Impeller Johnson Evinrude | Sierra 18-3055 Johnson Evinrude Impeller | Sierra 18-3055 Sierra 18-3055 Johnson Evinrude Impelle Sierra 18-3055 Johnson Evinrude Impeller Diameter 2-3/4 in. Depth 1/2 in. 6 blade Material: neoprene Drive: 5/8 in. brass ding Replaces Johnson/Evinrude 389589, 777129 Replaces Mallory 9-45202