Fix poor or non-running engines with the 24 oz. Synthetic Fuel Additive. It works in your power equipment with 2- and 4-cycle engines. It removes all varnish in the fuel system without having to take out the carburetor. It removes carbon deposits and water, reconditions rubber and plastic components and revitalizes old fuel. Use this additive to rejuvenate your equipment's fuel system so it starts efficiently and operates in top condition.