Mercury & Mariner Outboard Upper Crankshaft Bearings

At OBParts, our Upper Crank Bearings for Mercury & Mariner outboard engines deliver precision-engineered, OEM-quality performance. Featuring trusted Red Rhino replacements including V6 late‑model upper main bearings, 3/4-cylinder variants, 3-cylinder options, and high‑power 3.0 L DFI bearings for 200–250 HP engines, you’ll find the exact fit for your motor’s specifications. All parts are in stock and ready to ship from our warehouse, backed by decades of expertise in marine parts and dedicated customer support.