Mercury - 100 Hour Maintenance Kit MerCruiser 2.5L & 3.0L Sterndrive Complete Service Components 8M0147048. Overview. Most boat owners will tell you that a good day on the water starts long before you leave the dock. It begins with the confidence that your engine is ready for whatever the day brings - long no-wake zones, sudden swells, or a full afternoon of cruising with the family. The Mercury 8M0147048 100 Hour Maintenance Kit gives you that peace of mind. It bundles the essential service com