Mercury - 100 Hour Maintenance Kit MerCruiser 3.0L MPI Sterndrive Complete Service Components 8M0147049. Overview. There's a certain comfort in knowing your boat is ready the moment you turn the key. No hesitation, no doubts - just a smooth start and the steady push of a well-maintained engine. For owners of MerCruiser 3.0L MPI sterndrives, the Mercury 8M0147049 100 Hour Maintenance Kit brings that peace of mind back to the forefront. It bundles every essential filter and seal into one simple, d