1995 Johnson/Evinrude Outboards 25, 35 3-Cylinder Service Manual, Page 194Get this manual
6Apply OtIC Adhesive Mto 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 impeller8Align drive cam flat with groove of the impellerInstall the impeller drive camSharp edge of the cam is leading edge during driveshaft rotation Slide the impeller housing down the driveshaftEngage the impeller with the cam