CRC Clean-R-Carb is an effective in-place carburettor cleaner that removes deposits of gum, varnish, lacquer, resin paraffin, metallic salts, oil, oxides, tar and gasoline stains. Regular cleaning with CRC Clean-R-Carb prevents gum deposit build-up in carburettors, giving faster starting, smooth idling and improved petrol economy.CRC Clean-R-Carb removes carbon build-up and deposits on injectors, alloy heads, cylinders, pistons and linkages eliminating the need to use wire brushes thus avoiding damage to soft metal alloys.