Mercury and Mariner Outboard Gearcases and Parts

Discover our extensive selection of Mercury and Mariner outboard gearcases & replacement components at ObParts, your trusted resource for outboard parts. Choose from complete gearcase assemblies from OBR, SEI, & OEM alternatives—All designed to match OEM engine specifications. Or, explore our gearcase rebuild kits for cost-effective repairs, or source essential components such as water-pump kits, impellers, skegs, anodes, seal and bearing sets, gear housing parts, drive shafts, gear sets, prop shafts, clutch dog, and more.