Mercury-Mercruiser 5-5121400TP Alpha 1 Gen 2 1.81 Ratio Sterndrive

Mercury Alpha One Gen II Complete Sterndrive – 1.81 Ratio, Standard Rotation

Mercury part number 5-5121400TP is a complete new Genuine Mercury OEM Alpha One Generation II sterndrive with a 1.81 gear ratio and standard right-hand rotation.

Drive Specifications

• Mercury part number: 5-5121400TP
• Drive model: Alpha One Gen II
• Gear ratio: 1.81
• Rotation: Standard right-hand (RH)
• Condition: New Genuine Mercury OEM
• Warranty: 1-year Mercury factory warranty

This Complete Assembled Sterndrive Includes:

• Upper gear housing assembly
• Lower gear housing assembly
• Yoke and universal joint assembly
• Integrated seawater pump
• Mounting gasket and hardware
• Installation hardware
• Drive mounting gasket
• Speedometer connector, part number 860382A1
• 16 oz bottle of Mercury High Performance Gear Lube

Not Included:

• Propeller
• Transom or gimbal housing assembly
• Trim cylinders

Alpha One Gen II Applications

Alpha One Gen II sterndrives are designed for boats capable of speeds up to 65 MPH and are commonly used with gasoline engines producing up to 300 HP and diesel engines producing up to 150 HP.

The efficient hydrodynamic profile helps reduce drag, while the integrated seawater pump and permanently lubricated pivot points help simplify routine maintenance.