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Tech Articles > Mercruiser Product Specifications > Mercruiser Alpha Sterndrive Specifications
| Maximum Power Capacity |
300 HP (230 kW) |
| Lower Unit Design |
Low-Drag Hydrodynamic Torpedo |
| Maximum Propeller Diameter |
15" |
| Water Inlet Location |
Strut |
| Clutch Type |
Compact Dog Clutch with F-N-R |
| Available Gear Ratios |
1.47, 1.62, 1.81, 2.00, 2.40:1 |
| Counter-Rotation |
Optional, Except 2.40:1 Ratio |
| Upper Unit Gear Set |
Precision Shimmed, Spiral Bevel Gear |
| Lower Unit Gear Set |
Precision Shimmed, Spiral Bevel Gear |
| Propshaft Material |
Heat-Treated Stainless Steel |
| Standard Exhaust Outlet |
Through Propeller |
| Propeller Hub Type |
Flo-Torq II Hub |
| Recommended Lubricant |
Mercury High-Performance Gear Lube |
| Monitoring System |
Engine-Mounted Lube Monitor w/Audio Warning or Engine Guardian® |
| Corrosion Warranty |
3-Year, Limited |
| Housing Construction |
Corrosion Resistant XK 360 Aluminum Low-Copper Alloy |
| Corrosion Protection |
Tri-Paint, Anodes & MerCathode® as a Kit |
| Anode Type |
Ultra-Pure Aluminum Anodes or Magnesium Anode Kit |
| Speedometer Pick-up |
Integrated Into Lower Housing |
| Steering System |
Single Cylinder Power Steering with Anti-Feedback |
| Steering Range |
56° Range Stop to Stop |
| U-Joint Type |
Permalube® Virtually Maintenance-Free |
| Power Trim System |
Twin-Cylinder Hydraulic Featuring Power Trim XD® Kick-up Return |
| Typical Trim Range |
5° to 15° |
| Trim Limit Switch |
Standard - Adjustable |
| Trailer Limit |
53° |
| Trim Hinge Pin Design |
Permanently Lubricated - No Maintenance Required |
| Hydraulic Trim Lines |
Stainless Steel Braided Armor |
| Drive Coupler |
Greaseable From Inside Boat |
| Drive Weight |
85 lbs. (38 kg) |
