1992 Johnson Evinrude "EN" 9.9 thru 30 Service Manual, P/N 508142, Page 191Get this manual
37Place the thermostat and the seal in the cavity provided in the cylinder headSet the spring on top of the thermostat38Apply OMC Gasket Sealing Compound to both sides of new cylinder head water cover gasket; install the gasket and coverStarting with the center screws and working outward, tighten the screws to torque of 60-84 inIbs(7-9 Nm)
1671 39Install the inner and outer exhaust coversCoat both sides of two new gaskets with OMC Gasket Sealing CompoundInstall the screwsStarting with the center screws and working outward, tighten them to torque of 48-84 inIbs(5-9 Nm) 40Apply bead of OMC Adhesive to both sides of new bypass cover gasketInstall the gasket and bypass coverTighten the screws to torque of 60-84 inIbs(7-9 Nm)1681 41Slide new leaf plate gasket over the crankcase studs, then install the leaf plateDo not use sealer on the gasketApply OMC Gel-Seal lito the threads of the flat head screw, then install and tighten the screw1691 42Install new intake manifold gasket over the crankcase studs, then install the manifoldDo not use sealer on the gasketInstall and tighten the fasteners to torque of 60-84 inIbs(7-9 Nm)43Install new powerhead gasketInstall dry, use no sealer44Install the inner exhaust housingTighten the screws to torque of 96-120 inIbs(11-14 Nm)