Gold Eagle 21205 4-oz. Start Your Engines Fuel Treatment, Advanced chemistry provides quick, easy starts and smooth running after storage and in season. Safe for use in any 2- and 4-cycle small engine. Easy to use; just pour in the engine's fuel tank. One bottle treats up to a gallon of fuel. Cures rough idle and warm engine stalling. Restores combustible components of stale gas. Cleans and removes varnish from carburetor surfaces. Easy starting and smooth idle for lawn mowers, string trimmers, power blowers, snow throwers, outboard motors, motorcycles, snowmobiles and any small engine.