Saa-Doo Spark GENUINE Replacement Impeller Shaft 267000581 which is pressed into the bearing within the jet pump.  
2014-2021 All Spark models
Williams Jet Rib 60 and 90 hp 0461270

We also keep in stock the required seal kits to suit along with bearings

Sea-Doo Spark Pump Shaft

SKU: 267000581