Mercury Outboard Lower Unit Replacement – Fits 2.0L, 2.4L & 2.5L – 1.87 & 2.00 Ratio – Standard Rotation – SE206

Restore Power & Performance to Your Mercury Outboard

If your current lower unit is worn out, noisy, or failing under load, it’s time for a dependable replacement. The SE206 lower unit is engineered to bring your Mercury outboard back to life with smooth shifting, efficient power transfer, and long-term reliability.

Built for Performance & Reliability

Designed specifically for Mercury 2.0L, 2.4L, and 2.5L engines, this aftermarket lower unit delivers OEM-level performance without the high cost. Whether you're cruising, fishing, or running at higher speeds, it ensures consistent and dependable operation.

 Who Is This For?

• Boat owners replacing damaged or worn lower units

• Marine technicians looking for reliable aftermarket solutions

• Performance users needing stable gear ratios

• Anyone running Mercury 2.0L–2.5L outboards

Why Choose This Lower Unit?

• Precision-engineered for Mercury engines

• Strong aluminum housing for corrosion resistance

• Smooth gear engagement under load

• Cost-effective alternative to OEM units

• Built for long-term marine durability

 Key Features

• Compatible with Mercury 2.0L, 2.4L, and 2.5L engines

• Available in 1.87:1 and 2.00:1 gear ratios

• Supports standard rotation configurations

• Shaft lengths available in 20" and 25"

• 4-3/4" bullet diameter gear case design

• Direct bolt-on replacement for easy installation

Technical Specifications

 Compatibility Notes

• Replaces most Mercury 2.0L, 2.4L, and 2.5L lower units

• Ensure correct gear ratio and shaft length before ordering

• Check engine serial number for exact fitment

• Suitable for standard rotation setups only

 Variant Explanation

• 1.87 Ratio / 20" Shaft → Ideal for balanced speed and torque in mid-size setups

• 1.87 Ratio / 25" Shaft → Best for deeper transoms or larger boats

• 2.00 Ratio / 20" Shaft → Better torque for heavier loads

• 2.00 Ratio / 25" Shaft → Maximum thrust with extended shaft length

What’s Included

• Complete lower unit assembly

• Pre-assembled gear case

• Ready-to-install configuration

Important Notes / Disclaimer

• Professional installation is recommended

• Always verify compatibility before purchase

• Not intended for unsupported or modified setups