Sierra International 18-1150 Needle Roller Bearing – Replacement For Mercury Marine Stern Drive (31-92366A1)

About This Product

Need a replacement needle roller bearing for your Mercruiser stern drive? This Sierra International part (number 18-1150) is the direct aftermarket equivalent for the Mercury Marine OEM part #31-92366A1. Sierra is a trusted brand in marine parts, so you're getting a quality bearing built to handle the demands of a boat's lower unit. It's made from corrosion-resistant stainless steel, which is crucial for the wet, harsh marine environment. The bore diameter is 1.125 inches. This bearing is a critical component in the drive assembly, ensuring smooth rotation and reducing friction. Installation requires some mechanical knowledge and proper tools – if you're not comfortable working on your stern drive, it's best left to a professional. But if you're doing the rebuild yourself, this is the exact bearing you'll need to get the job done right and get back on the water. Always compare the old bearing to the new one before installing to confirm the match.