1978 Johnson 175, 200, 235 HP Outboard Service Manual, Page 130Get this manual
PINION BEARING SHIMMING aThe driveshaft pinion gear is precisely meshed with the forward and reverse gears by the use of shim or shims between the driveshaft thrust bearing, thrust washer and driveshaft bearing housingTo select the proper shimming, assemble pinion gear to driveshaft and torque nut to 60-65 foot-pounds (8090 Nm)See Figure 6-92 of gauge should just touch top of pmlOnAdd or remove shims as necessary to make this clearanceSee Figure 6-93Carefully set aside the correct shims selectedcRemove pinion gear from driveshaftdInstall pump in gearcase with forward gear, shimsthrust bearing and washer installedBe sure to align pin in front of pump assembly with hole in gear case castingSee Figure 6- 94Seat pump in gearcase as far forward as it will goUnless properly installed, power assist cylinder and push rod will be misaligned with hole in oil pump cover causing push rod to bind
Figure 6- 94Installing Oil Pump in Gearcase eCarefully slide the propeller shaft out of the forward gearfPosition pinion gear in gearcase, oil and install driveshaft in gearcase with thrust washerthrust bearing and shims installedNOTE Needle bearings are loosegSecure pinion gear to driveshaft with pinion nut using driveshaft holding socket #311875 and torque wrenchTorque nut to 60-65 foot-pounds (80-90 Nm)hInstall new seals back to back in driveshaft bearing housing using Special Installer Tool #318673Be sure one seal lip faces out and the other inSee Figure 6-95