1989 Johnson Evinrude "CE" Colt/Junior thru 8 Service Manual, P/N 507753, Page 74Get this manual
Fuel Pump Servicing 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 open This 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 replaced
f1l f21 To install new filter element, loosen the 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 securelyFunctional Test Conduct this test on the motor in test tank or on the boatBefore testing, loosen fuel tank gas cap momentarily to release any pressure that may have built up Fuel tank must not be more than 24 in(61 cm) below fuel pump