Chrysler 70, 75 and 85 HP Outboard Motors Service Manual OB 3438, Page 180Get this manual
FEElER GAUGE HERE PLUG
Figure 30Installing Master Shim
Figure 31Installing Shimming Plug Cradle
3Thread pinion nut on end of driveshaftPlace foot pound torque wrench with proper socket over pinion nut, and spline adapter (Special Tool NoT 7848) over end of driveshaftTorque nut to 85 ftIbs(11 .72 kgm)
CWith feeler gauge in placepush down very hard on driveshaft and try to remove feeler gauge If feeler gauge is tight between pinion gear face and shimming plugrelease force, remove feeler gauge and select thinner blade DInsert blade(s) and repeat processKeep doing this until you find blade thickness which can be pulled out freely when pressure is applied on the driveshaft
CAUTION
Be sure socket is positioned properly over nutIf socket slips off nut during torquing it may round off edges of nut and make nut impossible to remove or tighten4Place shimming plug (Special Tool No 8997A) in forward gearFigure 31Rotate plug so that flat portion is facing up towards pinion gearInstall aluminum plug cradle between plug and bottom of gear housingFigure 31 5Determine correct spacing for shims as followsAPull up on driveshaft to give maximum clearance between face of pinion gear and large diameter ring of shimming plug BInsert thickest blade of feeler gauge (preferably .035 or thicker) between bottom surface of pinion gear and large 0.0 of shimming plug