... dirt, gum clean PVC valve, ERG valve, increase combust Captain Carburetor Cleaner, Carb Cleaner, can effectively remove greasy dirt, gum, ... ERG valve, choke and other parts, It can easily flush off the residue on carburetor. The product can increase combustion ... engine. While running, spray into vacuum cylinder.CARBURETOR LINKAGE: Flush oily carburetor linkage with spray to remove dust and dirt ...