The Sierra 18-5408 Rotor is interchangeable with the following: GLM 71110, Mallory 9-29221, Mercruiser 850485, 898253012, 850485-1, 850485, 8M0062084, 804424, OMC 3854311, Volvo Penta 3854311-2. Each Sierra product meets or exceeds the original equipment part it replaces. Composed of marine-grade components for optimal performance and reliability.