Impeller and gasket Kit This uses a 6 bolt cover with a 2-3/4" (70mm) diameter. 124223-42092 water pump impeller (has keyway groove to fit shaft drive key) fits all Japanese built fresh water cooled 2/3GMF's, 2GM20F's 3GM30F's up to 2005, all 3HM's & 2QM20 Will not fit 1997 and later European made. ( the serial number will start with E) Replaces: Yanmar Impeller Numbers 128296-42070 , 124223-42091 , 124223-42092 Gasket 124223-42110 Sierra 18-8950 Fits the following Yanmar Marine engines: 2GMF , 3GMF , 3GMDF , 1980-83 2GM20F , 3GM30F , 1983-2005 freshwater cooled (antifreeze) models made in Japan. Will not fit 1997 and later European made. ( the serial number will start with E on the European models) 3HM , 3HMF , 1980-83 3HM35 , 3HM35F , 1983-1992 Diameter: 50.8mm (2") Width: 22.1mm (7/8") Shaft: 12.7mm (1/2") 6 Blades