1984-1986 Mercury Force 4HP Outboards Service Manual, Page 58Get this manual
RemovalWARNING
Thread self-tapping screw or bolt into the shift shaft seal
Disconnect and ground spark plug lead 10 prevent accidental starting of motor1Remove propeller2Remove shift coupling cover from motor leg and loosen shift coupler screwFigure 3
BTap out shift seal using 18" diameter punch Figure 4
Figure 4Removing Shift Rod '
4Clean pump body and backplate in solventAgur3Loo nlng Shift Coupling3Remove screws securing gear housing 10 motor leg4Pull gear housing from motor leg 5Remove screws securing water pump plate to body; remove plate6Pull driveshaft with impeller from housing and slide impeller from shaft7Remove spring pin securing gear shift rod to coupling8Remove the stud using the nut, which secures the pump body to gear housing, remove body by sl iding up and off gear shift rod9Plug openings to keep dirt from entering gearWater PumpIn.pectlon and RepelrReplacement parts for Ihe water pump are available individually or in kit formThe water pump kit includes new body assemblywater line sealimpeller, pin, and backplate1Inspect water pump impeller and replace if vanes are damaged or worn excessively2Inspect pump body and water pump backplate for wear andor pitting; replace if excessive3Remove shift rod seal56 5Inspect water tine seai