1978 Johnson 55 HP Outboards Service Manual, Page 27Get this manual
CARBURETOR BODY aout all the jets and passages, and the venturi, making sure no gum or varnish deposits remainDry after cleaning with compressed airKeep clean for final reassemblyGOOD
bCheck all gasket surfaces for nicks, scratches, or distortionSlight irregularities can be corrected with the use of surface plate and emery clothcCheck throttle and choke shafts for excessive playCheck operation of choke and throttle valves to be sure they correctly shut off air flow, yet move freely without binding1284