1998 Johnson Evinrude EC 50 thru 70 HP 3-Cylinder Service Manual, Page 208Get this manual
Installation
1Apply OMC Gasket Sealing Compound to both sides of new impeller plate gasket Install the gasket and impeller plate Place the impeller O-ring onto the driveshaft and slide it into place on top of the impeller plate2Apply OMC Needle Bearing Assembly Grease to flat area of the driveshaftInstall the drive cam The sharp edge Q) of the cam is the leading edge during driveshaft rotation 9415
3Slide the water pump assembly down the driveshaftAlign impeller housing with the gearcaseRotate 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