1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 192Get this manual
Disassem blyAssem bly r:;l 1Start by removing all of the parts from the housing, inspect the housing for cracks or melting and then install new top plate The top plate locks in place in the housing with square index tab
'4l 2The liner now slides in and mates with the plate at the point
L!:J where the liner is split3Place the water tube grommet in the impeller housing '6l Apply thin bead of OMC Adhesive to groove of the impeller housing grommetPlace the grommet in position on the impeller housingr]l 5Lightly coat the liner with oilWith counterclockwise rotation, install the impeller into the liner with slot for impeller cam facing outr]l 6Run thin bead of OMC Adhesive cement in the seal groove and then install the specially shaped O-ring sealInstallation 1Apply OMC Adhesive to the impeller plate area of the gearcase1al 2Apply OMC Needle Bearing Assembly Grease to flat area of the driveshaftInstall the drive camThe sharp edge of the cam is leading edge during drives haft rotation 3Slide the water pump assembly down the driveshaftAlign impeller housing with the gearcase Rotate the driveshaft to engage the impeller cam with the impeller and slide water pump assembly down over impellerBe sure impeller cam does not fall out of position