Mercruiser Alpha One Sterndrive - For more than 45 years the word "MerCruiser" has meant sterndrive performance. Choose from more than 20 unique drive systems such as our Alpha One, the most popular sterndrive in the world, or our brawny Bravo Series drives. MerCruiser has the perfect drive system for you and your boat.

Maximum Power Capacity300 HP (230 kW)
Lower Unit DesignLow-Drag Hydrodynamic Torpedo
Maximum Propeller Diameter15"
Water Inlet LocationStrut
Clutch TypeCompact Dog Clutch with F-N-R
Available Gear Ratios1.47, 1.62, 1.81, 2.00, 2.40:1
Counter-RotationOptional, Except 2.40:1 Ratio
Upper Unit Gear SetPrecision Shimmed, Spiral Bevel Gear
Lower Unit Gear SetPrecision Shimmed, Spiral Bevel Gear
Propshaft MaterialHeat-Treated Stainless Steel
Standard Exhaust OutletThrough Propeller
Propeller Hub TypeFlo-Torq II Hub
Recommended LubricantMercury High-Performance Gear Lube
Monitoring SystemEngine-Mounted Lube Monitor w/Audio Warning or Engine Guardian®
Corrosion Warranty3-Year, Limited
Housing ConstructionCorrosion Resistant XK 360 Aluminum Low-Copper Alloy
Corrosion ProtectionTri-Paint, Anodes & MerCathode® as a Kit
Anode TypeUltra-Pure Aluminum Anodes or Magnesium Anode Kit
Speedometer Pick-upIntegrated Into Lower Housing
Steering SystemSingle Cylinder Power Steering with Anti-Feedback
Steering Range56° Range Stop to Stop
U-Joint TypePermalube® Virtually Maintenance-Free
Power Trim SystemTwin-Cylinder Hydraulic Featuring Power Trim XD® Kick-up Return
Typical Trim Range5° to 15°
Trim Limit SwitchStandard - Adjustable
Trailer Limit53°
Trim Hinge Pin DesignPermanently Lubricated - No Maintenance Required
Hydraulic Trim LinesStainless Steel Braided Armor
Drive CouplerGreaseable From Inside Boat
Drive Weight85 lbs. (38 kg)


Specification

Horse Power (hp)
  • 300

Engine 1

Engine Make Mercruiser
Horse Power 431
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