Mariner Impeller | Sierra 18-3069 Replacement impeller for various Mercury/Mariner 48, 55 and 60 HP model outboards. Sierra impeller For all Mariner 48/48W, 55/55W and 60 model outboards Replaces Mercury 47-81423M, 47-97108M, 879124 Replaces Yamaha 6H3-44352-00-00 Replaces Mallory 9-45602