Water pump impeller for Volvo Penta 3.0 4.3 5.0 5.7 8.1 V6 V8 engines. Johnson F6B-9 09-812B and Indmar New Impeller used by Volvo Penta, OMC, Indmar, Yamaha, Jabsco, Johnson and many other brands. Includes O-ring and gasket depending on your application Width 1-15/16 . Diameter 2-1/4" . 5/8 shaft 12 spline Interchanges with: Johnson 09-812B-1, F6B-P pumps, Yanmar 119773-42600, Sierra 18-3306, Indmar S685007 ( 320HP, 325HP, 330HP, 335HP, 340HP & 350HP), Volvo Penta OMC part numbers 3588914, 3584350, 21213664, 3593660, 2123664 & 3841696 Recommended to replace annually. Coat with dish soap before installing If purchasing for Volvo Penta, it only fits the pumps with LONG screws used on 2005 and newer boats. Please see picture. Please note, prior to 2005 Volvo Penta used a shorter impeller on some applications. Please check your part number or size. Thank you