The engine in the Jet is “two-cycle” or two-stroke, which means it combines intake and exhaust during the same crankshaft revolution. Simply put, this action makes the device more polluting, which is why two-stroke engines on all but the smallest motorcycles are illegal. The Jet’s 27-cc motor is legal, but eco-conscious homeowners who don’t need to clear large lawns should look to electric models like the Stihl BGA 85.  Alexander George’s Saves from Piles of Fallen Leaves Got You Down? This Leaf Blower Will Change All That

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The engine in the Jet is “two-cycle” or two-stroke, which means it combines intake and exhaust during the same crankshaft revolution. Simply put, this action makes the device more polluting, which is why two-stroke engines on all but the smallest motorcycles are illegal. The Jet’s 27-cc motor is legal, but eco-conscious homeowners who don’t need to clear large lawns should look to electric models like the Stihl BGA 85.