The genuine Johnson neoprene flexible impeller is suitable for general water-pumping duties such as engine cooling, water transfer, wash down and bilge water pumping purposes. The Johnson flexible pump impeller is designed to be installed to some of the F75 range of Johnson Pumps which suits the impeller dimensions listed below, including: - F75B-9 pump models: 10-13141-01, 10-13141-02, 10-13142-01, 10-13142-02, 10-13153-01, 10-13170-01, 10-13265-01, 10-13286-01, 10-13306-01, 10-24413-01 & 10-24413-02 - MAN 51.06500-7023 & 51.06500-7034 pumps - Yanmar 119578-42501 pumps - Volvo Penta 3836563 pumps Johnson 09-821BT-1 replaces Volvo Penta 3825113 and Yanmar 119578-42551 impellers. The impeller fits the following engines: - Bayliner / Hino Motors W06D-T1-11 310/3000 - M.A.N. D2866LE/401, D2866LE/401, D2866LE/401 & D2866LE/401/402 - Volvo Penta TAMD63L-A & TAMD63P-A - Yanmar engines from 1997 onwards: 6LY2 & 6LY3 The Johnson flexible pump impeller has eight blades and is supplied complete with lubrication gel and instruction manual to aid installation of the impeller into the flexible impeller pump. It is highly recommended to make sure you use an original pump impeller for your flexible impeller pump as this will ensure that the quality complies with the performance and dimension requirements for each pump type. Johnson Pump impellers are manufactured in strict compliance with the pump specifications set by the engine manufacturers.