1999 EE Johnson Outboards 25, 35 3-Cylinder Service Manual, Page 186Get this manual
6Apply avIC Adhesive to the groove on the underside of the grommet Install grommet onto the impeller housing7Lightly oil pinion splines of the driveshaftSlide the driveshaft through the impeller housing and impeller until drive pin flat of the driveshaft is below the impeller
8Align drive cam flat with groove of the impellerInstall the impeller drive cam38630
rn driveshaft rotation Slide theisimpeller housingduring Sharp edge of the cam leading edge down
the driveshaftEngage the impeller with the cam
INote Verify that the impeller engages the impeller cam properlySerious powerhead damage will result if impeller cam is displaced