1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Manual, Page 65Get this manual
Function Test
Conduct this test with the motor in test tank or on the boatBefore testing, loosen fuel tank gas cap momentarily to release any pressure that may have built upFuel tank must not be more than 30 in(76 cm) below fuel pump
rn 1Remove (obtain locally) fuel pumpthe carburetor and fuel carburetor to hoseConnect pressure gauge between fuel