1993 Johnson Evinrude "ET" 90 degrees CV Service Manual, P/N 508285, Page 79Get this manual
Carburetor Body
f21 1Check all drillings and passages with syringe filled with isopropyl alcohol2Visually inspect all gasket surfaces for nicks or irregularities3Check for excessive throttle shaft playCheck for throttle valve misalignmentf31 4If necessary, remove the calibration pocket core plugs to inspect the pocket for damage or restrictions: Drive small punch not more than through plug and pry out18
Install new core plug with the convex side upSeat the plug using flat end punch and plastic malletApply Gasoila sealer, OMC PIN 200763, to the rim of the core plug after it is seatedf41 5If necessary, remove the lead shots to inspect passages for restrictions or leaks: Gently pry up on lead shot with sharp-edged tool Install new lead shotFlatten shot with flat end punch and plastic malletCheck for leakage1sl 6Check for leaks between emulsion pickup tube and carburetor body: Invert carburetor body and fill idle circuit with isopropyl alcohol Check for leaks at point