1998 Johnson Evinrude "EC" 90, 115 SPL Service Manual, P/N 520209, Page 154Get this manual
58If the overboard water indicator fitting has been removed from the exhaust manifold cover, apply OMC Gel-Seal lito threads of the fitting before installing59Apply OMC Gasket Sealing Compound to new bypass cover gaskets and place the gaskets onto the cylinder blockInstall the bypass coversTighten the screws to torque of 50-84 inIbs(5,7-9 Nm)60Service the leaf valve assemblies as described in Section 2Install the intake manifold using new gasket61Assemble the carburetion, ignition and electrical components to the powerhead