1990 Johnson Evinrude "ES" 60 thru 70 Service Manual, P/N 507873, Page 169Get this manual
10Place the exhaust housing assembly in the steering arm and lower mount bracket11Apply OMC Locquic Primer and OMC Nut Lock to the four screws, lower mount to bracketInstall the screws and lockwashersInstall the locknuts on the upper mount screwsReplace the locknuts if definite resistance to tightening is not felt& 12Torque the mount fasteners! Torque the upper mount nuts to 30-32 ftIbs(41-43 Nm) Torque the lower mount screws to 24-26 ftIbs(3235 Nm)
place under the steering arm, install the two screwsTighten the screws to torque of 28-30 ft.lbs(38-41 Nm)Install and tighten locknutsReplace the locknuts if definite resistance to tightening is not felt