Impeller Kit Replaces Sierra 23-3314 Kohler 359978 New Impeller Kit contains impeller and o-ring Fits: Kohler pump GM28487 Replaces: Kohler 359978 , Sierra 23-3314 Fits models: 4EF , 4EFCD , 5E , 5ECD , 6EF , 6 EFCD , 7.3E , 7.3ECD