Husqvarna 440 18" 40.9cc 2.4hp 2 Cycle Gas Powered Chain Saw Tree Chainsaw Husqvarna 440 40.9cc 18" 2.4Hp Gas Powered Chain Saw Smart Start The engine and starter have been designed so the machine starts quickly with minimum effort. Air Injection Centrifugal air cleaning system removes larger dust and debris particles before reaching the air filter. This results in reduced air filter cleanings and improved engine life. X Torq Delivers lower fuel consumption and reduced exhaust emission levels in accordance with the worlds most stringent environmental regulations. Quick release air filter Facilitates cleaning and replacement of the air filter.