1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 198Get this manual
Disassembly, V4 Models
Iol 1To separate the adapter and the inner exhaust housing
assembly from the outer exhaust housing, remove the front two rubber thrust mount screws and five retaining screws
2Remove the remaining thrust mount screwLift the mount plate and pry the mount from the adapter3The inner exhaust housing and the water tube are
attached to the adapter with five screwsIf necessary to disassemble, remove the five screws and lift the inner exhaust housing from the adapterDiscard the gasket
4The water tube and water tube grommet can be removed from the base of the inner exhaust housing Assembly, V4 Models