Impeller Kit Replaces Yanmar 128176-42071 New Impeller Kit includes new impeller and gasket. Replaces Yanmar Impeller Numbers 128176-42070 , 128176-42071 , Sierra 18-8951 Gasket 128170-42090 , Sierra 18-56602 Fits Yanmar Marine Diesel Models: 1GM , 1GM10