Mercury - MerCruiser Bravo Two & Bravo Three 300 Hour Maintenance Kit Precision Sterndrive Service Kit Marine-Ready Components 8M0147075. Overview. There's a familiar comfort that comes from running a well-cared-for Bravo drive. Whether you're pushing a heavy cruiser onto plane or easing a big pontoon away from the dock, you can feel when everything beneath the transom is working exactly the way it should. That kind of trust doesn't just happen - it comes from putting in the maintenance that kee