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Alpha One Drives
The Alpha® sterndrive earned the title of “world’s most popular sterndrive” because it delivers reliable performance in a value package. Reliable performance means more family fun year after year without missing a beat. Alpha drives slice through the water with an efficient hydrodynamic profile producing very little drag. And because of the Alpha drive’s many maintenance-free features – you’ll enjoy a worry-free ownership experience.
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Alpha One Drive |
| 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) |
Features
Alpha Drive One
Reliability
- Spiral-cut steel bevel gears for quiet operation and durability
- XK 360 low copper alloy for corrosion resistance
- Tri-Paint System (Irridite, EDP & Powder Paint) creates a tough, durable corrosion resistant barrier
- Armored trim lines protect hydraulic system from debris
- Flow-Torq II Propeller Hub - The "Weekend Saver" protects the entire drive from damage, not just the lower unit
Performance
- Hydrodynamic lower unit produces little drag to slice through the water efficiently
- Trim limit switch sets drive angle for maximum performance every time
- Through-Prop exhaust maximizes power and reduces noise levels
- Wide range of 3-, 4-, and 5-blade propellers available in aluminum and stainless steel to maximize pulling power and top speed for any application
Easy Ownership
- Drive Lube Monitor Alarm warns if drive lube is low. Engine mounting allows easy inspection and fill without the cost to pull a boat from the water.
- Permalube® U-Joint Virtually no maintenance required
- Maintenance Free Hinge Pins No added cost to pull a boat from the water
- Greaseable Drive Coupler No added cost to pull a boat from the water
- New permanently lubricated gimbal bearing does not require maintenance
Technology
- Power Trim XD® Automatically Returns the Drive to the Water to Maintain Full Control of Boat in Case of an Emergency
- MerCathode® kit monitors the galvanic potential of the drive and counteracts corrosion with a metered electrical charge providing continuous cathodic protection
- Engine Guardian System® with MPI engines protects the drive from damage from low lubricant levels
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