1978 Johnson 4HP outboards Service Manual, Page 65Get this manual
cPlace new gasket on the exhaust housing Apply oil or liquid soap to end of water tubeAssemble powerhead to exhaust housing, and torque attaching screws to specifications outlined in Section 2dCoat driveshaft splines with OMC Moly LubeDo not coat top surface of shaft as lubricant here may prevent seating of driveshaft in crankshafteInstall gearcase on exhaust housing making sure water tube enters grommet of water pumpfInstall leaf plate assembly, intake manifold, and carburetor as described in Section 3gInstall ignition components and flywheel as described in Section 4hIf removed, install starter as described in Section 71Lower bearing snap ring 2Lower crankshaft seal Figure 5-22Lower Bearing Snap Ring and Seal