1971 Johnson 40HP outboards Service Manual, Page 24Get this manual
inadequate fuel delivery, and if so, would eliminate unnecessary replacing of the fuel pumpIf this procedure does not correct the trouble, fuel pump is probably malfunctioning and should be replaced 22 II
REMOVAL OF FUEL PUMP AND FILTER
aDisconnect hoses from pump and filter assemblybTo remove fuel pump, remove two screws attaching pump and filter assembly to power head, and remove pump and filter assemblySee Figure 3-21
CLEANING, INSPECTION, AND REPAIR
aThe fuel pump operating components are not serviced separatelyIf malfunction occurs, replace the complete pumpbInspect the filter for accumulation of sediment by removing the filter cap screw and the filter capSee Figure 3-21cClean 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 Accessory Engine Cleaner (certain solvents will not dissolve these deposits)NOTE