Sierra 18-3047 Impeller - Neoprene Sierra Impeller Meets or exceeds the original equipment quality Sierra part number: 18-3047 Interchangeable with the following: GLM 89621, Jabsco 18948-0001, Mallory 9-45706, Sherwood 10615K, Volvo Penta 835874 Fit specific, check part numbers to ensure proper fit