New & Remanufactured Mercury & Mariner Replacement Outboard Gearcases 

This page features a comprehensive range of New and Remanufactured Mercury & Mariner Outboard Gearcases (Lower Units) and related parts for Mercury and Mariner outboard engines. Whether you're looking for new OBR gearcases, remanufactured OBR gearcases, or new aftermarket SEI gearcases, we've got you covered. Additionally, explore our selection of gearcase rebuild kits and individual gearcase components—ranging from seal kits and drive shafts to water pump kits and bearing carriers. Each product is sourced from trusted manufacturers and designed to ensure optimal performance and reliability for marine applications.