Complete Sterndrive | SE104 | 1.81 Ratio | Short Yoke

Complete Sterndrive | SE104 | 1.81 Ratio | Short Yoke

$1,935.00
$2,147.85
$1,935.00
(-10%)
SKU: ST-GEN-I-1_81-COMPLETE-SHORT-YOKE
Key Features :
  • Heavy-Duty Gear Construction
  • Precision OEM-Level Fitment
  • Saltwater Resistant Finish
Please hurry! Only 20 left in stock
Subtotal: $1,935.00
Complete Sterndrive | SE104 | 1.81 Ratio | Short Yoke

Complete Sterndrive | SE104 | 1.81 Ratio | Short Yoke

$2,147.85 $1,935.00
Complete Sterndrive | SE104 | 1.81 Ratio | Short Yoke

Complete Sterndrive | SE104 | 1.81 Ratio | Short Yoke

$2,147.85 $1,935.00

    Restore peak propulsion and mechanical efficiency with this Complete Sterndrive Assembly, a premium aftermarket replacement for Mercruiser Alpha One (Gen I) systems. Engineered with a 1.81 gear ratio, this unit is optimized for 170HP to 185HP applications, providing smooth power transmission and reduced vibration. The assembly features a Short Yoke (8-1/8" input shaft) and heavy-duty internal gearing housed in a corrosion-resistant casing, ensuring long-term durability in both freshwater and saltwater environments.

    Ideal Applications

    • Recreational Lake Cruising

    • Small to Mid-Sized Fishing Vessels

    • Freshwater and Saltwater Navigation

    • Brand: SEI
    • Part Number: GEN-I-1_81-COMPLETE-SHORT-YOKE
    • OEM / Cross-Reference: SE104, 90-104-02
    • Engine Compatibility: Mercruiser Alpha One (Gen I) / 170-185HP
    • Year Range: 1976–1982
    • Gear Ratio: 1.81:1
    • Input Yoke: 8-1/8" (Short Style)
    • Rotation: Standard (Right Hand)
    • Horsepower Rating: Up to 300HP
    • Drive Type: Complete Sterndrive (Upper & Lower)
    • Fits Mercruiser Alpha One (Gen I), R, and MR models (1976–1982)
    • Optimized for 170HP and 185HP engine configurations
    • Equipped with a 1.81 Gear Ratio
    • Features an 8-1/8" Short Input Yoke
    • Verify Yoke Length: Specifically fits models requiring the 8-1/8" short yoke; will not fit long-yoke applications.
    • Check Drive Generation: Compatible with Gen I only; does not fit Alpha One Gen II (1991–Present) units.
    • Rotation Confirmation: Designed for Standard Rotation (Right Hand) operation only.

    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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