SE306 V6 Lower Unit | 90-306-B | Johnson Evinrude 1.83:1

SE306 V6 Lower Unit | 90-306-B | Johnson Evinrude 1.83:1

$1,195.00
$1,326.45
$1,195.00
(-10%)
SKU: SE90-306-B
Key Features :

Ocean Pro Style Water Intakes

Heavy-Duty 4-3/4" Bullet Diameter

Backed By 3-Year Fault-Free Warranty

Please hurry! Only 99 left in stock
Subtotal: $1,195.00
SE306 V6 Lower Unit | 90-306-B | Johnson Evinrude 1.83:1

SE306 V6 Lower Unit | 90-306-B | Johnson Evinrude 1.83:1

$1,326.45 $1,195.00
SE306 V6 Lower Unit | 90-306-B | Johnson Evinrude 1.83:1

SE306 V6 Lower Unit | 90-306-B | Johnson Evinrude 1.83:1

$1,326.45 $1,195.00

    Is a damaged gearcase keeping your V6 outboard off the water? Restore your engine's reliability with this Premium Aftermarket Replacement lower unit. Engineered with a heavy-duty 4-3/4" bullet diameter and high-flow Ocean Pro style water intakes, this gearcase delivers optimal cooling and consistent power transfer for your Johnson or Evinrude.

    • Offshore Cruising: Robust construction handles the sustained torque of deep-water navigation.

    • Repower Projects: The perfect direct-fit upgrade for bringing aging 1979+ V6 outboards back to life.

    • Brand: SEI
    • Part Number: SE306 (90-306-B)
    • Cross-Reference/OEM: Premium Aftermarket Replacement for Johnson/Evinrude V6
    • Engine Compatibility: Johnson/Evinrude V6 (135HP - 250HP)
    • Year Range: 1979–2001+
    • Gear Ratio: 1.83:1
    • Physical Specs: 4-3/4" Bullet Diameter, Painted Black, Ocean Pro Intakes
    • Fits Johnson/Evinrude V6 outboards (135HP–250HP) from 1979 and newer.
    • Engineered specifically for motors requiring a 1.83:1 Gear Ratio.
    • Thrust Washer Upgrade: You MUST use a 1991 or newer prop thrust washer (Use SEI #98-306-40 for 3-blade OMC props, or OEM #0126869 for 4-blade props).
    • Incompatible Models: Will NOT replace Magnum or Lightning cases, and does not fit units older than 1978.
    • Shaft Configuration: Does NOT include the upper driveshaft. You must verify your Shaft Length (e.g., 20" or 25") and Spline Count. You must use the newer style upper driveshaft with a retaining clip (if your old unit has a one-piece shaft, an upgrade is required).
    • Missing Components: This unit ships without a water pump or shift shaft. You will need to install and adjust your existing shift shaft.

    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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