1992 Johnson Evinrude "EN" 9.9 thru 30 Service Manual, P/N 508142, Page 79Get this manual
Carburetor Body
L!.J isopropyl alcohol
f41 1Check all drillings and passages with syringe filled with
2Visually inspect all gasket surfaces for nicks or irregularities3Check for excessive throttle shaft playCheck for throttle valve misalignment4If necessary, remove the calibration pocket core plug to inspect the pocket for damage or restrictions: Drive small punch not more than through plug and pry out18