Mercury - Quicksilver 815565 Bearing Carrier Oil Seal Mercury & Mariner 150-300HP Outboards Bravo I XR/XZ Sterndrives 815565. Overview. Keeping water out and oil in - that's the quiet job of the Quicksilver 815565 Bearing Carrier Oil Seal, and it's one that makes a big difference in how long your outboard or sterndrive lasts. This OEM seal fits Mercury and Mariner 2-stroke and 4-stroke outboards from 150-300 horsepower, as well as MerCruiser Bravo I XR and XZ sterndrives.. It's built for the har