Mercury Force 9.9, 15HP Outboards Service Manual, Page 206Get this manual
AS NEEDED
14Recheck reverse lock system Link must not touch swivel bracketReverse lock must lift up high enough to allow engine to tilt ("reverse" position)
Release lever must snap back to lock position when engine is tilted upReve rse lock must ca over lock bar when engine is tilted down inrunningposition
AS NEEDED
Install thermostat (1992 "8" models and newer)
15Reassemble motor leg
Install plastic seal (A)Press waterline (8) into plastic sleeve from bottom of motor leg, until waterline is ully inside motor leg with bottom waterl ine 1-1 8" (2B.S6mm) rom bottom edge of motor legInstall waterline spri ng (el in water inlet opening of motor leg(1984-1990 "A" models only) Press driveshaft seal (D) in bore of motor leg, using seal installer (Special Tool NoFT-2907)Install insert (E) in motor leg (1992 "8" models and newer with thermostat)