This fits the 1997 and newer European made Yanmar models with the 3" (76mm) cover that use an o-ring. ( If your model uses a gasket this is NOT the correct kit ). Fits the following Yanmar Models: 2YM15, 3YM20, 3YM30, and some GM models Fits Yanmar Pumps: 128990-42500 , 128990-42510 , 128377-42500 , 128397-42500 Fits Johnson Pumps: 10-24509-01 , 10-24509-02 , 10-13337-01 , 10-13492-01 This kit with a new assembled shaft is great for people that do not have a press, or want to repair the pump at sea. Contains Aftermarket Parts. Includes: IMPELLER, 128990-42200 , old # X08810B COVER O-RING, X02173476 , old # X0506597 , early models used X0506523 SLINGER O-RING, X02173432 , old # X0506513 RETAINING RING, X00370012 , old # X0534501 RETAINING RING, X00371732 , old # X0534511 SPACER PLATE, X0145050 BEARING, X03431760 , old # X0508124 BEARING, X03431748 , old # X0508130 SS SCREWS, X0504163 Replaces 128377-42520 LIP SEAL, X02233010 , old # X0529139 END COVER, X0142398 SHAFT, 01-46541 ,nut ,nut ,washer (2). Impeller Specifications: Diameter: 50.8mm (2") Width: 22mm (0.87") Shaft: 12mm (0.47") Pin Drive 6 Blades 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