1992 Johnson Evinrude "EN" 40 thru 55 Service Manual, P/N 508143, Page 63Get this manual
In-Line Fuel Filter Servicing Replace the filter element (or assembly) every 100 operating hours or once each season, whichever comes firstCommercial Models 1sl 1Unscrew in-line filter cover It is not necessary to remove fuel hoses to service filter1sl 2Clean filter canister and shake filter element to remove collected particles1sl 3Clean all parts of the filter assembly and fuel connectors with mild aerosol solvent, and blow dryDo not dry parts with cloth as lint might stick to the parts and clog the passages or prevent the fuel pump valves from seatingDissolve any gummy deposits with OMC Cleaning SolventRecreational Models