2004 SR Johnson 2 Stroke 9.9, 15, 25, 30 HP Outboards Service Manual, Page 269Get this manual
GEARCASE WATER PUMP Apply Adhesive to outside of water tube grommetInstall grommet and locate grommet bosses into holes of impeller housingSharp edge of the cam is leading edge during driveshaft rotationSlide the impeller housing down the driveshaftEngage the impeller with the cam
1Grommet
1Driveshaft rotation 2Drive cam
Apply Adhesive to the seal groove of the impeller housingInstall new seal into the groove
IMPORTANT: Confirm the impeller is oriented properly and engages the impeller cam properlySerious powerhead damage will result if impeller cam is displacedLightly coat both sides of new impeller plate gasket with Gasket Sealing CompoundPlace gasket on the gearcasePlace the impeller plate over the gasketSlide the driveshaft down into the gearcase and engage the pinionSeal