature wear.
Aftermarket Mercury Lower Units
Our aftermarket Mercury lower units provide a cost-effective alternative to OEM replacements without compromising on quality. Designed to meet or exceed Mercury’s standards, these units deliver reliable power transfer, durability, and optimal performance for engines ranging from 40 HP to 400 HP. Aftermarket units are perfect for boat owners looking for performance upgrades or replacements with extended availability.
Key Features of Mercury Lower Units
- Durable Construction: Built from high-strength aluminum or stainless steel to resist corrosion and withstand harsh marine conditions.
- Efficient Power Transmission: Transfers engine power to the propeller for smooth forward and reverse motion.
- Precision Gearbox & Shafts: Houses high-quality gears, driveshafts, and propeller shafts for optimal propulsion and longevity.
- Seals & Lubrication: Watertight seals and an integrated lubrication system protect internal components from corrosion and wear.
- Trim & Tilt Compatibility: Some units allow angle adjustments for better fuel efficiency, handling, and boat maneuverability.
- OEM & Aftermarket Options: Choose between replacement units that restore factory performance or aftermarket units for cost-effective upgrades.
- Warranty Coverage: Many units include a 1-year manufacturer or supplier-backed warranty for peace of mind.
- Wide Compatibility: Fits Mercury 4-CYL, V6, and V8 engines with various horsepower, shaft lengths, and gear ratios.
Frequently Asked Questions (FAQ)
1. What are Mercury replacement lower units?
Replacement lower units are OEM-quality parts built to match original Mercury specifications. They restore your engine to factory performance, providing smooth gear operation and proper alignment.
2. Are aftermarket Mercury lower units reliable?
Yes, high-quality aftermarket units meet or exceed OEM standards. They deliver reliable performance, durability, and compatibility with Mercury outboard engines from 40 HP to 400 HP.
3. Which Mercury lower unit fits my engine?
We offer lower units for Mercury 4-CYL, V6, and V8 engines with L, XL, and XXL shafts, multiple gear ratios, and re-manufactured or new options. Always check your engine’s model, HP, and year before purchasing.
4. How do I maintain my Mercury lower unit?
Regularly inspect gears and bearings, lubricate moving parts, replace worn seals, and keep the unit clean to prevent corrosion and ensure optimal performance.
5. How long will a Mercury lower unit last?
With proper maintenance, both replacement and aftermarket Mercury lower units can last many years. Using OEM or high-quality aftermarket units helps maximize durability and reliability.
6. Who can I contact for help selecting the right lower unit?
For any inquiries or assistance in selecting the correct Mercury lower unit, call our experts at 888-812-6287. We provide guidance to ensure you get the perfect unit for your boat.






































































































