Impeller | Sierra 18-3050 Sierra 18-3050 Johnson Evinrude Impeller Sierra 18-3050 Johnson Evinrude Impeller Diameter 1 1/2 in. Depth 3/4 in. 6 Blade Material: neoprene Drive: 1/2 in. brass ring Replaces Johnson/Evinrude 386084 Replaces Mercury 802332 Replaces Mallory 9-45201