1988 Johnson Evinrude "CC" 9.9 thru 30 Service Manual, P/N 507660, Page 252Get this manual
COA3245
Water Pump Servicing20, 25, 30
Disassembly 1Remove gearcase assembly as described in Gearcase Servicing, this Section
BJ 2Remove the six impeller housing screws and washers 3Pull up on the driveshaft and remove the driveshaft with the water pump assembly from the gearcaseRemove the water pump assembly from the driveshaft4Remove the impeller plate and gasketDiscard the gasket5Scrape all gasket material from the plate and gearcase6Remove the water tube grommet and O-rings from the impeller housing Inspect all components for excessive wearAssembly
COA3246
1and install the shift rod bushing housing
into the impeller