Quicksilver 5121400TP Alpha One Gen II Sterndrive 1.81 Ratio Standard Rotation

The Quicksilver 5121400TP is a complete Alpha One Generation II sterndrive assembly featuring a 1.81:1 gear ratio with standard (right-hand) rotation. This genuine Mercury Marine OEM sterndrive is engineered for boats with gasoline engines up to 300 horsepower or diesel engines up to 150 horsepower, and is designed for vessels capable of speeds up to 65 mph.

Key Features:

• 1.81:1 gear ratio for optimal power transfer and performance
• Standard right-hand rotation configuration
• Low-drag hydrodynamic torpedo design for improved fuel efficiency and boat performance
• Precision-shimmed spiral bevel gear sets in both upper and lower units
• Heat-treated stainless steel propshaft for durability
• Integrated water pump for simplified maintenance
• Permanently lubricated pivot points reduce maintenance requirements
• Tri-paint corrosion protection system (Irridite, EDP, and powder coating)
• Armored trim lines protect hydraulic system from debris
• Flo-Torq II hub compatibility
• 3-year limited corrosion warranty

This complete sterndrive assembly is compatible with MerCruiser Alpha One Gen II applications from 1991 to current. The unit is manufactured from corrosion-resistant XK 360 low-copper aluminum alloy and includes integrated speedometer pickup in the lower housing. Note that gimbal housing, trim cylinders, and propeller are sold separately. Maximum propeller diameter is 15 inches.