1998 Johnson Evinrude EC 50 thru 70 HP 3-Cylinder Service Manual, Page 183Get this manual
3Remove the screws from the inner exhaust housing to the adapterRemove the adapter from the inner exhaust housingRemove the water tube and seal from the inner exhaust housingMark the water tube and inner exhaust housing for correct orientation
4Remove the screws from the megaphoneRemove the megaphone and discard the gasket
5Check baffle and gasket condition, replace if necessary
Assembly
OMC Gasket Sealing Compound to both sides of new megaphone gasketPlace the gasket and megaphone on the adapterInstall the screws and tighten to torque of 60-84 inIbs(7-9 Nm)
1Clean the adapter and megaphone gasket surfacesApply