1993 Johnson Evinrude "ET" 90 degrees LV Service Repair Manual, P/N 508287, Page 211Get this manual
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1371 48 Install new intake manifold gasket(s)dryInstall intake manifold(s)V6, V8install upper manifold first, then the lowerTorque all screws to 60-84 inIbs(7-9 Nm)49thoroughly clean the torsional dam