1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 68Get this manual
Fuel Pump Before replacing suspect fuel pump, remove and clean the fuel filter and install new filter elementAlso remove the fuel line from the fuel tank and blow through all passages and lines with low-pressure, compressed air to be sure they are openThis may be the cause of inadequate fuel delivery, and if so, would eliminate unnecessary replacement of the fuel pumpIf this procedure does not correct the trouble, fuel pump is probably malfunctioning and should be replacedI:A
To prevent excessive fuel spillage, disconnect line connector at motor before disassemblyAfter servicing, check for leaks by connecting fuel line to
ill motor and squeezing primer bulb until definite resistance is
felt in bulbthe screw retaining the fuel pump cover to the fuel pumpWhen installing the filter elementplace the lip of the element toward the gasket Install the fuel pump cover and tighten the screw securelyFuel Pump: To install new filter element, loosen screw and remove cover Do not lose small a-ring from around center post or large a-ring from outer edge of cover