The Gasket Genius small service kit fits Husqvarna 36, 41, 136, 137, 141 and 142 chainsaws, with one fuel filter, one oil filter, one fuel pipe, one oil pipe, one spark plug, one exhaust muffler gasket and one carburettor gasket included. The filters trap debris before it reaches the carburettor and oil pump, the pipes carry fuel and bar oil without leaking, the spark plug provides the spark for ignition, and the muffler and carburettor gaskets seal the exhaust and intake joints. Wear across any of these typically shows up as hard starting, an exhaust or carburettor air leak, or reduced oil delivery to the guide bar. Fitting this kit renews all of them in a single service.