1985 OMC 65, 100 and 155 HP Models Commercial Service Manual, PN 507450-D, Page 298Get this manual
8Hold the gauge against base pins and firmly against bearing housing between mounting holesUsing feeler gaugemeasure the clearance between gauge and pinion 9Subtract the measurement from 0,508 mm (0.020") to determine correct shim thicknessUse micrometer to check shim thicknessDo not use more than four shims to obtain the correct thicknessAvoid the use of 0,05 mm (0.002") shims unless absolutely necessary10Remove the driveshaft from the tool baseRemove the collar and bearing housing from the driveshaft and add the required shims11 Check correct shimming by reassembling the driveshaft with shims and placing it back into the tool baseThe reading between the gauge and pinion should be 0,508 mm (0.020")12Degrease tapers of the pinion and driveshaft prior to assembly COA3568
Reassembly of Gearcase100
1To install the water intake screen, drop it into the water intake cavity, and push it down as far as it will go with screwdriver or other suitable toolTabs on screen must snap into upper intake holes2Locate the propeller shaft assembly and align the forward bearing housing with the shifter detent toward the topPush the sh ift detent lever down into reverse gear positionBe sure the thrust bearing and thrust washer are properly positionedWith the filldrain plug removed from the gearcase, insert the propeller shaft assembly into the gearcase as far as possible3Lubricate new shift rod cover O-ring with OMC TripleGuard GreaseInstall the O-ring into the shift rod coverPlace the shift rod grommet and shift rod spacer (extra long shaft mode Is) on the shift rod Grease the threaded end of the shift rod and insert it through the cover bushing4Apply OMC Gasket Compound to both sides of new sh ift rod cover gasket Position the gasket on the gearcaseI nsert the sh ift rod and cover assembly into the gearcase, as shown, and thread the shift rod into the shifter detent about four turns