Mercury - 100 Hour Maintenance Kit MerCruiser 4.3L V6 Sterndrive Complete Service Components 8M0147050. OverviewEvery boater knows the kind of quiet confidence that comes from an engine that starts smoothly and runs strong, season after season. It is not luck - it is maintenance done right. With the Mercury 8M0147050 100 Hour Maintenance Kit, you get everything you need to keep your MerCruiser 4.3L V6 sterndrive performing at its best, all in one neatly packaged, easy-to-use kit. No guesswork. N