1988 Johnson Evinrude "CC" 9.9 thru 30 Service Manual, P/N 507660, Page 203Get this manual
Installation
Apply liberal bead of black RTV sealer PIN 263753 around the lower crankcase head as shown
2Coat driveshaft splines with OMC Moly LubeDo not coat top surface of driveshaft as lubricant here may prevent seating of driveshaft in crankshaftBe sure that the O-ring is in end of the crankshaft71 3Check to be sure the water tube washer is positioned on the water tubeLightly apply OMC Triple -Guard grease to upper outside diameter of the water tube 4Assemble the powerhead to the exhaust housing, making sure the water tube enters the inner exhaust housing Rotate the powerhead slightly back and forth to align the crankshaft and the driveshaft splines
Install and tighten the four powerhead retaining screws to torque of 192-216 inIbs(22-24 Nm)
6Apply OMC Nut Lock to the threads of the port and starboard exhaust housing studsPlace the washer on the studsInstall and tighten the two powerhead retaining nuts to torque of 192-216 inIbs(22-24 Nm)