1988-1992 Mercury Force 5HP Outboards Service Manual, Page 194Get this manual
10Place shift rod coupling on shift rod Secure with spring pin (A) FINSTALLING GEAR HOUSING
12Coat upper splines of driveshaft with AntiSeize Lubricant (Special Tool NoT-2987-1)Pull lower shift rod (8) up as far as it will goApply bead of sealant (Special Tool NoT-8983) to gear housingT-8983 SEALANT