New Mercury 200-250 HP DFI Counter Rotation V6 3.0L Outboard Lower Unit (2008–2018) – New / Re-manufactured image 0
New Mercury 200-250 HP DFI Counter Rotation V6 3.0L Outboard Lower Unit (2008–2018) – New / Re-manufactured image 0

Mercury Counter Rotation Lower Unit | SE90-221 | 200–250 HP V6 3.0L

$5,529.00
$6,137.19
$5,529.00
(-10%)
Please hurry! Only 100 left in stock
Subtotal: $5,529.00
New Mercury 200-250 HP DFI Counter Rotation V6 3.0L Outboard Lower Unit (2008–2018) – New / Re-manufactured image 0

Mercury Counter Rotation Lower Unit | SE90-221 | 200–250 HP V6 3.0L

$6,137.19 $5,529.00
New Mercury 200-250 HP DFI Counter Rotation V6 3.0L Outboard Lower Unit (2008–2018) – New / Re-manufactured image 0

Mercury Counter Rotation Lower Unit | SE90-221 | 200–250 HP V6 3.0L

$6,137.19 $5,529.00
Product Type: New Lower Unit
HP/Shaft/Years/Ratio: 200 DFI\,225\,250 C/R HP / XL Shaft 2008-2018

    Perfectly synchronize your twin-engine setup with this Premium Aftermarket Replacement counter-rotation gearcase. Specifically engineered for high-horsepower Mercury 3.0L V6 engines, this unit is built to handle the extreme torque of 200HP, 225HP, and 250HP DFI models. Designed for heavy-duty offshore use, it features reinforced internals and precision-cut gears to ensure smooth shifting and balanced thrust across your transom.

    • Twin-Engine Performance: Dedicated Counter Rotation (LH) design for precise handling and tracking in dual-engine configurations.

    • Heavy-Duty Power: Built to manage the massive output of 3.0L V6 powerheads.

    • Superior Durability: Advanced marine-grade finish provides maximum corrosion resistance in harsh saltwater environments.

     

    • Brand: SEI
    • Part Number: SE90-221 (Counter Rotation)
    • Engine Displacement: 3.0 Liter V6
    • Horsepower Range: 200 HP, 225 HP, 250 HP
    • Year Range: 2008–2018
    • Shaft Lengths: 25" (XL) / 30" (XXL)
    • Rotation: Counter Rotation (LH)
    • Condition: Brand New Aftermarket
    • Engine Type: Mercury V6 3.0L (200 HP DFI, 225 HP, 250 HP).
    • Rotation: Counter Rotation (Left Hand) only.
    • Year Range: Fits models manufactured between 2008 and 2018.
    • Shaft Lengths: Supports 25" (XL) and 30" (XXL) configurations.
    • Rotation Verification: This unit is for the port-side engine in a twin setup (Left Hand rotation). For standard right-hand rotation, please see the SE90-216 model.
    • Spline Count: Always verify your vertical driveshaft tooth count and length before ordering to ensure a perfect powerhead match.
    • Exclusions: Does NOT replace Torque Master, Torque Master 2, or Sport Master ("Fat Shaft") models.
    • Maintenance: To maintain your 3-Year Warranty, ensure the gearcase is filled with high-quality lube and follow the initial break-in period precisely.

    Mariners Warehouse vs Others

    Built to match OEM standards while delivering reliable performance and peace of mind.

    Features

    Mariners Warehouse

    Others
    Performance ✔️ ❌
    Warranty Support Reliable warranty Limited or unclear warranty terms
    Customer Trust Trusted by thousands of marine customers Unverified buyer trust
    Pre-tested before shipping for reliability ✔️ ❌
    OEM performance standards ✔️ ❌
    Simple return process ✔️ ❌

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