Cleans fuel injectors, carburetors and intake valves. 1-step fuel system revitalizer. Restores volatility to stale fuel and removes gum and varnish from fuel system components. Ensures easy engine starting of outdoor power equipment, and smoothes out rough idle and helps eliminate warm stalling. Safe to use in all types of gas, and gas/oil mixtures, works with all small gasoline engine equipment, 2-cycle and 4-cycle engines.