2003 Johnson ST 55 HP WRL 2 Stroke Commercial Service Manual, PN 5005483, Page 179Get this manual
GEARCASE
WATER PUMP
ler into the liner with slot for impeller cam facing outRun thin bead of Adhesive sealant in the seal groove, and install the special shaped O-ring sealimpeller, and slide water pump down over camBe sure impeller cam does not fall out of position
12Sharp edge of drive cam Direction of driveshaft rotation
1Impeller 2O-ring seal
IMPORTANT: Verify the impeller engages the impeller cam properlySerious powerhead damage will result if impeller cam is displacedInstall the water tube grommet on the impeller housing
Apply Gasket Sealing Compound to both sides of new impeller plate gasketInstall the gasket and impeller plateApply Triple-Guard grease or Adhesive to temporarily hold drive cam in place1