1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 322Get this manual
BIG FOOT
Bearing CarrierPropeller Shaft Installation
1Apply small amount of 2-4-C wTeflon between lips of propeller shaft oil sealsApply 2-4-C wTeflon to threads, O-ring groove and pilot diameter2Slide reverse gear into bearing carrier assemblySlide bearing carrier assembly over propeller shaft and thread it into propeller shaft cavity as-far-as possible by hand (LEFT HAND THREAD)3Torque bearing carrier using Special Tool 91-938431Torque to 80 lb-ft (108.5 Nm)