1OE Number: The referencing OE number of this water pump impeller are 17018?0001, 17018 0001 P, 3583602, 3588476, 3593573, 3819486. 2Fitment: The water pump impeller is a replacement for Jabsco, please check the model of your inboard motor engine before ordering to confirm compatibility. 3Parameter: The water pump impeller adopts 8 blades design, with a outer diameter of 2.56in, inner diameter of 0.63in, and shaft depth of 2.99in, with spline drive. 4Function: This pump impeller is used in the cooling system of the inboard and provides higher flow and cooling flow, effectively protecting your engine. 5Installation: Lubrication with glycerol, silicone grease or dish soap (not included) during installation makes the installation smoother, perfect replacement for the old one.