1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Manual, Page 167Get this manual
Disassembly
To simplify reassembly and wiring installation, layout the various screws and clamps in the order of their proper location1To remove the water tube grommet, depress tab of the grommetPush the grommet out of the inner exhaust housing
2Use OMC Grommet Installer, PI 304148, to install new grommetApply OMC Gasket Sealing Compound to outside diameter of the grommetAlign tab of the grommet with hole in the housing and install grommet