1971 Evinrude StarFlite 100 HP Outboards Service Manual, PN 4753, Page 25Get this manual
NEEDLE VALVES aInspect the tapered end of the needle valves for grooves, nicks, or wear; replace if necessarySee Figure 3-14bDO NOT attempt to alter the shape of the low-speed needle valvesOARBURETOR BODY a; Clean out all the jets and passages, and the venturi, making sure no gum or varnish deposits remainDry after cleaning with compressed airKeep clean for final reassemblybCheck 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 bindingReplace carburetor body if valves or shafts are excessively worn or damagedNOTE