Mercury - 100 Hour Maintenance Kit Alpha One Sterndrive Series OEM Components 8M0147054. Overview. When you run an older MerCruiser sterndrive-one that has carried you through years of long weekends, early launches, and glass-calm sunsets-you come to appreciate the importance of proper upkeep. A good maintenance routine keeps those engines feeling familiar and trustworthy, the way a seasoned boat should. The Mercury 8M0147054 100 Hour Maintenance Kit delivers everything you need to give your Alp