1990 Johnson Evinrude "ES" Colt/Junior thru 8 Service Manual, P/N 507870, Page 72Get this manual
f.1.l Check
all carburetor body drillings and passages with syringe filled with isopropyl alcohol
4Visually inspect all gasket surfaces for nicks or irregularities 5Check for excessive throttle shaft play Check for throttle valve misalignment6If necessary, remove the calibration pocket core plug to inspect the pocket for damage or restrictions Drive small punch not more than Va in(3 mm) through plug and pry out Install the plug convex side upSecurely flatten plug with flat end punch and plastic malletApply Gasolia sealer to the rim of plug7If 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 f81 8Check for leaks between carburetor body: emulsion pickup tube and