1996 Mercury Force 25 HP Service Manual 90-830894 895, Page 91Get this manual
Water pump Removal 1Remove gear housing
NOTE: Replace impeller if:Impeller blades are cracked, torn or worn- Impeller is glazed or melted (caused by insufficient water supplyRubber portion of impeller is not bonded to impeller hub
Cleaning Inspection and Reassembly
1Inspect stainless steel face plate, water pump cover insert and fiber washersReplace any of these parts that are not in good serviceable conditionaWater Pump Mounting Screws
2Thoroughly clean face plate gasket from gear housing and face plate3Slide new face plate gasket and face plate over driveshaft and position them on gear housing4Install washer over driveshaft and set it flat against face plate
2Remove four screws (a) securing water pump to gear housing as shown in illustration3Slide water pump up and off driveshaft housingaWasherFace PlateDrive Key
5Place impeller drive key on flat of driveshaft6Slide impeller over driveshaftAlign impeller keyway with drive key, then push impeller over drive key and against face plate7Install washer and set it flat against impelleraWater Pump HousingInsertO-RingWasherImpellerImpeller Drive KeyWasherFace Plate i-Gasket