Impeller and O-ring Kit This fits a 6 bolt cover with a 3" (76mm) diameter. Replaces: Impeller Numbers X08810B , X08810B-01 , 128990-42200 O-ring Numbers X02173476 , X0506597-01 128990-42200 water pump impeller (has drive pin that fits slotted shaft All YM and some GM series engines 2YM15 2004 & up 3YM20 2004 & up 3YM27A 2004 & up 3YM30 2004 & up 3YM30R 2004 & up Fits all 2GM20/3GM30 YEU series. The GM YEU series are European built models from 1997-2004 and have the letter "E" prefixing the engine serial number (example serial no. E00123) All models below. 2GM20-YEU , 1997 and later 2GM20C-YEU , 1997 and later 2GM20F-YEU , 1997 and later 2GM20FC-YEU , 1997 and later 3GM30-YEU , 1997 and later 3GM30C-YEU , 1997 and later 3GM30F-YEU , 1997 and later 3GM30FC-YEU , 1997 and later Fits Yanmar Pumps: 128377-42500 , 128397-42500 Johnson Pumps: 10-24509-01 , 10-24509-02 Diameter: 50.8mm (2") Width: 22mm (0.87") Shaft: 12mm (0.47") 6 Blades