1991 Johnson/Evinrude EI Outboards 2.3 thru 8 Service Manual, Page 73Get this manual
Isl 4 Check all carburetor body drillings and passages with syringe filled with isopropyl alcohol
5Visually inspect all gasket surfaces for nicks or irregularities6check for excessive throttle shaft playCheck for throttle valve misalignment7If necessary, remove the calibration pocket core plug to inspect the pocket for damage or restrictions Drive small punch not more than 18 in(3 mm) through plug and pry out Install the plug convex side upSecurely flatten plug with flat end punch and plastic malletApply Gasoila sealer to the rim of plug8If necessary, remove the lead shot to inspect passage 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 leakage