1988 Johnson/Evinrude "CC" 40 thru 55 Models Service Manual, Page 224Get this manual
Shift Rod Heights Standard shaft models 15 2932 in 132 in(404 mm 0,8 mm) 20 2932 in 132 in (531 mm 0,8 mm)
Long shaft models
30 Install the water pump as described in Water Pump ServicingInstallation 1Place new O-ring on the driveshaftCoat the driveshaft splines with OMC Moly LubeDo not coat top surface of the drives haft as lubricant here may prevent seating of the driveshaft in the crankshaftr;;n) 2If the lower inner exhaust housing came out with the
gearcase, check the condition of the seal on the housingReplace the seal if necessaryApply Scotch-Grip Rubber Adhesive 1300 to the inside of the seal and place the lower inner exhaust housing in cavity of the gearcase3Slide the gearcase into place making sure that the driveshaft engages the crankshaft, the water tube enters the water pump, and be sure the lower inner exhaust housing does not slip out of position