New Mercury 200–400 HP L6 VERADO Outboard Lower Unit (2006–2021) – 1.85 HD & 1.75 HD Gear Ratios - New/Remanufactured image 0
New Mercury 200–400 HP L6 VERADO Outboard Lower Unit (2006–2021) – 1.85 HD & 1.75 HD Gear Ratios - New/Remanufactured image 0

Mercury Verado HD Lower Unit | 200–400 HP | 5.44″ Heavy-Duty

$6,939.00
$7,702.29
$6,939.00
(-10%)
Please hurry! Only 100 left in stock
Subtotal: $6,939.00
New Mercury 200–400 HP L6 VERADO Outboard Lower Unit (2006–2021) – 1.85 HD & 1.75 HD Gear Ratios - New/Remanufactured image 0

Mercury Verado HD Lower Unit | 200–400 HP | 5.44″ Heavy-Duty

$7,702.29 $6,939.00
New Mercury 200–400 HP L6 VERADO Outboard Lower Unit (2006–2021) – 1.85 HD & 1.75 HD Gear Ratios - New/Remanufactured image 0

Mercury Verado HD Lower Unit | 200–400 HP | 5.44″ Heavy-Duty

$7,702.29 $6,939.00
Product Type: New Lower Unit
HP/Shaft/Years/Ratio: 200-300 1.85 HD / L Shaft 2006-2021

    Power your offshore adventures with this Premium Aftermarket Replacement Heavy-Duty (HD) gearcase, specifically engineered for the high-output Mercury 2.6L Inline-6 Verado. Featuring the massive 5.44″ torpedo diameter, this unit is built to handle the immense torque and supercharged power of 200HP to 400HP engines. Whether you are running a heavy offshore center console or a high-speed performance hull, this HD unit provides the structural integrity and cooling capacity required for peak marine performance.

    • Heavy-Duty Architecture: Features the oversized 5.44″ housing for superior gear strength and durability.

    • Supercharged Ready: Optimized for the high-torque power curves of the L6 Verado platform.

    • Saltwater Protection: Advanced marine-grade coating ensures maximum corrosion resistance in demanding ocean conditions.

     

    • Brand: SEI
    • Part Number: SE90-221-HD
    • Engine Displacement: 2.6 Liter Inline-6 (Supercharged)
    • Horsepower Range: 200 HP – 400 HP
    • Gearcase Type: 5.44″ Heavy-Duty (HD)
    • Year Range: 2006–2021
    • Rotation: Standard (RH)
    • Condition: Brand New Aftermarket
    • Engine Type: Mercury Verado 200, 225, 250, 275, 300, 350, and 400 HP (6-Cylinder).
    • Year Range: Fits models manufactured between 2006 and 2021.
    • Shaft Lengths: Supports 20" (L), 25" (XL), and 30" (XXL) configurations.
    • Gear Ratios Available: * 1.85:1 HD: Optimized for 200–300 HP models.
    • 1.75:1 HD: Optimized for 300–400 HP models.
    • Torpedo Size Identification: This is the 5.44″ "Fat" Torpedo. It is NOT compatible with engines equipped with the standard 4.8″ gearcase unless you are performing a complete high-thrust conversion.
    • Ratio Selection: You MUST match your existing OEM gear ratio. Check your engine serial number or current gearcase stamping to ensure you select the correct 1.75 or 1.85 ratio.
    • Spline Count: Verify your vertical driveshaft tooth count (typically 20-spline for Verado) to ensure a perfect powerhead match.
    • Rotation: This listing is for Standard Rotation (RH). For twin-engine setups requiring Counter Rotation (LH), please contact us for the matching variant.

    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 ✔️ ❌

    Related Products

    Example product title
    From $6,129.00
    $6,803.19
    From $6,129.00
    (-10%)
    Example product title
    From $6,129.00
    $6,803.19
    From $6,129.00
    (-10%)
    Example product title
    From $6,129.00
    $6,803.19
    From $6,129.00
    (-10%)
    Example product title
    From $6,129.00
    $6,803.19
    From $6,129.00
    (-10%)
    Example product title
    From $6,129.00
    $6,803.19
    From $6,129.00
    (-10%)
    Example product title
    From $6,129.00
    $6,803.19
    From $6,129.00
    (-10%)
    Example product title
    From $6,129.00
    $6,803.19
    From $6,129.00
    (-10%)
    Example product title
    From $6,129.00
    $6,803.19
    From $6,129.00
    (-10%)
    Example product title
    From $6,129.00
    $6,803.19
    From $6,129.00
    (-10%)
    Example product title
    From $6,129.00
    $6,803.19
    From $6,129.00
    (-10%)

    Recently Viewed Products