1984-1986 Mercury Force 4HP Outboards Service Manual, Page 66Get this manual
3Install seals in gear housi ngAInstall driveshaft seal in housing, with spring out using seal nstaller (Special Tool NoT 2915) Figur 26 SEAL INSTALLER
FIgure 21Inalilng Cam to Shttt Rod
5Install front gear in housi ngFlgur21Installing Drlv.shaft SealBPlace O-ring in shift rod cavity grooveFigure