CLEANING GUM AND VARNISH FROM CARBURETORS. Sea Foam Motor Treatment works in fuel to safely and effectively dissolve petroleum gum and varnish residues and deposits, helps to clear up carburetor passages and reclaim normal engine function. Sea Foam Spray works to deliver a high concentration of petroleum cleaning solvency to carburetor and injection intakes. Helpful Tips: When cleaning, remove tank fuel and drain the carburetor. Use fresh fuel whenever possible – Old fuel lacks “light ends” necessary for vapor formation during ignition. Add a cleaning dosage of Sea Foam Motor Treatment to fresh tank fuel. Start with 15mL per liter of fuel, then add more if needed – The more Sea Foam you add to fuel, the better it cleans! If the engine does not run, crank engine or use primer to deliver new treated fuel into the carburetor, then allow Sea Foam to saturate and soak the bowl and jets for 24 hours. If the engine starts and runs, Sea Foam will work to dissolve residues as the treated fuel is drawn through the carburetor. For quick intake or hot soak cleaning, use Sea Foam Spray Top Engine Cleaner & Lube with induction tube.  (see instructions) Remember, Sea Foam and Sea Foam Spray are made from highly-refined petroleum and cannot cause harm to an engine. Sea Foam in your tank at all times is always cleaning and lubricating the entire fuel system!