Description
Restore your stern drive’s propulsion with this Standard Rotation Lower Unit, a premium aftermarket replacement for Mercruiser Alpha One (Gen I), R, and MR models. Engineered for reliability in both freshwater and saltwater, this unit features a 13-spline drive shaft and precision-machined 13-21 tooth gears capable of handling high-torque applications up to 300HP. The heavy-duty housing and corrosion-resistant finish provide a durable, seamless fit to get your vessel back to peak performance levels.
Ideal Applications
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Freshwater Fishing & Cruising
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Coastal Saltwater Navigation
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High-Horsepower Runabouts






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