StayCoolPumps Impeller Kit Replaces Yanmar 119574-42552 New Impeller Kit Includes Impeller 119574-42552 old #'s 119574-42550 , 119574-42550-01 and o-rings Fits Pumps: 119574-42500 , 119578-42501 , 10-13170 Yanmar models: 6LY2-STE , 6LY2-STP , 6LY2A-STE , 6LY2A-STP , 6LYA-STE , 6LYA-STP , 6LYA-UTE , 6LYA-UTP , 6LY3-ETP , 6LY3-STP , 6LY3-UTP , 6LY3-STC 6LY3-UTC One side of the impeller is threaded for use with puller