The Gasket Genius service kit fits Stihl FS36, FS40 and FS44 strimmers, trimmers and brushcutters, containing one fuel pipe, one fuel filter, one air filter, one spark plug, one exhaust muffler gasket, one carburettor gasket and one starter rope. Between them these cover the parts a routine service typically calls for: the fuel and air filters keep debris out of the carburettor, the fuel pipe carries fuel without leaking or drawing in air, the spark plug provides the spark for ignition, the muffler and carburettor gaskets seal the exhaust and intake joints, and the starter rope keeps the recoil starter pulling cleanly. Wear across any of these typically shows as hard starting, an exhaust or carburettor air leak, or a snapped pull cord. Fitting this kit renews all of them in one service.