The Husqvarna 545 Mark II Gas Chainsaw features best-in-class cutting capacity that's ready felling, limbing and bucking small and midsize trees. Designed for professional forestry and tree cutting crews, this 20 inch chainsaw has a powerful yet slimmed-down design. Several innovative featureslike a magnesium crankcase and forged three-piece crankshaftguarantee maximum durability for tough professional use. The 545 Mark II features Smart Start for effortless start-up and a side-mounted tensioning system that's positioned for easy slack adjustments. For enhanced comfort, these Husqvarna chainsaws feature LowVib technology to reduce vibration levels. This gas powered chainsaw is equipped with Air Injection to remove dust and debris before it reaches the air filter and AutoTune to optimize engine performance during various working conditions. The 3.6-HP X-Torq engine uses Husqvarna 2-stroke lubricant or equivalent 50:1 fuel mix ratio with an oil tank volume of 0.68 US pint or 0.32 I.