1.Keep the muffler, air intake filter clean and the spark arrester in place.
2.Remove and service the starter if starter-cord does not fully retract.
3.Use the correct fuel (gasoline or a gas/oil mix) as recommended by the manufacturer. For fuel mixtures, mix gasoline and engine oil according to the manufacturer's recommendations. Too much oil will make the saw run"dirty"; too little oil will damage the engine parts.
4.Do not use a saw in need of repair. Remove and replace any damaged parts.