The Tohatsu Parts Bevel Gear B with the part number 3C8-64020-2 is compatible with Mercury/Mariner 43-16138004. This bevel gear is a crucial component in the engine's power transmission system, responsible for transferring power from the engine to the propeller. It is made of high-quality materials to ensure durability and longevity, and is designed to fit perfectly with the engine's existing components. This bevel gear is an essential replacement part for any boat owner who wants to maintain the performance and reliability of their engine. With the Tohatsu Parts Bevel Gear B, boat owners can be confident that their engine will operate smoothly and efficiently, even in the toughest conditions.