Mercury - 100 Hour Service Kit Alpha One Gen II Sterndrive OEM Components 8M0147055. Overview. Boaters who run Alpha One Gen II sterndrives know the feeling of dependability that comes from engines built to work season after season. Still, even the toughest systems need regular care to stay that way. The Mercury 8M0147055 100 Hour Service Kit brings together all the essentials you need to keep your Gen II drive running smooth, shifting clean, and staying protected from corrosion. It's the kind o