New OBR (Outboard Recycle) Mercury & Mariner Replacement Outboard Gearcases

This page offers a comprehensive selection of replacement OBR (Outboard Recycle) four-cylinder outboard gearcases for Mercury and Mariner engines. Choose new OBR gearcase options—each backed by a one-year limited factory warranty. Whether you need OEM-quality performance or cost-effective remanufactured solutions, we help you get back on the water fast. Explore our warranty information and shipping details, and rely on OBParts' decades of expertise.