1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 148Get this manual
1481 32Lightly coat both sides of new cylinder head gasket with OMC Gasket Sealing CompoundInstall the gasket and cylinder headTighten the cylinder head screws in stages to the final torque of 216-240 inIbs(24-27 Nm), following the sequence shown1491 33Install the thermostatspringand isolator in the cylinder head1501 34Install thermostat cover and O-ringTorque screws to 60-84 inIbs(7-9 Nm)35Apply OMC Gasket Sealing Compound to both sides of two new exhaust cover gasketsInstall the inner and outer exhaust coversTighten the screws to torque of 95-130 inIbs(11-14 Nm), starting with the center screws1521 36If the overboard water indicator fitting has been removed from the exhaust cover, apply OMC Gel-Seal II to the fitting threads before installing r;:;J 37Apply OMC Gasket Sealing Compound to both sides of new bypass cover gasketInstall the bypass coverInstall and tighten the screws to torque of 60-84 inIbs(7-9 Nm), starting with the center screws1541 38Install the intake manifold and leaf valve assembly using new gasketsDo not use sealer on these gasketsTighten the screws to torque of 60-84 inIbs(7-9 Nm)39Install the carburetion, ignition and electrical components to the powerhead