1997 Johnson Evinrude "EU" 9.9 thru 30 2-Cylinder Service Manual, P/N 507263, Page 66Get this manual
Fuel Pump Servicing Before replacing suspect fuel pump, remove and clean the fuel filter and install new filter elementAlso, remove the fuel hose from the fuel tank and blow through all passages and hoses with low-pressure compressed air to be sure they are openThis might be the cause of inadequate fuel deliveryIf this procedure does not correct the trouble, test the fuel pumpINotel To prevent excessive fuel spillage, disconnect hose connector at motor before disassembly
&After servicing, check for leaks by connecting fuel hose to
To service filter, loosen screw and remove cover Do not lose small a-ring from around center post or large a-ring from outer edge of coverWash filter element with clean solvent and brush