Brand New Mercury Mercruiser Alpha One Gen II Complete Sterndrive Assembly (Upper & Lower Unit, 1991-Current)

This is a brand new genuine Mercury complete sterndrive assembly for Mercruiser Alpha One Generation II, including both the upper driveshaft assembly (upper gearcase) and lower driveshaft assembly (lower gearcase/unit). Compatible with models from 1991 to present (serial numbers 0D494570 & higher). It includes a 1-year manufacturer warranty for peace of mind and comes complete with a water pump installed.

Available Gear Ratios: Please select your required gear ratio below:

• 1.47:1 – Commonly used with higher HP V8 engines (e.g., 5.7L/350 and up, 220+ HP models)
• 1.62:1 – Commonly used with 4.3L V6 or lower HP V8 engines in standard applications
• 1.81:1 – Commonly used with some 4.3L V6 models, especially in heavier boats
• 2.00:1 – Commonly used with 3.0L 4-cylinder engines (130-135 HP); this stronger ratio replaced the earlier 1.94:1 starting around 1998

Please note: This item is typically not stocked in-store and ships directly from the manufacturer for guaranteed freshness and quality.

Important Fitment Information: To ensure you receive the correct complete sterndrive with the proper gear ratio and full compatibility, please provide your sterndrive serial number and engine details (HP, cylinders, model/year) from the transom bracket. We're here to help verify the exact match!

Special Note: The yoke/input shaft design changed with Gen II models starting at serial number 0D494570. This complete assembly is specifically for Gen II and is not compatible with earlier Gen I ("R" style or pre-1991) without potential modifications.

If you have any questions, feel free to email us at jhawknz@gmail.com or call 615-691-1433. Our team is ready to assist with your purchase.

This complete sterndrive assembly comes ready for installation, with no core charge required.