Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 482Get this manual
BIGFOOT GEAR HOUSING
ACAUTION
Do not use lubricant on top of drive shaftExcess lubricant, that is trapped in clear ance space, will not allow drive shaft to fully engage with crankshaftSubsequently, tightening the gear housing fasteners (while lubricant is on top of drive shaft) will load the drive shaftcrankshaft and damage either or both the power head and gear housingTop of drive shaft is to be wiped free of lubricant6Apply light coat of Quicksilver 2-4-C wfTeflon onto drive shaft splines7Apply light coat of Quicksilver2-4-C wfTeflon on gear case shift shaft splines and upper shift shaft splinesDo not use lubricant on ends of shift shafts8Install components as shown in appropriate photoALL EXCEPT 75 WMECHANICAL REVERSE LOCK