1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 61Get this manual
In-Line Fuel Filter Commercial Models f61 1Unscrew in-line filter cover It is not necessary to unclamp fuel hoses to service filterf61 2Clean filter cannister and shake filter element to remove collected particlesf61 3Clean all parts of the filter assembly and fuel connectors in solvent and blow dryDO NOT dry parts with cloth as lint may stick to the parts and clog the passages or prevent the fuel pump valves from seatingDissolve any gummy deposits with OMC Engine Cleaner (certain solvents will not dissolve these deposits)4In-line filter is serviced as complete assembly onlyIt is necessary to replace only if parts are damagedRecreational Models