2002/2003 Johnson SN/ST 2 Stroke 3.5, 6 8 HP Outboards Service Manual, PN 5005466, Page 191Get this manual
GEARCASE WATER PUMP
WATER PUMP
Disassembly3.5
Remove gearcase from exhaust housing as described in REMOVAL AND INSTALLATIONRemove driveshaft tube and coupler
Then remove the impeller drive key, gasket(s), and impeller plate1
12Drive key Plate
22270 22284
Disassembly68
001237 25467
Remove gearcase from exhaust housing as described in REMOVAL AND INSTALLATIONRemove the four water pump housing screwsRemove the impeller housing and impeller by sliding them up and off the drives haft