Chrysler 100, 115 and 140 HP Outboard Motors Service Manual, OB 3439, Page 184Get this manual
FEELER GAUGE HERE PLUG
Figure 30Installing Master Shim3Thread pinion nut on end of driveshaft Place foot pound torque wrench with proper socket over pinion nutand spline adapter (Special Tool NoT 7848) over end of driveshaftTorque nut to 85 ftIbs(11 .72 kgm)
Figure 31Installing Shimming Plug CradleC With feeler gauge in placepush down very hard on driveshaft and try to remove feeler gaugeIf feeler gauge is tight between pinion gear face and shimming plug, release forceremove feeler gauge and select thinner blade Dlnsert lade(s) and repeat process Keep doing this until you find blade thickness which can be pulled out free ly when pressure is appli ed on th 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 tighten 4Place shimming plug (Special Tool NoT 8997A) in forward gearFigure 31 Rotate plug so that flat portion is facing up towards pinion gearInstall aluminum plug crad le between plug and bottom of gear housing Figure 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 of shimming plug