Mercury - 100 Hour Maintenance Kit Bravo One Sterndrive OEM Components 8M0147056. Overview. Anyone running a Bravo One sterndrive knows it's built for serious water time-long runs, quick jumps on plane, and the kind of steady confidence that makes each trip feel effortless. But even the strongest systems need regular care. The Mercury 8M0147056 Bravo One 100 Hour Maintenance Kit brings that peace of mind back into the routine. Everything you need comes in one tidy package, ready to help you keep